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US 7,726,879 B2Granted
X-ray imaging apparatus, control method for x-ray imaging apparatus, program, and storage medium
AssigneeCanon Kabushiki Kaisha
InventorsMasahiro Abe, Tsukasa Sako, Yuichi Nishii, Hideto Shiozawa
Life of this patent
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Abstract
An X-ray imaging apparatus includes a visible light imaging unit which captures an image of a visual field region with visible light, an X-ray irradiation unit which irradiates X-rays, an X-ray imaging unit which receives the irradiated X-rays and acquires a radiograph based on the X-rays, and a detection unit which detects an irradiated region irradiated with the X-rays based on the acquired radiograph.
Claims14
An X-ray imaging apparatus comprising:
- a visible light imaging unit adapted to capture an image of a visual field region with visible light;
- an X-ray irradiation unit adapted to irradiate X-rays;
- an X-ray imaging unit adapted to receive X-rays irradiated by said X-ray irradiation unit and acquire a radiograph based on the X-rays;
- a detection unit adapted to detect a region irradiated with the X-rays on the basis of a radiograph acquired by said X-ray imaging unit;
- a registration unit adapted to register position information of the irradiated region of an image of the visual field region in a still image shooting mode;
- a detection unit adapted to detect the presence/absence of a relative positional shift between said X-ray irradiation unit and said X-ray imaging unit by comparing position information registered by said registration unit with position information based on an irradiated region of a radiograph acquired during movie shooting of performing X-ray imaging of an object;
- and
- an irradiation control unit adapted to control irradiation of the X-rays by said X-ray irradiation unit based on a detection result obtained by said positional shift detection unit.
5 more elements
A control method for an X-ray imaging apparatus, the method comprising:
- a visible light capturing step of causing a visible light imaging unit to capture an image of a visual field region with visible light;
- an X-ray irradiation step of causing an X-ray irradiation unit to irradiate X-rays;
- an x-ray image capturing step of causing an X-ray imaging unit to receive X-rays irradiated in the X-ray irradiation step and acquire a radiograph based on the X-rays;
- a detection step of causing a detection unit to detect an irradiated region irradiated with the X-rays based on a radiograph acquired in the X-ray image capturing step;
- a registration step of causing a registration unit to register position information of the irradiated region of an image of the visual field region in a still image shooting mode;
- a positional shift detection step of causing a positional shift detection unit to detect the presence/absence of a relative positional shift between the X-ray irradiation unit and the X-ray imaging unit by comparing position information registered in the registration step with position information based on an irradiated region of a radiograph acquired during movie shooting of performing X-ray imaging of an object;
- and
- an irradiation control step of causing an irradiation control unit to control irradiation of the X-rays in the step of irradiating X-rays on the basis of a detection result obtained in the positional shift detection step.
5 more elements
Dependencies are inferred from the claim text.