X-ray imaging apparatus and position determination support unit for X-ray imaging apparatus

An X-ray imaging apparatus, comprising:

• an X-ray irradiation element that irradiates an X-ray to a subject;
• an X-ray detection element that detects an X-ray irradiated from said X-ray irradiation element;
• an angular relationship detection element that detects a relative angular relationship between a detection surface of said X-ray detection element and an irradiation direction of said X-ray of said X-ray irradiation element;
• and
• a projection element that projects an irradiation position marker specifying a position where said X-ray is irradiated from said X-ray irradiation element on a body surface of said subject;
• wherein said projection element changes a display mode of said irradiation position marker projected on said body surface of said subject based on a deviation level relative to a preset setting angle of said angular relationship detected by said angular relationship detection element;
• and
• wherein said projection element is configured to individually and distinguishably change said display modes of a plurality of irradiation position markers corresponding to each of a plurality of deviation level relatives to said preset setting angles of a plurality of angular relationships in a plurality of rotation directions of said X-ray detection element.