Doyle M, Walsh E G, Foster R E, Pohost G M
Department of Medicine, University of Alabama at Birmingham 35294-0012, USA.
Magn Reson Med. 1997 Mar;37(3):410-7. doi: 10.1002/mrm.1910370319.
A variety of variable and constant rate, sparse sampling strategies have previously been proposed to rapidly image dynamically changing objects. The majority of these strategies compile a k-space data set for any given time point by substituting k-space data from the most recently sampled time positions (extracted from the sparsely sampled set). The BRISK technique, is a variable rate, sparse sampling technique which additionally incorporates an interpolation scheme to more accurately represent k-space data at positions which were not directly sampled. Here, strategies are introduced that allow tubo concepts to be incorporated with BRISK. Simulations are conducted to compare the efficacy of the turbo BRISK acquisition and processing strategy against a constant rate, sparse sampling strategy with direct substitution of the most recently acquired k-space lines. It is shown that turbo BRISK generates images of similar quality in approximately half the time as the uniform sampling rate, sparse sampling strategy. Data from turbo BRISK acquisitions of multicardiac phase image sets, obtained on a normal volunteer and cardiac patients are presented.
此前已提出多种可变和恒定速率的稀疏采样策略，用于对动态变化的物体进行快速成像。这些策略中的大多数通过替换最近采样时间位置（从稀疏采样集中提取）的k空间数据，为任何给定时间点编译一个k空间数据集。BRISK技术是一种可变速率的稀疏采样技术，它还采用了一种插值方案，以便更准确地表示未直接采样位置的k空间数据。在此，引入了一些策略，使tubo概念能够与BRISK相结合。进行了模拟，以比较turbo BRISK采集和处理策略与直接替换最近采集的k空间线的恒定速率稀疏采样策略的效果。结果表明，turbo BRISK生成的图像质量相似，但所需时间约为均匀采样速率稀疏采样策略的一半。展示了在一名正常志愿者和心脏病患者身上获得的多心脏相位图像集的turbo BRISK采集数据。
