This technology provides a noninvasive method to visualize the coronary arteries using a small dose of contrast. You will be referred out for this test to a radiology lab.
The new 64-slice multidetector CT scanner allows providers to analyze coronary artery lesions as well as blockages that were previously impossible to visualize.
CT gathers multiple images, which acquires great amount of diagnostic information in a shorter amount of time. Unlike traditional x-ray imaging that produces a 2-D projection, CT takes thin x-ray scans from multiple directions.
These multiple scans can be combined to create a 3-D image or volume. CT is used for 3-D volume imaging of the heart.
How to prepare for your test:
For coronary CTA, a recent blood test for kidney functions and a ordering form is required for this test. Patients with kidney malfunction, asthma, diabetes, allergies to x-ray contrast, irregular heart rhythms or a pacemaker or implantable defibrillator will be given further individual evaluation and special instructions. To obtain high quality images with CTA many individuals require administration of a beta-blocker prior to the test to keep their heart rates under 70 beats per minute.