Lowering radiation dose for coronary CT angiography (CCTA) exams

This article discusses how researchers assessed the use of low tube potentials for CCTA in worldwide clinical practice and the resulting influence on radiation exposure and image quality.

As reported by AuntMinnie staff writer Abraham Kim, “CCTA exams performed using low tube voltages (either 90 to 100 kVp or ≤ 80 kVp) were associated with reductions exceeding 50% for CT dose index (CTDIvol) and dose-length product, compared with the conventional tube-voltage range of 110 kVp to 120 kVp. These reductions led to statistically significant decreases in median radiation dose and volume of contrast agent required.”

Original research published in JACC: Cardiovascular Imaging,



Achieving appropriate radiation dose for coronary CT angiography

This is an interesting addition to the sophistication of systematic lowering of kVp during CT coronary angiography. Of course, such sophistication strongly supports 30% dose reduction without compromising diagnostic power.