X-ray diagnosis apparatus

An X-ray diagnosis apparatus comprising:

• an X-ray tube which generates X-rays;
• a detector which detects X-rays generated from the X-ray tube and transmitted through a subject;
• a C-arm which is equipped with the X-ray tube and the detector;
• an arm support mechanism which rotatably supports the C-arm;
• a top on which the subject is placed;
• a first moving mechanism which supports the C-arm or the top so as to change a relative positional relationship along a horizontal direction between the C-arm and the top;
• a second moving mechanism which supports the C-arm or the top so as to change a relative positional relationship along a vertical direction between the C-arm and the top;
• and
• a control unit which controls the arm support mechanism, the first moving mechanism, and the second moving mechanism so as to when a specific instruction is received from an operator, a perpendicular extending from a focus of the X-ray tube always intersects the top at a predetermined position thereon, a distance interval between the X-ray tube and the predetermined position is fixed, and the position of the focus is fixed in a space.

An X-ray diagnosis apparatus comprising:

• an X-ray tube which generates X-rays;
• a detector which detects X-rays generated from the X-ray tube and transmitted through a subject;
• a top on which the subject is placed;
• a C-arm which is equipped with the X-ray tube and the detector;
• an arm support mechanism which rotatably supports the C-arm;
• a moving mechanism which supports the C-arm or the top so as to change a relative positional relationship along a vertical direction between the C-arm and the top;
• an image processing unit which generates a long mask image by combining a plurality of mask images acquired via the detector, generates a long contrast image by combining a plurality of contrast images acquired via the detector, and generates a subtraction image based on the long mask image and the long contrast image;
• and
• a control unit which controls the arm support mechanism and the moving mechanism so as to fix a focus position of the X-ray tube, move the detector on an arc orbit at a predetermined distance from the focus position, and make imaging positions of the plurality of mask images and the plurality of contrast images differ from each other.