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  2. Computed tomography of the head - Wikipedia

    en.wikipedia.org/.../Computed_tomography_of_the_head

    CT scans of the head increase the risk of brain cancer, especially for children. As of 2018, it appeared that there was a risk of one excess cancer per 3,000–10,000 head CT exams in children under the age of 10. [11]

  3. Contrast CT - Wikipedia

    en.wikipedia.org/wiki/Contrast_CT

    A CT pulmonary angiogram, in this case showing pulmonary embolism of saddle-type, which becomes more radiolucent than the radiocontrast filled blood surrounding it (but it may be indistinguishable without radiocontrast). Contrast CT, or contrast-enhanced computed tomography (CECT), is X-ray computed tomography (CT) using radiocontrast.

  4. CT scan - Wikipedia

    en.wikipedia.org/wiki/CT_scan

    CT Perfusion scan of the brain. CT perfusion imaging is a specific form of CT to assess flow through blood vessels whilst injecting a contrast agent. [21] Blood flow, blood transit time, and organ blood volume, can all be calculated with reasonable sensitivity and specificity. [21]

  5. Computed tomography angiography - Wikipedia

    en.wikipedia.org/wiki/Computed_tomography...

    Volume rendered CT scan of abdominal and pelvic blood vessels. CT angiography is a contrast CT where images are taken with a certain delay after injection of radiocontrast material. The contrast material is radiodense causing it to light up brightly within the blood vessels of interest. In order for the CT scanner to be able to scan the correct ...

  6. Spectral imaging (radiography) - Wikipedia

    en.wikipedia.org/wiki/Spectral_imaging_(radiography)

    Spectral imaging is an umbrella term for energy-resolved X-ray imaging in medicine. [1] The technique makes use of the energy dependence of X-ray attenuation to either increase the contrast-to-noise ratio, or to provide quantitative image data and reduce image artefacts by so-called material decomposition.

  7. High-resolution computed tomography - Wikipedia

    en.wikipedia.org/wiki/High-resolution_computed...

    Low-dose high-resolution (1.25 mm) chest CT. HRCT is performed using a conventional CT scanner. However, imaging parameters are chosen so as to maximize spatial resolution: [1] a narrow slice width is used (usually 1–2 mm), a high spatial resolution image reconstruction algorithm is used, field of view is minimized, so as to minimize the size of each pixel, and other scan factors (e.g. focal ...

  8. Empty delta sign - Wikipedia

    en.wikipedia.org/wiki/Empty_delta_sign

    The empty delta sign is a radiologic sign seen on brain imaging which is associated with cerebral venous sinus thrombosis.It is usually seen on magnetic resonance imaging (MRI) or computed tomography (CT) scans with contrast.

  9. Cone beam computed tomography - Wikipedia

    en.wikipedia.org/wiki/Cone_beam_computed_tomography

    Cone beam computed tomography (or CBCT, also referred to as C-arm CT, cone beam volume CT, flat panel CT or Digital Volume Tomography (DVT)) is a medical imaging technique consisting of X-ray computed tomography where the X-rays are divergent, forming a cone.

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