Blood T1 value measurement in the left and right ventricles and aorta using postcontrast Look-Locker MR imaging at 1.5 T and 3.0 T: influence of location, heart rate, ejection fraction, and valvular regurgitation

Blood T1 value is measured to calculate extracellular volume of the myocardium, which correlates with the severity of fibrosis. The effects of location of ROI, cardiac function, and flow on the blood T1 value are concerned. We compared the blood T1 value between the left ventricle and right ventricle or aorta at a 1.5 T and 3.0 T. The relationship between the blood T1 value and heart rate, ejection fraction, or jet induced by valvular regurgitation was assessed. Blood T1 value can be measured at both ventricle using postcontrast Look-Locker MRI without concern about cardiac function and intraventricular flow.

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