Development of Computerized Scheme for Automated Adjustment of Display Grayscale in Diffusion-Weighted Magnetic Resonance Images with Acute Ischemic Stroke

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Diffusion-weighted magnetic resonance images (MRI-DWI) are used to evaluate patients with acute ischemic stroke. The display grayscale in MRI-DWI are adjusted under manual operation of the radiologist. The difference in the display grayscale between observers may cause the deterioration of the accuracy in diagnostic imaging. The method for standardizing the display grayscale in MRI-DWI was devised by study group of the Ministry of Health, Labour and Welfare. However, the proposed method might cause human errors, and is time-consuming. In this study, the computerized scheme for automated standardization of display grayscale in MRI-DWI was developed. This computerized scheme was able to standardize in high accuracy the display grayscale in a lot of MRI-DWI of patient obtained with different scanners.