How is the procedure performed?

The technologist begins by positioning you on the CT examination table, usually lying flat on your back. Straps and pillows may be used to help you maintain the correct position and to help you remain still during the exam.

Electrodes (small, sticky discs) will be attached to your chest and to an electrocardiograph(ECG) machine that records the electrical activity of the heart. This makes it possible to record CT scans when the heart is not actively contracting.

Next, the table will move quickly through the scanner to determine the correct starting position for the scans. Then, the table will move slowly through the machine as the actual CT scanning is performed. Depending on the type of CT scan, the machine may make several passes.

Patients are asked to hold their breath for a period of 10 to 20 seconds while images are recorded.

When the examination is completed, you will be asked to wait until the technologist verifies that the images are of high enough quality for accurate interpretation.

The entire procedure including the actual CT scanning is usually completed within 10 minutes.

For an EBCT scan, you will lie on a table under an arch-shaped scanner. You may remain clothed and your head will not be enclosed at any time. During the scan, you will be asked to hold your breath at times to help you remain motionless. The procedure takes about 10 to 15 minutes, although the actual scanning time is only a few seconds.