A method for controlling a radiation emitting device comprising a radiation source that emits radiation to an imaging target, a collimator that sets a radiation field region, a visible light source that emits visible light, a stop that matches an irradiation range of the visible light on the imaging target with the radiation field region, imaging unit for capturing an image of the imaging target, a display unit that displays the image captured by the imaging unit, and a light irradiation switch that drives the visible light source, the method comprising:
- issuing a collimator driving command to direct the collimator to set the radiation field region determined from the captured image displayed by the display unit to the collimator in a case in which the light irradiation switch is operated.