Brown D G, Riederer S J, Wright R C, Liu Y, Farzaneh F
Department of Diagnostic Radiology, Mayo Clinic, Rochester, Minnesota 55905.
Magn Reson Med. 1990 Sep;15(3):475-82. doi: 10.1002/mrm.1910150314.
We describe a system which forms MR angiographic images at high speed. Multiple axial sections are imaged sequentially using a 2DFT GRASS sequence with TR/TE 50/15 ms, 64 phase encodings per image. Reconstruction and projection of each image are performed immediately (within 220 ms) after data for that image are acquired. The projection angiogram is constructed line by line as the scan progresses, thereby totally eliminating any additional time required for reconstruction and projection.
我们描述了一种能够高速生成磁共振血管造影图像的系统。使用具有TR/TE为50/15毫秒的二维傅里叶变换稳态进动梯度回波序列（2DFT GRASS序列）对多个轴向切片进行顺序成像，每个图像有64个相位编码。在获取某一图像的数据后，立即（在220毫秒内）对该图像进行重建和投影。随着扫描的进行，逐行构建投影血管造影图，从而完全消除了重建和投影所需的任何额外时间。
