PURPOSE: To more frequently change a projection direction by calculating the image information projected from a designated angle direction and displaying the calculated image information.

CONSTITUTION: By driving the inclined magnetic field power source 10 of each coil in accordance with the instruction from a sequencer 7, the inclined magnetic fields Gx, Gy and Gz of the three axes directions of X, Y And Z are impressed on an examinee 1. By the adding ways of these inclined magnetic fields, the slice surface for the examinee 1 can be set. A signal processing system 6 is composed of a CPU 8, the recorder of a magnetic disk 18 and a magnetic tape 19, etc., and the display 20 of a CRT, etc. In the CPU 8, processings such as a Fourier transform, etc., are performed, proper calculations are performed for the signal intensity distribution of an arbitrary section or plural signals, the obtained distribution is visualized and the distribution is displayed as a tomographic image on a display 20. This device is provided with a track ball 30 and the tomographic image can be visualized by rotating the tomographic image in an arbitrary direction by the operation of the track ball 30.