But the fact that centers were able to use at least one radiation-reduction technique in most patients "should serve as a wake-up call to cardiac CT laboratories that do not routinely use these methods, " Einstein writes in his editorial.

CNN: Heart test can pack radioactive wallop

Researchers further claim to have automatic noise reduction that safeguards detail through bilateral filtering, an established technique that uses brightness detection to avoid blurring edges.

ENGADGET: MIT imaging chip creates natural-looking flash photos Alt