Advanced CT scans are useful in figuring out whether or not patients facing chest pains need cardiac angioplasty or bypass surgery to address blood flow blockage, according to a new study. Scientists were to present the findings at the European Society of Cardiology Congress in Munich on Aug. 28. Scientists said the results showed that such a scan could help prevent unnecessary procedures for people who suffer chest pains, but don't have any sort of blockage requiring surgery. The test was detailed and thorough and created less radiation exposure for patients than the traditionally used angiogram and nuclear medicine stress tests combined, the researchers said. Johns Hopkins University School of Medicine worked with Toshiba to develop the scanner used in the study, called the 320-detector. Release