Abstract
The sharpness of the vessel contour in 3D contrast-enhanced MR angiography is defined by particular measurements of the signal intensity. To evaluate the facilities of an ECG-triggered data acquisition to optimize the MRA image quality of the thoracic aorta. In phantom studies the sharpness of the vessel contour was defined as the distance of the extraluminal signal-minimum to the extraluminal maximum. Afterwards 30 examinations of the thoracic aorta with and without the use of an ECG-triggering were evaluated with regard to the sharpness of the vessel outline. The presented definition of the signal intensity is suitable for objective measurements of the vessel outline. At the level of the ascending aorta, ECG-triggered data acquisition increased the image quality significantly. An easy, practicable definition enables measurements of the sharpness of the vessel outline. ECG-triggered data acquisition is recommended for optimal visualization, especially of the ascending aorta.
Published Version
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