computed axial tomography
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Related to computed axial tomography: CAT scan, magnetic resonance imaging, visceral muscle
computed axial tomography(kəm-pyo͞o′tĭd)
computed tomographyA diagnostic imaging technique in which multiple X-rays are taken from different angles in a single plane and a series of two-dimensional images (”slices”) of the different tissue densities—e.g., fat, muscle, bone, etc.—is constructed by computer. In contrast to conventional radiology, CT results in a 1000-fold increase in image resolution, and can pinpoint lesions < 2 mm in greatest dimension; dyes may be injected IV to increased resolution of abnormal tissue and blood vessels, or radiocontrast can be used for dynamic testing.
com·put·ed ax·i·al to·mog·ra·phy(CAT) (kŏm-pyū'tĕd ak'sē-ăl tŏ-mog'ră-fē)
Synonym(s): computed tomography.
tomography(to-mog'ra-fe) [ tomo- + -graphy]
computed axial tomographyAbbreviation: CAT
See: computed tomography
computed tomographyAbbreviation: CT
CAUTION!CT scans expose patients to radiation on the order of 10 mSv per scan. Educational materials about the potential risks and benefits of scanning should be provided to patients to ensure that scans are performed safely and carefully.
computerized axial tomographyAbbreviation: CAT
See: computed tomography
electrical impedance tomography
electron-beam tomographyUltrafast computed tomography
full body computed tomographyAbbreviation: FBCT
CAUTION!The test exposes patients to high levels of radiation, reveals more false positive findings than true positives, and is expensive.
Heidelberg retinal tomographyAbbreviation: HRT
helical computed tomography
optical coherence tomographyAbbreviation: OCT
positron emission tomographyAbbreviation: PET
The images produced by PET are in colors that indicate the degree of metabolism or blood flow. The highest rates appear red, those lower appear yellow, then green, and the lowest rates appear blue. The images in various disease states may then be compared to those of normal subjects. Three- and four-dimensional reconstructions are often achieved through the use of computed tomography (CT) with the same machine. See: illustration
quantitative computed tomographyAbbreviation: QCT
single photon emission computed tomographyAbbreviation: SPET, SPECT
spiral computed tomographyHelical computed tomography.
ultrafast computed tomography
xenon-enhanced computed tomography
Computed axial tomography; CT or CAT scan
computed axial tomography (km·pyu·tid ak·sē·l t·mˑ·gr·fē),
Patient discussion about computed axial tomography
Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..