Koh Dow-Mu, Takahara Taro, Imai Yutaka, Collins David J
CR UK Clinical Magnetic Resonance Research Group, Institute of Cancer Research and Academic Department of Radiology, Royal Marsden Hospital, Sutton, UK.
Magn Reson Med Sci. 2007;6(4):211-24. doi: 10.2463/mrms.6.211.
Diffusion-weighted magnetic resonance (MR) imaging (DWI) is increasingly applied to evaluate tumors in the abdomen and pelvis. However, DWI is susceptible to a variety of artifacts that arise from motion, use of strong gradient pulses, and echo-planar imaging technique. We discuss practical issues to help radiologists optimize the use of DWI to evaluate tumors in the body, including breath-hold DWI, multiple-acquisition non-breath-hold DWI, and diffusion-weighted whole-body imaging with background body signal suppression (DWIBS). Considerations of meticulous technique, sequence optimization, and quality assurance are emphasized for consistent acquisition of high quality images. We illustrate the potential use of these techniques to detect and characterize tumors and to monitor treatment effects.
扩散加权磁共振（MR）成像（DWI）越来越多地应用于评估腹部和盆腔肿瘤。然而，DWI容易受到多种伪影的影响，这些伪影源于运动、强梯度脉冲的使用以及回波平面成像技术。我们讨论了一些实际问题，以帮助放射科医生优化DWI在评估体内肿瘤中的应用，包括屏气DWI、多次采集非屏气DWI以及背景体部信号抑制扩散加权全身成像（DWIBS）。强调了细致的技术、序列优化和质量保证，以一致地获取高质量图像。我们举例说明了这些技术在检测和表征肿瘤以及监测治疗效果方面的潜在用途。
