CT scanning
computed tomography
A 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.CT scanning
Computer-assisted tomography. An important method of internal X-ray scanning in which an image is built up by a computer from the data derived by analyzing and correlating the output from thousands of separate, serial, low-intensity readings, taken in successive thin planes. The radiation source is mounted on an arm that moves, between exposures, in a helix, and the radiation detector maintains a constant relationship to the source. Images can be reconstructed from the stored readings so as to appear in any desired plane or orientation. A recent development is spiral scanning that greatly speeds up the process and allows a complete chest scan within a single breath-hold. Also known as CAT scanning.CT scanning
Patient discussion about CT scanning
Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..