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SELF-ADAPTIVE TRACKING AND PHASE ENCODING DURING DATA COLLECTION FOR CONTRAST-ENHANCED MRA
SELF-ADAPTIVE TRACKING AND PHASE ENCODING DURING DATA COLLECTION FOR CONTRAST-ENHANCED MRA
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机译:增强MRA数据收集过程中的自适应跟踪和相位编码
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摘要
A magnetic resonance imaging system (30) and method monitors signal intensity to detect or predict a peak contrast agent concentration in a region to be imaged. Reference images (58, 64) without a contrast agent and simulating the presence of a contrast agent provide a correlation between k-space signal intensity and contrast agent concentration. A peak contrast agent concentration is detected by comparing a received k-space signal intensity with frequency domain spectra calculated on the basis of the reference images (58, 64). When the monitored signal intensity of the acquired k-space data (54) indicates a peak contrast agent concentration in the imaged region, a sequence controller (46) automatically adjusts the phase encoding so that k-space data with zero or central phase encoding is immediately acquired.
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