CT Scan

Computed Tomography is an advanced system producing images of the body much like the slicing of a loaf of bread. It is a highly sensitive method to accurately view the internal anatomy and detect extremely small lesions. Utilizing high speed computers, the CT obtains 360 degrees of X-Ray information. This is processed into single slice images for display on a monitor and can be reproduced on film or high quality photographic paper.

Our GE Light Speed Plus CTs with helical scanning capability significantly shorten examination time and reduce the volume of intravenous non-ionic contrast material administered while providing exceptional resolution. During a single breath hold, helical scanning produces multiple contiguous slices so that extremely small lesions are not obscured. These features enhance diagnostic sensitivity, earlier detection, and consistent follow-up of pathology while allowing improved patient comfort. East River is ACR Accredited to perform CT studies.

During the scan, you will be asked to rest motionless on a padded table for 5 to 15 minutes depending on the area to be scanned. The table moves every few seconds as the images are obtained. You will hear faint humming and clicking sounds. After the images are taken, a radiologist will review the images to make sure all of the area has been covered. Because of breathing or motion inside the body, additional images are sometimes needed. Additional images do not mean there is a problem.

Depending on the part of the body being scanned, different contrast materials are used. Contrast is often administerd through the vein (intravenous). The contrast we use is non-ionic iodinated contrast. Even though this is significantly more expensive than other ionic contrasts, it has been clearly shown to cause less side effects. We only use non-ionic contrast. No additional cost is incurred to the patient, even though insurance companies will not reimburse for this. Although reactions are quite rare, it is not unusual to get a flush feeling during the exam or a metallic taste in the mouth. This typically lasts for less than a minute. This is necessary to allow adequate filling of the intestines, which helps in the proper interpretation of the study.

If you have an iodine allergy or have had a reaction to contrast in the past, you should notify the office when you are making the appointment, and also at the time of the scan, so that we can take additional precautions to avoid a problem. If you are taking a diabetic medication called Glucophage, please alert us at the time of your appointment, as this may react with the IV iodine and result in kidney problems.

Oral contrast is usually given for CT scans that include the abdomen and pelvis. The oral contrast is swallowed and courses throughout the gastrointestinal tract. The intestines then appear white on the CT images.

Two types of substances serve as oral CT contrast. Barium sulfate is similar in consistency to a milkshake. Gastrograffin is a water-based drink containing iodine and is generally mixed with fruit juice. Patients usually need to drink about 32 oz. of either contrast to adequately fill the stomach and intestines. Minor side effects such as constipation or diarrhea may occur.

For CT examinations that include the pelvis, you will be asked to arrive an hour before the actual scan time to drink. For a CT scan of the abdomen you will be scheduled to arrive a half hour before scanning. This is necessary to allow adequate filling of the intestines, which helps in the proper interpretation of the study. You will be seated in our waiting room during this period. Reading material will be available, however, feel free to bring your own.

Screening examinations have become important parts of healthcare, utilized to detect disease before they become clinically problematic. Currently, Screening Chest CT for the early detection of lung cancer and Coronary Artery Calcium Scoring for detection of asymptomatic heart disease are simple non-invasive exams that we perform in our facility.

CT Preparation Instructions