@article{oai:u-ryukyu.repo.nii.ac.jp:02015973,
 author = {山口, 慶一郎 and Yamaguchi, Keuchiro},
 issue = {1},
 journal = {琉球医学会誌 = Ryukyu Medical Journal},
 month = {},
 note = {Three types of quantitative measurement using MRI were summarized. The first type is the T2 calculated image which can be obtained from the proton-weighted image and the T2-weighted image. The normal T2 value in the frontal white matter is 65 msec, that in the posterior white matter is 73 msec, that in the putamen is 63 msec and that is in the posterior crus of the internal capsule 72 msec. These T2 calculated images are useful in case of diffuse white matter diseases and degenerative disease such as Creutzfeldt-Jakob disease. The second type is fat measurement. The principles of the Dixon method and The Three-point Dixon method were summarized and compared. The Three-point Dixon method presented a linear correlation between signal intensity and fat content in a phantom study. The Three-point Dixon method is useful not only for detecting fat deposition, but also for obtaining a fat saturation image. In addition, it may possess the capacity to measure the B_0 inhomogeneity image which can correct local shift due to the susceptibility effect. The last type is the fractal analysis of the cerebral gyrus. The surface images of the gyrus were obtained by the MIP (maximum intensity projection) method with the conventional T2 weighted images, and were used to obtain the fractal dimension. The dimension of an adult brain gyrus was 1.62 and that of a 23 week-old fetus was 1.31. This fractal analysis method is one of the methods used for the quantitative measurement of morphological analysis. These quantitative approaches using MRI might be powerful tools for diagnosis and treatment evaluation., 論文},
 pages = {3--9},
 title = {[総説］MRIを用いた定量診断},
 volume = {16},
 year = {1996}
}