[Basic principles of magnetic resonance imaging].
With rapid progress in MR imaging techniques, it has now become one of the important clinical imaging techniques. In this paper, the basic principles of NMR and MR imaging techniques are briefly described. Furthermore, the technical background of principal MR imaging techniques such as the spin-echo, gradient-echo, fast spin-echo and ultra-fast MR imaging technique is reviewed. The principles of proton density-, T1- and T2-weighted contrast images are also described. Finally, the technical background of functional MR imaging is briefly reviewed and the typical fMR image obtained by activation of motor cortex with finger tapping is presented.
Tanaka
K
K
Central Laboratory for Research and Education, Asahikawa Medical College.
D001921:Brain / Q000033:anatomy & histology; D001330:Electronic Data Processing; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*