Computed tomography scan

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Computed tomography (CT or CAT) scan

A specialized type of x-ray imaging that uses highly focused and relatively low energy radiation to produce detailed two-dimensional images of soft tissue structures, particularly the brain. CT scans are the chief competitor to ultrasound and can yield higher quality images not disrupted by bone or gas. They are, however, more cumbersome, time consuming and expensive to perform, and they use ionizing electromagnetic radiation.
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.

Patient discussion about Computed tomography scan

Q. I get bad headaches had ct scans and m.r.i. even sinus surgery, suffering 2yrs now, dizzness occurs too..

A. If all prior medical investigations turned out normal, and sinus surgery didn't help relieve your symptoms, I would suggest the reason for your headaches is probably migraine attacks, that can cause severe headaches, and no CT scan or MRI can diagnose them. The diagnosis is made clinically, by your doctor. Migraine headaches can be eased by proper medications, before and during an attack. You should consult a neurologist.

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References in periodicals archive ?
After a comprehensive diagnostic workup, including laboratory tests, abdominal ultrasound, computed tomography scan and laparotomy failed to identify a source for the symptoms, thyroid function tests established the diagnosis of thyrotoxicosis.
Computed tomography scans of the chest (Plain) revealed dilated trachea measuring approximately 3 cm with dilated mainstem bronchi (Figure 1).
Five minutes after coronary angiography, a low-dose cardiac multidetector computed tomography scan was peformed on a Brilliance 64 scanner (Philips Medical Systems, Best, The Netherlands) using retrospective ECG-gating.
2a.: A computed tomography scan image a year later - increased right perinephric collection compressing the renal parenchyma and onset of a similar left perinephric water-density collection.
Methods: The retrospective study was conducted at the Aga Khan University Hospital, Karachi, and comprised computed tomography scans of 77 patients who had presented between October 2007 and March 2011.
3.: Abdomino-pelvic computed tomography scan (coronal A and axial B views): Red arrow points on subcutaneous fat stranding.
Fig.1.: A computed tomography scan demonstrating large multi-loculated urinoma surrounding the right kidney.
The radiologist recommended a computed tomography scan to rule out lung cancer, but the treating internists didn't order a scan or refer the patient for biopsy.
In-hospital evaluation included a chest X-ray, which showed bilateral interstitial infiltrates, a high resolution computed tomography scan consistent with alveolitis, normal spirometry with a decreased diffusing capacity for carbon monoxide, and nonspecific transbronchial biopsy findings.
1: Contrast-enhanced axial abdominal computed tomography scan: A 2.5-cm left lower pole renal mass is shown best on the delayed phase (arrow).
A computed tomography scan revealed damage to the cochleae.

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