clipped from: www.mail.com   
By MARILYNN MARCHIONE

A type of "super X-ray" showed promise in its first big test as a potentially cheaper, faster and painless way to find out whether certain people with signs of heart disease actually have it and need treatment. The scans might eliminate the need for some of the 1.3 million cardiac catheterizations done each year in the United States to check for clogged arteries, said Dr. Julie Miller of Johns Hopkins University

But the newer scans are controversial:
many heart specialists oppose them, partly because they supply a big dose of radiation. That raises the risk of cancer
and might spur thousands of additional cases if the scans were widely used in the population, said Dr. Michael Lauer

This new CT scan technology came on the market two years ago and is already used by many hospitals. Because it uses 64 detectors to produce and combine images, the scans are called "64-slice CT." The images are so detailed that one doctor described them as an almost surgical view.