COMPUTED TOMOGRAPHY

Computed tomography (CT), sometimes called a CAT scan utilizes a rotating x-ray source to obtain slice images through the body. Body exams require oral barium contrast or occasionally dilute iodinated contrast agent or just plain water. Intravenous iodinated contrast may also be required. Tissue characterization is far superior to x-ray or ultrasound and diagnostic yield generally superior.

Highly specialized CT applications available with latest-generation scanners include CT angiography, 3D image reconstruction, and "fly-through" virtual colonoscopy.

Like all x-ray procedures, CT scanning involves exposure to potentially harmful radiation. Radiation doses are lower than those used in some general x-ray exams but higher than in others. Damaging effects of radiation may be more of a risk when multiple CT studies are carried out over a period of time. In general, the benefits of CT scanning outweigh the potential harm from radiation.

X-ray dose varies from about 2mSv for a head CT to about 10mSv for a body exam, equivalent to 8 - 36 months average exposure to background radiation in nature. Notification of possible pregnancy is important to prevent fetal exposure, particularly in the 1st trimester when risk is greatest.

Contrast injection can cause a flush of heat and sometimes a metallic taste. These sensations usually disappear within a minute or two. Some people experience a mild itching sensation. If it persists or is accompanied by hives (small bumps on the skin), the itch can be treated easily with medication. In rare cases, a patient may become short of breath or experience swelling of the throat, indications of a more serious reaction that must be treated promptly. Fortunately the newest contrast materials are extremely safe and adverse effects are exceedingly rare.

CT Coronary Angiography

Scholtz and Partners also perform highly specialized imaging of the heart and coronary vessels at Netcare Montana, Mediclinic Midstream, Mediclinic Brits and Mediclinic Kloof