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Figure 1 (A) Turbo FLASH (fast low angle shot) MR image shows contrast enhancement of the left atrium and the aorta after administration of gadolinium-DTPA. A region of interest (circle) for measurement of signal intensity is placed over the ascending aorta. (B) Diagram of relative signal intensity (rel. SI) in the ascending aorta over time after contrast agent administration. The contrast transit time is determined on the basis of the maximum (Max) of the curve. MR = magnetic resonance.
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