According to Reuters

CHICAGO - Radiation from CT scans done in 2007 will cause 29,000 cancers and kill nearly 15,000 Americans, researchers said Monday.

The findings, published in the Archives of Internal Medicine, add to mounting evidence that Americans are overexposed to radiation from diagnostic tests, especially from a specialized kind of X-ray called a computed tomography, or CT, scan.

CT scans are given for a variety of health reasons, including neck and back pain. Their use in medical care has all but exploded in the last 25 years, going from 3 million scans in 1980 to 70 million in 2007. They are here to stay, but the study warns against over reliance on this potentially risky exam.

A new research found patients reporting new low-back pain are more likely to undergo surgery if treated in an area with a higher-than-average concentration of MRI machines. It came from Stanford University School of Medicine.

MRI scan have found increased surgery rates don't improve patient outcomes,according to previous studies.

The study analyzed records from patients who received treatment for their lower back, and compared the data to the number of MRI machines in their area. Areas were divided by level of MRI availability, and the rates of MRI scans and surgeries were determined.

So,take care! Nothing is perfect.