Automatic Computation of Signal-to-Noise Ratio for Magnetic Resonances Images

摘要

An automatic method to measure the signal-to-noise ratio of images is proposed. The region of interest in a phantom image is reliably determined by the image contour by the Sobel operator. With these data, the signal-to-noise ratio was computed using two phantom images. Results showed very good agreement with those reported in the literature. This scheme can be implemented in line to save a great deal of effort and time when assessing the performance of RF coils, BO uniformity, image quality, etc.