Automated detection of bolus arrival and initiation of data acquisition in fast, three-dimensional, gadolinium-enhanced MR angiography |
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Authors: | TK Foo M Saranathan MR Prince TL Chenevert |
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Affiliation: | Applied Science Laboratory, GE Medical Systems, Bethesda, MD 20892-1061, USA. |
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Abstract: | Automatic triggering of magnetic resonance (MR) angiography with detection of a contrast material bolus was evaluated. Signal intensity changes with time were tracked in a prescribed tracking or monitoring volume by a parallel signal processing unit that automatically started data acquisition once user-defined thresholds were exceeded. This technique, referred to as MR Smartprep, was reliable and avoided the inconsistencies of manual timing. |
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