Doyle M, Walsh E G, Blackwell G G, Pohost G M
Department of Medicine, University of Alabama at Birmingham 35294-0012, USA.
Magn Reson Med. 1995 Feb;33(2):163-70. doi: 10.1002/mrm.1910330204.
We introduce an acquisition method, "block regional interpolation scheme for k-space" (BRISK), to reduce the acquisition time for cardiac imaging. The method exploits the high degree of correlation that exists between time-resolved cardiac images. For representative k-space data sets, Fourier analysis was applied along the cardiac phase dimension to reveal that different regions of k-space can be effectively sampled at different rates. A reduced sampling strategy was implemented, and unsampled points were generated by Fourier interpolation. Time savings of up to 75% are quite feasible and 25% BRISK scans compare well with 100% scans. Simulations and acquisitions using a normal volunteer and patients are presented.
我们引入了一种采集方法，即“k空间的块区域插值方案”（BRISK），以减少心脏成像的采集时间。该方法利用了时间分辨心脏图像之间存在的高度相关性。对于具有代表性的k空间数据集，沿着心脏相位维度进行傅里叶分析，以揭示k空间的不同区域可以以不同的速率进行有效采样。实施了减少采样策略，并通过傅里叶插值生成未采样点。节省高达75%的时间是非常可行的，25%的BRISK扫描与100%的扫描效果相当。文中展示了使用正常志愿者和患者进行的模拟和采集结果。
