PURPOSE: To shorten the photographing time for moving body photographing which uses synchronization by setting a repeat time for applying a high frequency pulse at the time of measuring a signal to the shorted time, and also, dividing a projection into plural sets, and executing continuously photographing of one set of projection within one period.

CONSTITUTION: In an electrocadiographical synchronization photographing method, usually an R wave becomes a trigger and after a prescribed delay time, photographing is started. Also, the time when a motion of the head seems to stand still is for about 40ms, and when photographing of 8ms repeat time is executed, photo. graphing of five projections can be executed simultaneously. Photographing of the whole can be completed by 13 periods and 26 periods, in the case of photographing of 64 projections as a whole and 128 projections, respectively. Usually, an R wave-R wave interval is about 1000ms, and photographing is finished by 13 seconds and 26 seconds in the case of 64 projections and 128 projections, respectively. On the other hand, in the case of a multi-time phase photographing method, when it is assumed that it takes 40ms for one set of photographing, photographing of 25 sets can be executed in the R wave-R wave of about 1000ms.