X-ray diagnosis apparatus and control method thereof

An X-ray diagnosis apparatus comprising:

• an X-ray irradiation device configured to irradiate an object with an X-ray, the device including an X-ray source configured to generate an X-ray and a movable aperture device configured to form an X-ray irradiation field;
• an X-ray detection device disposed to be opposed to the X-ray irradiation device and configured to detect the X-ray;
• a retainer configured to retain the X-ray irradiation device and the X-ray detection device;
• a bed system provided between the X-ray irradiation device and the X-ray detection device, and configured to place an object thereon;
• a radiography image generation unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a radiography image as a static image by using a radiography irradiation field as the X-ray irradiation field;
• a fluoroscopy image generation unit configured to control the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a fluoroscopy image as a dynamic image by using a fluoroscopy irradiation field as the X-ray irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field;
• a display control unit configured to generate a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and to display the superimposed image on a display device;
• and
• an irradiation field changing unit configured to enlarge/contract the fluoroscopy irradiation field with a fluoroscopy irradiation field center as a center, while the superimposed image is displayed.

A control method for an X-ray diagnosis apparatus including:

• an X-ray irradiation device configured to irradiate an object with an X-ray, the device including an X-ray source configured to generate an X-ray and a movable aperture device configured to form an X-ray irradiation field;
• an X-ray detection device disposed to be opposed to the X-ray irradiation device and configured to detect the X-ray;
• a retainer configured to retain the X-ray irradiation device and the X-ray detection device;
• and
• a bed system provided between the X-ray irradiation device and the X-ray detection device, and configured to place an object thereon, comprising:
• controlling the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and to generate a radiography image as a static image by using a radiography irradiation field as the X-ray irradiation field;
• controlling the X-ray irradiation device, the X-ray detection device, the retainer, and the bed system, and generating a fluoroscopy image as a dynamic image by using a fluoroscopy irradiation field as the X-ray irradiation field, the fluoroscopy irradiation field being narrower than the radiography irradiation field;
• generating a superimposed image in which the fluoroscopy image is superimposed on a part of the radiography image, and displaying the superimposed image on a display device;
• and
• changing the fluoroscopy irradiation field with the superimposed image being displayed.