抄録
MRI is a method which locates NMR（nuclear magnetic resonance）signal and creates an image. The method of the positioning is different from that of CT imaging.
Transmission and receive coils are used for handling electromagnetic wave in MRI. And 3-dimensionally independent three coils for application of gradient are equipped. One of the three coils is for slice selection of a patient, and the rest 2 coils are for locating signal on the 2-dimensional slice. This review explains the principle of image formation in MRI.
