Gmitro A F, Ehsani A R, Berchem T A, Snell R J
Department of Radiology, University of Arizona, Tucson 85724, USA.
Magn Reson Med. 1996 May;35(5):734-40. doi: 10.1002/mrm.1910350515.
A digital-electronic reconstruction system for MRI has been designed and demonstrated. The system is capable of reconstructing a 128 x 128 pixel image from complex-valued data in approximately 8 ms (122 frames per second) or a 256 x 256 pixel image in 32 ms (30 frames per second) using the standard 2D FFT reconstruction algorithm. Real-time MR imaging can be obtained when this reconstruction system is coupled with fast continuous echo-planar type data acquisition. This provides the unique potential for real-time monitoring of interventional procedures or for rapid patient positioning. The real-time reconstruction system presented here consists of four main subsystems: an analog to digital converter, an interface memory, the Fourier processor, and the display processor. The basic design of this reconstruction system is presented along with results, demonstrating the capability of the system.
已设计并展示了一种用于磁共振成像（MRI）的数字电子重建系统。该系统能够使用标准的二维快速傅里叶变换（2D FFT）重建算法，在大约8毫秒内（每秒122帧）从复数值数据重建出128×128像素的图像，或者在32毫秒内（每秒30帧）重建出256×256像素的图像。当该重建系统与快速连续回波平面型数据采集相结合时，可获得实时磁共振成像。这为介入手术的实时监测或患者的快速定位提供了独特的潜力。这里介绍的实时重建系统由四个主要子系统组成：一个模数转换器、一个接口存储器、傅里叶处理器和显示处理器。本文介绍了该重建系统的基本设计及其结果，展示了系统的能力。
