Invention Grant
US07974679B2 Method and apparatus to reduce image intensity variation during MR data acquisition 有权
降低MR数据采集过程中图像强度变化的方法和装置

Method and apparatus to reduce image intensity variation during MR data acquisition
Abstract:
The present invention provides a system and method of reducing image intensity variations during imaging acquisitions that utilize large encoding gradient pulses that are played out immediately before a center of k-space is sampled. The present invention includes an acquisition and sampling that implements a predetermined delay in sampling prior to sampling the center of k-space. The delay in sampling the center of k-space following sampling of a peripheral region of k-space maintains the steady state of the MR signal and reduces the image intensity variation caused by eddy current and gradient hysteresis. As such, the intensity variations throughout k-space may be reduced substantially and brought closer to the intrinsic noise level of the data acquisition.
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