Contrast-enhanced MRA including an effective zero-latency method of bolus detection
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United States of America Patent
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Oct 28, 2003
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app pub date -
Nov 22, 2000
filing date -
Nov 22, 2000
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Abstract
To generate a magnetic resonance angiograph, a patient is injected with a contrast-enhancing agent (210). An ellipsoidal central portion of k-space (300) and a first surrounding region (310) are continuously sampled (220). A portion of each central data set (300, 310) is reconstructed (230) into a low-resolution volume and maximum-intensity-projected (240) onto a line. The maximum intensity projection (240) is processed (250) in order to detect the arrival of the contrast enhancing bolus within a volume of interest. Upon detection of the arrival of the bolus, the acquisition of a high-resolution magnetic resonance angiograph is triggered (260) in which higher phase encode portions (310, 420) of k-space are sampled. The central data set (300) along with the higher phase encode views (310, 420) are reconstructed (290) into a high-resolution magnetic resonance angiogram. The present technique allows for substantially zero latency between the detection of the contrast-enhancing agent bolus and the acquisition of the magnetic resonance angiogram.
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