Exam Preps

CT Scan

The CT Scan is a primary tool for diagnostic medicine. Popularly called “CAT Scan,” it employs a unique design of x-ray technology coupled with constantly advancing computer technology. It allows rotation of 360 degrees of exposure around the human body.

This scanning method provides the physician with a two-dimensional "slice" of a designated target area in the patient's body as positioned on the examining table. Details and structure of the interior of the body can be mathematically reconstructed from the projections obtained from various angles. In the computerized tomography views are taken in a single plain, data is computed and displayed as a cross-sectioned image.

These images from the x-ray exposures are then recorded and stored in the computer. Data may then be reconstructed and the brightness of each portion of the cross-section is determined by x-ray absorption. The images taken may be displayed, recorded on film or stored for later review.

Basic CT Scan shows the area covered on a single frame. If areas needs examination the patient and the table are moved accordingly. This process is called "incremental" scanning and it limits the frames to specific sections as chosen. It is generally time consuming due to the multiple adjustments that are needed with both patient and equipment.

Exam Preps

• Patients should continue any prescription medications unless informed otherwise by their physicians.
• Diabetic patients are advised to speak with their physicians concerning discontinuing the use of Glucophage for 48 hours after a CT scan with contrast enhancement.
• Diabetic patients should maintain diet as prescribed by their physician.
• Do not eat/drink anything three hours prior to drinking Readi-Cat barium.

*** If instructions are not followed closely, exam may need to be rescheduled***

SHAKE WELL BEFORE USING

• Drink one container of Readi-Cat barium two hours before your appointment time.
• Drink entire container within a thirty-minute time period.
• Drink second container of Readi-Cat barium one hour before your appointment time. Drink entire container within a thirty-minute time period. (For example, if your appointment is at 10:00 a.m., drink 1st bottle at 8:00 a.m. and 2nd bottle at 9:00 a.m.) You should have consumed all Readi-Cat barium by thirty minutes prior to your examination.
• Arrive at the facility thirty minutes prior to your appointment time.

If you have questions regarding this prep, please call
(210) 617-9000 between 7:00 a.m. and 7:00 p.m.

For AM Exam

• Nothing to eat or drink after midnight.

For PM Exam

• Clear liquids for breakfast (nothing to eat or drink after).