Question

Cardiac CT images are typically acquired during which phase of the heart's cycle?

A. Systolic phase
B. Equilibrium phase
C. Diastolic phase
D. Ejection phase

Answer 1

Cardiac CT images are usually taken during the diastolic phase, which is when the heart is relaxed and the chambers are filling with blood.

Step-by-step explanation:

Cardiac CT images are typically acquired during the diastolic phase of the heart's cycle. This is the period of relaxation that occurs as the chambers fill with blood after contraction. During the cardiac cycle, systole is the period of contraction when the heart pumps blood into circulation, while diastole is when the heart relaxes. The ventricular ejection phase, which is the second phase of ventricular systole, is distinct from the phase used to acquire CT images, as it involves active pumping of blood from the ventricles.