What method involves scanning during the diastole phase of the heart cycle?

The method that involves scanning during the diastole phase of the heart cycle is Prospective ECG Gating. This technique takes advantage of the predictable nature of the cardiac cycle by synchronizing image acquisition with specific phases of the heart's rhythm. During the diastolic phase, the heart is more relaxed, which provides a clearer and less motion-affected image, making it an optimal time to capture detailed images of coronary arteries or cardiac structures.

Prospective ECG Gating begins scanning only at predetermined intervals, effectively reducing radiation exposure by limiting the acquisition of images to those moments when the heart is relatively still. This method is especially beneficial for cardiac imaging because it allows for high-quality images while minimizing motion artifacts that can occur during systole when the heart is contracting.

Other methods such as Retrospective ECG Gating involve continuously scanning throughout the entire cardiac cycle, allowing for selection of images later based on the ECG. Although this method can also capture diastolic images, it does not specifically target that phase for image acquisition like Prospective ECG Gating does. Pulse Sequence Imaging and Cardiac CT Angiography encompass broader imaging methodologies or techniques that may or may not focus specifically on the diastole phase, therefore, they are not the most direct answer for