A method for controlling an X-ray imaging apparatus including an X-ray detector configured to detect X-rays generated from an X-ray source and operable in a plurality of driving states, including an imaging preparation state in which photoelectric conversion element initialization processing is performed, an imaging permissible state in which the initialization processing is not permitted and in which an imaging start instruction is waited for, and an imaging-in-progress state which is a state of currently performing imaging, the method comprising:
- causing a transition of a driving state of the X-ray detector in accordance with an imaging mode selected from a plurality of imaging modes that are differentiated in combination of driving state of the X-ray detector and period of time during which a user exposure operation is permitted, and
- notifying whether or not the driving state of the X-ray detector is in a permission period in which the exposure is permissible in the selected imaging mode.