Mihara H, Iriguchi N, Ueno S
University of Tokyo, Graduate School of Medicine, Japan.
MAGMA. 1998 Dec;7(2):115-20. doi: 10.1007/BF02592235.
A direct postprocessing method for correcting RF inhomogeneity in MR imaging is proposed. First, two images with different flip-angles of theta and 2theta are obtained. Next, the spatial distribution maps of the sensitivity of the surface coil and the B1 field intensity are produced by employing those images. Finally, the correction of the MR image is achieved, dividing the original image by distribution maps of the coil sensitivity and the B1 field intensity. The method was applied to images obtained by a gradient echo sequence and the corrected image is presented.
提出了一种用于校正磁共振成像中射频不均匀性的直接后处理方法。首先，获取具有不同翻转角θ和2θ的两幅图像。接下来，利用这些图像生成表面线圈灵敏度和B1场强的空间分布图。最后，通过将原始图像除以线圈灵敏度和B1场强的分布图来实现磁共振图像的校正。该方法应用于通过梯度回波序列获得的图像，并给出了校正后的图像。
