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COMPUTED TOMOGRAPHY

The Department of Radiology and Nuclear Medicine
of the Uniformed Services University of the Health Sciences
Bethesda, Maryland 20814

COMPUTED TOMOGRAPHY

(CT or CAT Scans)
Computed Tomography

Computed Tomography is a specialized X-ray imaging technique.  It may be performed "plain" or after the injection of a "Contrast Agent".  CT creates the image by using an array of individual small X-Ray sensors and a computer. By spinning the X-Ray source and the sensor/detectors around the patient, data is collected from multiple angles. A computer then processes this information to create an image on the video screen. These images are called "sections" or "cuts" because they appear to resemble cross-sections of the body. This technique eliminates the problem of conventional X-rays, where all the shadows overlap. Don't worry though, the patient is not actually "cut".

Because it does use X-Rays to form the image, this computerized technique has some limitations that are similar to those for plain film radiographs.

Non-Contrast Axial CT.
Tuberous Sclerosis.



 
Normal Abdominal CT.
Oral and IV Contrast.
Level of Liver and Spleen.
Normal Abdominal CT.
Oral and IV Contrast.
Level of Kidneys.

COMPUTED TOMOGRAPHY

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Radiologic Techniques
•  Plain Radiographs (XR)

•  Fluoroscopy

•  Angiography (AN)

•  Computed Tomography (CT)

•  Magnetic Resonance Imaging (MR)

•  Nuclear Medicine (PET/SPECT) (NM)

•  Ultrasound (US)

•  Radiation Oncology

•  Radiology Careers

•  What is Radiology ?

•  USUHS Radiology

 

 
 


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Last update: 03/26/2012


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