X-ray diagnostic apparatus
AssigneesKabushiki Kaisha Toshiba, Toshiba Medical Systems Corporation
InventorNorimitsu Kosugi
Life of this patent
Estimating the term…
Abstract
When distance compute unit 81 received the instruction of the moving destination at the center of the exposure field 4a from center transfer operation unit 74, calculates the moving amount. Operating information processing unit 8 sends beam-limiting control unit 62 the calculated moving amount. Upside beam-limiting control unit 63 to right side beam-limiting control unit of beam-limiting control unit 62 makes the moving amount at the center of the exposure field 4a prescribed-times ((H1/H2) times in FIG. 3), calculates the moving amount of each diaphragm blade unit 51 in the upper part, the lower side, and the left part and the right part respectively.
Claims10
An X-ray diagnostic apparatus, comprising:
- a tabletop configured to support a subject;
- an X-ray tube configured to irradiate X-rays and disposed on one side of the tabletop;
- an X-ray detector configured to detect X-rays that penetrate the subject and disposed on the other side of the tabletop;
- four diaphragm blade units located between the X-ray tube and the tabletop, a first pair of diaphragm blade units configured to move antithetically in a longer direction of the tabletop, and a second pair of diaphragm blade units configured to move antithetically in a shorter direction of the tabletop, each of the four diaphragm blade units configured to form an exposure field on the X-ray detector;
- a beam-limiting drive unit configured to drive each of the four diaphragm blade units individually;
- a center transfer control unit configured to indicate a moving destination at a center of the exposure field;
- a beam-limiting control unit configured to receive information about a moving amount and a moving direction when the center of the exposure field moves, to control the beam-limiting drive unit to move each of the four diaphragm blade units individually, and to form the exposure field of the moving center that is concentric therewith;
- and
- an operating information processing unit configured to calculate the moving amount and the moving direction of the center of the exposure field when receiving an indication from the center transfer operation unit and to output the calculated moving amount and moving direction of the center of the exposure field to the beam-limiting control unit.
An X-ray diagnostic apparatus, comprising:
- a tabletop configured to support a subject;
- an X-ray tube configured to irradiate X-rays and disposed on one side of the tabletop;
- an X-ray detector configured to detect X-rays that penetrate the subject and disposed on the other side of the tabletop;
- four diaphragm blade units located between the X-ray tube and the tabletop, a first pair of diaphragm blade units configured to move antithetically in a longer direction of the tabletop, and a second pair of diaphragm blade units configured to move antithetically in a shorter direction of the tabletop, each of the four diaphragm blade units configured to form an exposure field on the X-ray detector;
- a beam-limiting drive unit configured to drive each of the four diaphragm blade units individually;
- an imaging system drive unit configured to drive the tabletop, the X-ray tube, and the X-ray detector, respectively, so that a detection range of X-ray detector is relative to movement in the longer direction and the shorter direction of the tabletop;
- an aperture information holding unit configured to hold aperture information about the longer direction of the tabletop and aperture information about the shorter direction of the tabletop;
- a center transfer operation unit configured to indicate the moving direction of a center of the exposure field;
- and
- a judgment unit configured to judge whether part or all of the exposure field exceeds the detection range of the X-ray detector or part or all of the exposure field enters an operation switching area formed at an edge of the detection range based on a moving amount and a moving direction information about the center of the exposure field and the aperture information held in the aperture information holding unit.
Dependencies are inferred from the claim text.