As for this invention, in inspection area of inspection object ones spatial distribution of magnetic particle,a), the step which forms the magnetic field where it has the spatial distribution of strength of the kind of magnetic field which consists of with the 1st part area which has the strength of the magnetic field where the aforementioned inspection area is low and the 2nd part area which has the strength of the high magnetic field,b) it changes especially the relative spatial position of two part areas in the aforementioned inspection area, in order or for magnetization of the aforementioned particle to change locally, the step which changes the strength of the magnetic field in the aforementioned 1st part area,c) the step which acquires the signal which depends on the magnetization in the aforementioned inspection area which receives influence with this change, andd) change of spatial distribution of the magnetic particle in the aforementioned inspection area and/or the step which appraises the aforementioned signal in order to obtain the information regarding motionIt regards the method of deciding of making use. The aforementioned magnetic particle the casing which exists at least in one capsule or has especially thin film coating, especially it is diluted, or or the especially leucocyte or the red corpuscle, the immunity cell, in the cell the tumor cell or the trunk cell like, or the raw materials and the medicine, with powder type, or the outrider physical type of the especially liquid which are connected to the antibody or the living thing, throwing and/or it exists in the area of the inspection in the suspended material or the aerosol. This invention furthermore the composition of the magnetic particle which has the image pickup quality which is improved, regards the dosage composition which differs variously the magnetic particle is prescribed to the inspection area, and the method of prescribing the magnetic particle.本発明は、検査対象物の検査エリアに磁性粒子の空間分布を、a)前記検査エ
