Filling defect
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A filling defect is a general term used to refer to any abnormality on an imaging study which disrupts the normal opacification (filling) of a cavity or lumen. The opacification maybe physiological, for example, bile in the gallbladder or blood in a dural venous sinus, or maybe due to the installation of contrast medium, for example within a vessel, as part of a CT angiogram, within the bladder, during a cystogram, etc.
Examples
- CT pulmonary angiogram: PE in the pulmonary artery interrupts normal contrast opacification of the vessel
- CT colonogram: polyp in the colon prevents the normal gas and contrast filling of the bowel
- MRCP: calculus in the common bile duct leaves a focus of low signal in the duct
-<p>A <strong>filling defect</strong> is a general term used to refer to any abnormality on an imaging study which disrupts the normal opacification (filling) of a cavity or lumen. The opacification maybe physiological, for example bile in the gallbladder or blood in a dural venous sinus, or maybe due to the installation of <a href="/articles/contrast-medium">contrast medium</a>, for example within a vessel, as part of a <a title="CT angiogram of the chest" href="/articles/ct-angiography-of-the-chest-cta-chest">CT angiogram</a>, within the bladder, during a <a title="Cystogram" href="/articles/cystography-1">cystogram</a>, etc.</p><h4>Examples</h4><ul>- +<p>A <strong>filling defect</strong> is a general term used to refer to any abnormality on an imaging study which disrupts the normal opacification (filling) of a cavity or lumen. The opacification maybe physiological, for example, bile in the gallbladder or blood in a dural venous sinus, or maybe due to the installation of <a href="/articles/contrast-medium">contrast medium</a>, for example within a vessel, as part of a <a href="/articles/ct-angiography-of-the-chest-technique">CT angiogram</a>, within the bladder, during a <a href="/articles/cystography-1">cystogram</a>, etc.</p><h4>Examples</h4><ul>
-<a href="/articles/ct-pulmonary-angiogram-ctpa">CT pulmonary angiogram</a>: <a href="/articles/pulmonary-embolism">PE</a> in the pulmonary artery interrupts normal contrast opacification of the vessel</li>- +<a href="/articles/ct-pulmonary-angiogram-technique">CT pulmonary angiogram</a>: <a href="/articles/pulmonary-embolism">PE</a> in the pulmonary artery interrupts normal contrast opacification of the vessel</li>
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