A single CT scan is the equivalent of hundreds of chest X-rays—leading some experts to view the widely used procedure as a dangerous medical gamble. This program offers detailed information on radiation screening tests, their benefits, and hazards they may pose to individuals with certain medical profiles. The complexity of the issue emerges in the stories of three women: Kyla, whose thyroid cancer may be the result of frequent X-ray imaging; Paula, who suffers from life-threatening heart disease caused by childhood radiation treatments; and Jo-Ann, a CT scan recipient who must now consider skipping regular mammograms—because of physician advice to avoid excess radiation. (48 minutes)