CT Scan

Computerized Axial Tomography – CT

Computed Tomography (CT), is an advanced x-ray technology that produces a sequence of detailed cross-sectional images of the interior of the head, spine, chest, abdomen, pelvis or other areas of the body. The complex images are produced with the aid of a computer by rotating a focused x-ray beam around the patient and capturing images from numerous angles. CT examinations produce detailed organ studies by capturing multiple individual image “slices” which are then viewed in a series-like manner by a radiologist.

CT angiography (CTA), can assess the status of both the large arteries and veins in most parts of the body, including the brain. During a CTA, dye is injected into a vein through an IV and as the dye circulates from the veins into the arteries, images of the vessels are captured. CT angiography is considered less invasive than a traditional angiogram.

Your CT Exam

Some CT procedures require that you do not eat or drink prior to the examination. Prescribed medications may be continued unless you have been instructed otherwise. If you are diabetic, you may need to delay your medication until you can resume eating. If this is concerning, please speak with your physician.

If you are having a CT of the abdomen or pelvis, you may be asked to arrive up to 2 hours prior to your exam to drink an oral contrast. You may also pick up the oral contrast material at our Ponahawai Clinic in Hilo or our HRA West clinic in Kona, the day before your exam. In addition, do not eat or drink for 4 hours prior to the exam. You may have small amounts of water, if needed, to take medications only. You should remain as still as possible to produce the clearest images and you may be asked to do short breath-holds during portions of the exam.