Beavis A W, Gibbs P, Dealey R A, Whitton V J
Department of Radiation Physics, Royal Hull Hospitals NHS Trust, UK.
Br J Radiol. 1998 May;71(845):544-8. doi: 10.1259/bjr.71.845.9691900.
MRI of the brain can provide images of very high quality revealing detailed information especially concerning the extent of abnormalities. As such MRI has great potential in the radiotherapy (RT) planning of brain tumours. However MRI has rarely been used alone as the basis for treatment planning primarily due to concern over potential geometric distortions. Treatment planning using MRI has therefore usually been carried out in conjunction with CT images. This work demonstrates that geometric distortions can be minimized by using a relatively small field-of-view, an increased receiver bandwidth, and a fast spin echo acquisition sequence, and that it is thus possible to perform RT planning using MRI.
脑部磁共振成像（MRI）能够提供高质量图像，揭示详细信息，尤其是关于异常情况的范围。因此，MRI在脑肿瘤放射治疗（RT）计划中具有巨大潜力。然而，MRI很少单独用作治疗计划的基础，主要是因为担心潜在的几何畸变。因此，使用MRI的治疗计划通常与CT图像结合进行。这项工作表明，通过使用相对较小的视野、增加的接收器带宽和快速自旋回波采集序列，可以将几何畸变最小化，从而有可能使用MRI进行RT计划。
