How Does a CT Or CAT Scan Work?

How Does a CT Or CAT Scan Work?

A CT or CAT scan produces cross-sectional images of the body. They were first developed by British engineers Dr. Alan Cormack and Sir Godfrey Hounsfield. Now, CTs are the mainstay for diagnosis of medical conditions. Both men and their team shared the 1979 Nobel Prize for advancing medicine. This technology allows doctors to visualize the inside of the body in great detail.

A CT scan requires that the patient lie flat on a table. Contrast dye is injected through an intravenous catheter. This can cause a metallic taste in the mouth or flushing. The machine is silent, and the patient remains motionless while the x-rays are taken. A CT scan can take several minutes. After the exam, the table will move out of the CT scanner.

A CT scan can take anywhere from 10 to 30 minutes. The duration varies depending on the amount of body part to be scanned and whether a contrast material is used. The scan may take longer than expected because the technologist needs to prepare the patient for the test. Once the CT imaging is complete, the doctor will review the images to make sure they are clear. If the images are not clear enough, more scans may be necessary.

The CT scanner is a large donut-shaped machine with a short tunnel in the center. The patient is placed on the table, and the gantry rotates around the patient. A separate control room houses the computer workstation where the technologist works. The technologist oversees the scan in direct visual contact with the patient, and also hears the patient’s breathing. Once the exam is complete, the radiologist will analyze the images to determine if anything else needs to be done.

A CT scan is a highly detailed image of the body, and is usually performed in a hospital. It is performed by a radiology technologist, who will use specialized equipment to perform the test. The patient will lie on a bed that moves in a doughnut-shaped machine. X-rays bounce around the patient’s body, making the images blurry.

The CT scanner is a large doughnut-shaped machine that has a thin flat table that slides into a hole in the middle. The table is placed on a rotating x-ray tube. The x-ray tube in the CT scanner sends out tiny x-ray beams that travel through the body and are detected by the opposite side of the machine. The machine may make a buzzing sound while the patient is on the table, or the technologist may talk to the patient.


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