CT and MRI in the Evaluation of Thoracic Aortic Diseases
Figure 3
Measurement of the aortic size in various MRI sequences; (a) 3D contrast enhanced MR angiography. The margins are blurred since the acquisition is not ECG gated. (b) Noncontrast 3D steady state free precession (SSFP) image has sharp margins due to ECG gating. (c) 2D SSFP cine image, which can be acquired throughout cardiac cycle, enabling measurement in systole or diastole. (d) T2-weighted black blood image, which is also acquired with ECG gating.
