2469 lines
92 KiB
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2469 lines
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|
||
|
||
<a href="/Understanding-Medical-Scans-App" target="_self" class="link" data-drupal-link-system-path="node/68546"> <span>Medical Imaging App</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
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|
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|
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|
||
<li class="usa-nav__submenu-item">
|
||
|
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|
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|
||
|
||
<a href="/science-education/beams-challenge" class="link" data-drupal-link-system-path="node/143486"> <span>Lesson Plans</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
|
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|
||
<li class="usa-nav__submenu-item">
|
||
|
||
|
||
|
||
|
||
<a href="/science-education/meet-a-scientist" class="link" data-drupal-link-system-path="node/141721"> <span>Meet a Scientist</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
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|
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|
||
<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
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<a href="https://www.youtube.com/playlist?list=PLYH1eUq1QYrqrvA6HRRgKHcPsoJoJA6Kj" target="_blank" class="link"> <span>Featured Videos</span>
|
||
</a>
|
||
|
||
</li>
|
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|
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|
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|
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|
||
<li class="usa-nav__submenu-item">
|
||
|
||
|
||
|
||
|
||
<a href="/science-education/glossary" target="_self" class="link" data-drupal-link-system-path="science-education/glossary"> <span>Glossary</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
|
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</li>
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|
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<li class="usa-nav__primary-item">
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<button type="button" class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-5">
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<span>News & Events </span>
|
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</button>
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<div id="extended-mega-nav-section-5" class="usa-nav__submenu usa-megamenu" hidden="">
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<div class="grid-row mm-container">
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<div class="desktop:grid-col flex-auto duplicated-parent">
|
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<div class="usa-nav__submenu-item">
|
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<span><a href="/news-events" target="_self" class="link" data-drupal-link-system-path="node/156671">News & Events</a> <span class="uswds-arrow-forward"></span></span>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
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<div class="grid-row mm-container">
|
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<div class="desktop:grid-col-4 submenu-list-container">
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<div class="usa-nav__submenu-item">
|
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<span target="_self" class="nolink"> <span class="usa-nav__submenu-heading">NEWS</span>
|
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</span>
|
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</div>
|
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|
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<ul id="basic-nav-section-1" class="usa-nav__submenu-list">
|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
||
|
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<a href="/news-events/newsroom" class="link" data-drupal-link-system-path="news-events/newsroom"> <span>Newsroom</span>
|
||
</a>
|
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|
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</li>
|
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|
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|
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|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
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<a href="/news-events/press-releases" target="_self" class="link" data-drupal-link-system-path="news-events/press-releases"> <span>Press Releases</span>
|
||
</a>
|
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|
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</li>
|
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|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
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<a href="/news-events/science-highlights" target="_self" class="link" data-drupal-link-system-path="news-events/science-highlights"> <span>Science Highlights</span>
|
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</a>
|
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|
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</li>
|
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<li class="usa-nav__submenu-item">
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|
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<a href="/news-events/nibib-news" target="_self" class="link" data-drupal-link-system-path="news-events/nibib-news"> <span>NIBIB in the News</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
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|
||
</ul>
|
||
|
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|
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|
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|
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</div>
|
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|
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|
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|
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<div class="desktop:grid-col-4 submenu-list-container">
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<div class="usa-nav__submenu-item">
|
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<span class="nolink"> <span class="usa-nav__submenu-heading">EVENTS</span>
|
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</span>
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</div>
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<ul id="basic-nav-section-2" class="usa-nav__submenu-list">
|
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<li class="usa-nav__submenu-item">
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|
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|
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|
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<a href="/news-events/meetings-events/upcoming-events" class="link" data-drupal-link-system-path="news-events/meetings-events/upcoming-events"> <span>Upcoming Events</span>
|
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</a>
|
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|
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</li>
|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
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<a href="/news-events/meetings-events/past-events" class="link" data-drupal-link-system-path="news-events/meetings-events/past-events"> <span>Past Events</span>
|
||
</a>
|
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|
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</li>
|
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|
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<li class="usa-nav__submenu-item">
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|
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|
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<a href="/news-events/meetings-events/photo-galleries" class="link" data-drupal-link-system-path="news-events/meetings-events/photo-galleries"> <span>Event Photos</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
|
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|
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|
||
</div>
|
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|
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|
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|
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|
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<div class="desktop:grid-col-4 submenu-list-container">
|
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|
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<div class="usa-nav__submenu-item">
|
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<span target="_self" class="nolink"> <span class="usa-nav__submenu-heading">MEDIA RESOURCES</span>
|
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</span>
|
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</div>
|
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|
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|
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|
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|
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|
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<ul id="basic-nav-section-3" class="usa-nav__submenu-list">
|
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|
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<li class="usa-nav__submenu-item">
|
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|
||
|
||
|
||
|
||
<a href="/science-education/science-topics" target="_self" class="link" data-drupal-link-system-path="node/131271"> <span>Science Topics</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
|
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|
||
<li class="usa-nav__submenu-item">
|
||
|
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|
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|
||
|
||
<a href="mailto:nibibpress@mail.nih.gov" target="_self" class="link"> <span>Contact Us</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
|
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|
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|
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|
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</li>
|
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|
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|
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|
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<li class="usa-nav__primary-item">
|
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|
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<button type="button" class="usa-accordion__button usa-nav__link " aria-expanded="false" aria-controls="extended-mega-nav-section-6">
|
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<span>About NIBIB </span>
|
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</button>
|
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|
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|
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|
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|
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<div id="extended-mega-nav-section-6" class="usa-nav__submenu usa-megamenu" hidden="">
|
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|
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<div class="grid-row mm-container">
|
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<div class="desktop:grid-col flex-auto duplicated-parent">
|
||
<div class="usa-nav__submenu-item">
|
||
<span><a href="/about-nibib" target="_self" class="link" data-drupal-link-system-path="node/156676">About NIBIB</a> <span class="uswds-arrow-forward"></span></span>
|
||
</div>
|
||
</div>
|
||
</div>
|
||
|
||
<div class="grid-row mm-container">
|
||
|
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|
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|
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|
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<div class="desktop:grid-col-4 submenu-list-container">
|
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|
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<div class="usa-nav__submenu-item">
|
||
<span target="_self" class="nolink"> <span class="usa-nav__submenu-heading">WHO WE ARE</span>
|
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</span>
|
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</div>
|
||
|
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|
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|
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|
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|
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|
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<ul id="basic-nav-section-1" class="usa-nav__submenu-list">
|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
||
<a href="/about-nibib/mission" target="_self" class="link" data-drupal-link-system-path="node/79861"> <span>Mission & History</span>
|
||
</a>
|
||
|
||
</li>
|
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|
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|
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|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
||
<a href="/about-nibib/directors-corner" target="_self" class="link" data-drupal-link-system-path="node/121791"> <span>Director's Corner</span>
|
||
</a>
|
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|
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</li>
|
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|
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|
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|
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|
||
<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
||
<a href="/about-nibib/organizational-chart" target="_self" class="link" data-drupal-link-system-path="node/18836"> <span>Organization Chart</span>
|
||
</a>
|
||
|
||
</li>
|
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|
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|
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|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
||
|
||
<a href="/about-nibib/advisory-council" target="_self" class="link" data-drupal-link-system-path="node/876"> <span>Advisory Council</span>
|
||
</a>
|
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|
||
</li>
|
||
|
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|
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|
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|
||
<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
||
<a href="/about-nibib/careers-at-NIBIB" target="_self" class="link" data-drupal-link-system-path="node/131241"> <span>Jobs @ NIBIB</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
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|
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|
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|
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</div>
|
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|
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|
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|
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|
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<div class="desktop:grid-col-4 submenu-list-container">
|
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<div class="usa-nav__submenu-item">
|
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<span target="_self" class="nolink"> <span class="usa-nav__submenu-heading">WHAT WE DO</span>
|
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</span>
|
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</div>
|
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|
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|
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<ul id="basic-nav-section-2" class="usa-nav__submenu-list">
|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
||
<a href="/about-nibib/strategic-plan" target="_self" class="link" data-drupal-link-system-path="node/11846"> <span>Strategic Plan</span>
|
||
</a>
|
||
|
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</li>
|
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|
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|
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|
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|
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<li class="usa-nav__submenu-item">
|
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|
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|
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|
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|
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<a href="/about-nibib/budget" target="_self" class="link" data-drupal-link-system-path="node/911"> <span>Budget</span>
|
||
</a>
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
||
|
||
|
||
|
||
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
|
||
|
||
|
||
|
||
</li>
|
||
|
||
|
||
</ul>
|
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|
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|
||
|
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|
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|
||
|
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|
||
<div class="usa-nav__secondary">
|
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<div>
|
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<section aria-label="search component" id="nibib-header-search" data-drupal-selector="search-block-form" role="search">
|
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<form id="search-block-form" accept-charset="UTF-8" class="usa-search usa-search--small" role="search" action="/searching" method="get">
|
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<label class="usa-sr-only" for="search-field-en-small">Search</label>
|
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<input aria-label="Search" class="usa-input" id="edit-keys" data-drupal-selector="edit-keys" data-original-title="Enter the terms you wish to search for." data-toggle="tooltip" type="search" name="q" value="" tabindex="-1"/>
|
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<button class="usa-button js-form-submit form-submit" name="search_btn" type="submit" value="Search" tabindex="-1">
|
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<img src="/themes/custom/nibib/assets/uswds/img/usa-icons-bg/search--white.svg" class="usa-search__submit-icon" alt="Search" />
|
||
</button>
|
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</form>
|
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</section>
|
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</div>
|
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|
||
|
||
|
||
<ul class="header-nav__secondary-list">
|
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<li class="header-nav__secondary-item">
|
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<a href="/es/nibib-en-espanol"> En Español
|
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</a>
|
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</li>
|
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<li class="header-nav__secondary-item">
|
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<a target="_blank" class="link-list-serve" href="https://public.govdelivery.com/accounts/USNIBIB/subscriber/edit?preferences=true#tab1"> Join LISTSERV
|
||
</a>
|
||
</li>
|
||
</ul>
|
||
|
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|
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|
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|
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|
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</div>
|
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</div>
|
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</nav>
|
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</header>
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|
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<main class="main-content usa-layout-docs usa-section " role="main" id="main-content">
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<div class="grid-container">
|
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<div class="grid-row breadcrumb-social-share-bar">
|
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<div class="tablet:grid-col-6 desktop:grid-col-8">
|
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<div>
|
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<div id="block-breadcrumbs" class="block block-system block-system-breadcrumb-block">
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<nav class="usa-breadcrumb--wrap" role="navigation" aria-label="breadcrumb">
|
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<ol class="usa-breadcrumb__list">
|
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<li class="usa-breadcrumb__list-item">
|
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<a href="/" class="usa-breadcrumb__link"><span>Home</span></a>
|
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</li>
|
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<li class="usa-breadcrumb__list-item">
|
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<a href="/science-education" class="usa-breadcrumb__link"><span>Science Education</span></a>
|
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</li>
|
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<li class="usa-breadcrumb__list-item">
|
||
<a href="/science-education/science-topics" class="usa-breadcrumb__link"><span>Science Topics</span></a>
|
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</li>
|
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</ol>
|
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</nav>
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|
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</div>
|
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</div>
|
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</div>
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<div class="tablet:grid-col-6 desktop:grid-col-4">
|
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<div>
|
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<div id="block-addtoanysharebuttons" class="block block-addtoany block-addtoany-block">
|
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|
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|
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<span class="a2a_kit a2a_kit_size_32 addtoany_list" data-a2a-url="https://www.nibib.nih.gov/science-education/science-topics/computed-tomography-ct" data-a2a-title="Computed Tomography (CT) "><a class="a2a_button_email"><span class="a2a_svg a2a_s_a2a a2a_s_email a2a-box"><img src="/themes/custom/nibib/assets/img/email-a2a.svg" border="0" alt="Facebook" width="27" height="27"></span></a><a class="a2a_button_facebook"><span class="a2a_svg a2a_s_a2a a2a_s_facebook a2a-box"><img src="/themes/custom/nibib/assets/img/facebook-a2a.svg" border="0" alt="Facebook" width="27" height="27"></span></a><a class="a2a_button_linkedin"><span class="a2a_svg a2a_s_a2a a2a_s_linkedin a2a-box"><img src="/themes/custom/nibib/assets/img/linkedin-a2a.svg" border="0" alt="Facebook" width="27" height="27"></span></a><a class="a2a_button_twitter"><span class="a2a_svg a2a_s_a2a a2a_s_x a2a-box"><img src="/themes/custom/nibib/assets/img/x-a2a.svg" border="0" alt="Facebook" width="27" height="27"></span
|
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</a><a class="a2a_button_whatsapp"><span class="a2a_svg a2a_s_a2a a2a_s_whatsapp a2a-box"><img src="/themes/custom/nibib/assets/img/whatsapp-a2a.svg" border="0" alt="Facebook" width="27" height="27"></span></a><a class="a2a_dd addtoany_share"><span class="a2a_svg a2a_s_a2a a2a_s_share a2a-box"><img src="/themes/custom/nibib/assets/img/share-a2a.svg" border="0" alt="Share" width="27" height="27"></span></a></span>
|
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|
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</div>
|
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</div>
|
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|
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</div>
|
||
</div>
|
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|
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<div class="">
|
||
<div data-drupal-messages-fallback class="hidden"></div>
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|
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|
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</div>
|
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|
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<div class="grid-row ">
|
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|
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</div>
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<div class="grid-row grid-gap">
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<div class="usa-layout-docs__sidenav desktop:grid-col-3 layout-sidebar-first">
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<ul class="usa-sidenav">
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|
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|
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|
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<li class="usa-sidenav__item expanded dropdown active active-trail first">
|
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<span target="_self" class="nolink usa-current dropdown-toggle" data-toggle="dropdown">SCIENCE TOPICS</span>
|
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|
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<ul class="usa-sidenav__sublist">
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|
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|
||
|
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|
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<li class="usa-sidenav__item first">
|
||
<a href="/science-education/science-topics/artificial-intelligence-ai" class="link" data-drupal-link-system-path="node/114791">Artificial Intelligence (AI)</a>
|
||
</li>
|
||
|
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|
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|
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|
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|
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|
||
<li class="usa-sidenav__item">
|
||
<a href="/science-education/science-topics/biomaterial-technologies" class="link" data-drupal-link-system-path="node/156766">Biomaterial Technologies</a>
|
||
</li>
|
||
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<span>Computed Tomography (CT) </span>
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<article data-history-node-id="18996" about="/science-education/science-topics/computed-tomography-ct" class="node node--type-science-topic">
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<ul id="science-topic-anchor-tag-list">
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<li>
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<a href="#pid-1016">What is a computed tomography (CT) scan?</a>
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<li>
|
||
<a href="#pid-1021">How does CT work?</a>
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|
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<a href="#pid-1026">When would I get a CT scan?</a>
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<li>
|
||
<a href="#pid-1031">What is a CT contrast agent?</a>
|
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</li>
|
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<li>
|
||
<a href="#pid-1036">Are there risks?</a>
|
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<a href="#pid-1041">What are examples of NIBIB-funded projects using CT?</a>
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<div class="field field--name-field-science-topic field--type-entity-reference-revisions field--label-hidden field--items">
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<div class="field--item"> <div id="pid-1016" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
|
||
<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">What is a computed tomography (CT) scan?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><p>The term “computed tomography,” or CT, refers to a computerized x-ray imaging procedure in which a narrow beam of x-rays is aimed at a patient and quickly rotated around the body, producing signals that are processed by the machine’s computer to generate cross-sectional images, or “slices.” These slices are called tomographic images and can give a clinician more detailed information than conventional x-rays. Once a number of successive slices are collected by the machine’s computer, they can be digitally “stacked” together to form a three-dimensional (3D) image of the patient that allows for easier identification of basic structures as well as possible tumors or abnormalities.</p>
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</div>
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</div>
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</div>
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<div class="field--item"> <div id="pid-1021" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
|
||
<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">How does CT work?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><figure role="group" class="align-right">
|
||
<div alt="A CT machine" data-embed-button="file_browser" data-entity-embed-display="image:image" data-entity-embed-display-settings="{"image_style":"","image_link":"","image_loading":{"attribute":"lazy"}}" data-entity-type="file" data-entity-uuid="2f3249b9-40ac-48aa-adc0-a8f5194933cf" data-langcode="und" title="A CT machine" class="embedded-entity"> <img loading="lazy" src="/sites/default/files/inline-images/CT-machine-istock-400x300.jpg" alt="A CT machine" title="A CT machine" typeof="foaf:Image"></p>
|
||
</div>
|
||
<figcaption>A CT machine. <em>Credit:</em> iStock</figcaption>
|
||
</figure>
|
||
<p style="margin-bottom:11px">Unlike a conventional x-ray—which uses a fixed x-ray tube—a CT scanner uses a motorized x-ray source that rotates around the circular opening of a donut-shaped structure called a gantry. During a CT scan, the patient lies on a bed that slowly moves through the gantry while the x-ray tube rotates around the patient, shooting narrow beams of x-rays through the body. Instead of film, CT scanners use special digital x-ray detectors, which are located directly opposite the x-ray source. As the x-rays leave the patient, they are picked up by the detectors and transmitted to a computer.</p>
|
||
<p>Each time the x-ray source completes one full rotation, the CT computer uses sophisticated mathematical techniques to construct a two-dimensional image slice of the patient. The thickness of the tissue represented in each image slice can vary depending on the CT machine used, but usually ranges from 1-10 millimeters. When a full slice is completed, the image is stored and the motorized bed is moved forward incrementally into the gantry. The x-ray scanning process is then repeated to produce another image slice. This process continues until the desired number of slices is collected.</p>
|
||
<p>Image slices can either be displayed individually or stacked together by the computer to generate a 3D image of the patient that shows the skeleton, organs, and tissues as well as any abnormalities the physician is trying to identify. This method has many advantages including the ability to rotate the 3D image in space or to view slices in succession, making it easier to find the exact place where a problem may be located.</p>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
<div class="field--item"> <div id="pid-1026" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
|
||
<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">When would I get a CT scan?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><p style="margin-bottom:11px">CT scans can be used to identify disease or injury within various regions of the body. For example, CT has become a useful screening tool for detecting possible tumors or lesions within the abdomen. A CT scan of the heart may be ordered when various types of heart disease or abnormalities are suspected. CT can also be used to image the head in order to locate injuries, tumors, clots leading to stroke, hemorrhage, and other conditions. It can image the lungs in order to reveal the presence of tumors, pulmonary embolisms (blood clots), excess fluid, and other conditions such as emphysema or pneumonia. A CT scan is particularly useful when imaging complex bone fractures, severely eroded joints, or bone tumors since it usually produces more detail than would be possible with a conventional x-ray.</p>
|
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</div>
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||
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</div>
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</div>
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<div class="field--item"> <div id="pid-1031" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
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<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">What is a CT contrast agent?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><figure role="group" class="align-right">
|
||
<img alt="CT scan of the abdomen" data-entity-type="file" data-entity-uuid="09bd0d9b-7320-44fb-8a2a-3f55ae6f206a" src="/sites/default/files/inline-images/CT-abdomen-400x267.jpg" width="400" height="267"></p>
|
||
<figcaption>CT scan of the abdomen. <em>Credit:</em> iStock</figcaption>
|
||
</figure>
|
||
<p>As with all x-rays, dense structures within the body—such as bone—are easily imaged, whereas soft tissues vary in their ability to stop x-rays and therefore may be faint or difficult to see. For this reason, contrast agents have been developed that are highly visible in an x-ray or CT scan and are safe to use in patients. Contrast agents contain substances that can stop x-rays and are therefore more visible on an x-ray image. For example, to examine the circulatory system, an intravenous (IV) contrast agent based on iodine is injected into the bloodstream to help illuminate blood vessels. This type of test is used to look for possible obstructions in blood vessels, including those in the heart. Oral contrast agents, such as barium-based compounds, are used for imaging the digestive system, including the esophagus, stomach, and gastrointestinal (GI) tract.</p>
|
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</div>
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||
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</div>
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</div>
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<div class="field--item"> <div id="pid-1036" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
|
||
<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">Are there risks?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><p style="margin-bottom:11px">CT scans can diagnose possibly life-threatening conditions such as hemorrhage, blood clots, or cancer. An early diagnosis of these conditions could potentially be lifesaving. However, CT scans use x-rays, and all x-rays produce ionizing radiation. Ionizing radiation has the potential to cause biological effects in living tissue. This is a risk that increases with the number of exposures added up over the life of an individual. However, the risk of developing cancer from x-ray radiation exposure is generally small.</p>
|
||
<figure role="group" class="align-left">
|
||
<img alt="CT images of the heart" data-entity-type="file" data-entity-uuid="b4064bdf-de23-41d0-9a9d-50f2c638e869" src="/sites/default/files/inline-images/CT-human-heart-400x273.jpg" width="400" height="273"></p>
|
||
<figcaption>CT images of the heart and coronary artery. <em>Credit:</em> iStock</figcaption>
|
||
</figure>
|
||
<p>A CT scan in a pregnant woman poses no known risks to the baby if the area of the body being imaged isn’t the abdomen or pelvis. In general, if imaging of the abdomen and pelvis is needed, doctors prefer to use exams that do not use radiation, such as magnetic resonance imaging (MRI) or ultrasound. However, if neither of those can provide the answers needed, or there is an emergency or other time constraint, CT may be an acceptable alternative imaging option.</p>
|
||
<p>In some patients, contrast agents may cause allergic reactions, or in rare cases, temporary kidney failure. IV contrast agents should not be administered to patients with abnormal kidney function since they may induce a further reduction of kidney function, which may sometimes become permanent.</p>
|
||
<p>Because children are more sensitive to ionizing radiation and have a longer life expectancy, they have a higher relative risk for developing cancer from such radiation compared with adults. Parents may want to ask the technologist or doctor if their machine settings have been adjusted for children.</p>
|
||
</div>
|
||
|
||
|
||
</div>
|
||
</div>
|
||
<div class="field--item"> <div id="pid-1041" class="paragraph paragraph--type--science-topic paragraph--view-mode--full">
|
||
<h2>
|
||
|
||
<div class="field field--name-field-science-topic-title field--type-string field--label-hidden field__item">What are examples of NIBIB-funded projects using CT?</div>
|
||
</h2>
|
||
|
||
|
||
<div class="field field--name-field-science-topic-description field--type-text-long field--label-hidden field__item"><p style="margin-bottom:11px"><a href="https://reporter.nih.gov/project-details/9529646">Imaging for acute ischemic stroke:</a> Stroke, which can have lasting neurological injuries, is also a leading cause of death worldwide. To mitigate damage to the brain, patients may receive endovascular treatment, where the clot blocking the blood supply is either removed or dissolved. However, identifying patients who will benefit from endovascular therapy, such as those with only a small volume of irreversibly injured brain tissue, remains challenging, and time is a critically important factor for a successful clinical outcome.</p>
|
||
<figure role="group" class="align-left">
|
||
<div alt="Patient inside of a CT machine" data-embed-button="file_browser" data-entity-embed-display="image:image" data-entity-embed-display-settings="{"image_style":"","image_link":""}" data-entity-type="file" data-entity-uuid="498e9581-03fe-4932-97ae-5c48621b2e5d" data-langcode="und" title="Patient inside of a CT machine" class="embedded-entity"> <img loading="lazy" src="/sites/default/files/inline-images/CT-Patient-400x276.jpg" alt="Patient inside of a CT machine" title="Patient inside of a CT machine" typeof="foaf:Image"></p>
|
||
</div>
|
||
<figcaption>Patient inside of a CT machine. <em>Credit:</em> iStock</figcaption>
|
||
</figure>
|
||
<p>NIBIB-funded researchers have developed an image reconstruction technique to more efficiently triage patients who present with symptoms of a stroke. This CT-based method can be used to rule out the presence of a hemorrhage; to find the site of the blood clot; and to identify the extent of damaged brain tissue. Such a technique could significantly shorten the time from the diagnosis of a stroke to the start of endovascular therapy, and could also guide the endovascular treatment. Following evaluation in animal models, researchers plan to validate this CT imaging technique in human studies.</p>
|
||
<p><a href="https://reporter.nih.gov/project-details/10087520">Accounting for metal implants in CT imaging:</a> Metal objects, such as implants and prostheses, can introduce ‘artifacts’ that may appear as streaks or shadows on a CT scan. These artifacts can obscure anatomical structures or affect calculations necessary for planning radiation therapy. While techniques exist to reduce such artifacts, they do not fully mitigate the artifacts and may even introduce new ones. In this project, NIBIB-funded researchers have developed an algorithm to reduce metal artifacts in CT imaging, without requiring knowledge of the implant material. The researchers plan to optimize their algorithm and then evaluate their technique as a potential method to improve radiation therapy planning for prostate cancer among those with hip protheses.</p>
|
||
<p><a href="https://www.nibib.nih.gov/medical-imaging-and-data-resource-center">Leveraging CT images to guide treatments for COVID-19 and beyond:</a> Artificial intelligence is increasingly being used with medical imaging, such as CT, to help improve diagnoses and guide treatment decisions. By using medical images and patient outcomes, clinicians can “train” machine learning-based technologies to recognize patterns and predict responses. During the COVID-19 pandemic, NIBIB created a collaborative imaging initiative called the <a href="https://www.midrc.org/">Medical Imaging and Data Resource Center</a> (MIDRC). This initiative collected and analyzed thousands of CT images from patients with COVID-19 for the development of artificial intelligence and machine learning tools to guide the treatment and monitoring of the disease. These datasets contribute to the development of algorithms for detection, prognosis, and optimization of therapy in acute COVID-19 patients and have the potential to contribute to the understanding of Post-Acute Sequelae of SARS-CoV-2 infection (PASC, otherwise known as “Long COVID”). Further, this initiative paves the way for new tools that leverage imaging for other medical conditions, such as cancer, liver disease, or other infectious diseases, among others.</p>
|
||
<p>For more information about CT, watch our video <a href="https://www.youtube.com/watch?v=l9swbAtRRbg">here</a>.</p>
|
||
<p class="text-align-right"><em>Updated June 2022</em></p>
|
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