Researchers using a newly approved advanced computed tomography (CT) system were able to significantly reduce radiation exposure in patients undergoing coronary CT angiography (CCTA), according to a new study published online in the journal Radiology.

CCTA is a valuable noninvasive imaging exam with high diagnostic accuracy. The exam is particularly effective and safe for the exclusion of significant coronary artery disease in patients arriving at the emergency department with acute chest pain. However, the clinical benefit of CCTA has been tempered by concerns of potential future cancer risk from the radiation exposure. Technologic advances have evolved to allow radiologists to not only reduce radiation exposure to the patient but also to improve image acquisition.

This study represents the initial coronary angiography results obtained with a prototype 320–detector row CT system recently approved by the US Food and Drug Administration. The new system holds several technical advantages over its first-generation counterpart, including a gantry rotation time of 275 milliseconds, wide volume coverage, iterative reconstruction, automated exposure control, and a larger x-ray power generator.