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Real-time imaging and triggering of 3D contrast-enhanced MR angiograms using MR fluoroscopy

✍ Scribed by Riederer, S

Publisher
Springer
Year
1999
Tongue
English
Weight
233 KB
Volume
8
Category
Article
ISSN
0968-5243

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✦ Synopsis

Although a variety of timing techniques and data acquisition strategies have been used for three-dimensional contrast-enhanced MR angiography, many are still limited by inadequate overall reliability, limited spatial resolution, or complexity. A technique is presented in this work in which contrast arrival is detected in the targeted vasculature in real time using MR fluoroscopy. Upon detection the operator triggers a 3D MR angiographic acquisition which uses an elliptical centric view order. It is shown that the view order intrinsically provides a high degree of venous suppression which in turn allows acquisition times of 30 s or longer, permitting high spatial resolution. The reliability of fluoroscopic triggering in bolus detection is shown to be over 90%. The technique provides high quality contrast-enhanced MR angiograms for many vascular regions.

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