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To evaluate the effect of flip angle on flow rate measurements obtained with phase contrast MRI according to the flip angle degree in ascending aorta and velocity encoding (VENC) was (150 m/s). 1.5T MRI in patients 17 (female: 8, male: 9, mean age 57.9 ± 15.4) as a target by applying a non-breath holding techniques to flip angle VENC (150 cm/s) in each of the ascending aorta was measured by changing 20o, 30o and 40o. Blood was obtained a peak velocity, average velocity, net forward volume, net forward volume/body surface area. Ascending aorta from average velocity (AV) measured the average value of the flip angle 20o (9.87 cm/s), 30o (9.6 cm/s) and 40o (10.05 cm/s). Blood flow VENC in was blood flow change in flip angle change was high most blood flow measurement when the flip angle 30o in VENC, crouching each blood flow is also proportional to the increases in the 20o to 40o and was increased, the deviation of the peak velocity and the average velocity is the smallest deviation from the flip angle 30o. Flip angle 20o, 30o and 40o in peak velocity, average velocity, net forward volume, net forward volume/body surface area was no statistically significant difference (p > .05). Blood flow velocity and blood flow is measured by applying to adjust the flip angle accurately calculate the blood flow is important information for diagnosis and treatment of cardiovascular diseases, and can help in the examination on the blood flow measurement.

Blood Flow Measurement with Phase Contrast MRI According to Flip Angle in the Ascending Aorta