Haishi T, Kose K
Institute of Applied Physics, University of Tsukuba, Tsukuba, 305, Japan.
J Magn Reson. 1998 Sep;134(1):138-41. doi: 10.1006/jmre.1998.1498.
A real-time NMR image reconstruction and display system was developed using a high-speed personal computer and optimized for the 32-bit multitasking Microsoft Windows 95 operating system. The system was operated at various CPU clock frequencies by changing the motherboard clock frequency and the processor/bus frequency ratio. When the Pentium CPU was used at the 200 MHz clock frequency, the reconstruction time for one 128 x 128 pixel image was 48 ms and that for the image display on the enlarged 256 x 256 pixel window was about 8 ms. NMR imaging experiments were performed with three fast imaging sequences (FLASH, multishot EPI, and one-shot EPI) to demonstrate the ability of the real-time system. It was concluded that in most cases, high-speed PC would be the best choice for the image reconstruction and display system for real-time MRI.
利用一台高速个人计算机开发了一种实时核磁共振成像重建与显示系统，并针对32位多任务的微软视窗95操作系统进行了优化。通过改变主板时钟频率和处理器/总线频率比，该系统可在不同的CPU时钟频率下运行。当奔腾CPU以200兆赫的时钟频率使用时，一幅128×128像素图像的重建时间为48毫秒，而在放大的256×256像素窗口上显示该图像的时间约为8毫秒。采用三种快速成像序列（快速低角度激发、多次激发回波平面成像和单次激发回波平面成像）进行了核磁共振成像实验，以证明该实时系统的能力。得出的结论是，在大多数情况下，高速个人计算机将是实时磁共振成像的图像重建与显示系统的最佳选择。
