Patent Number: 052356272
Section: claims

1. An X-ray diagnostic system comprising: an X-ray source including a movable X-ray diaphragm unit;  an X-ray camera unit for radiographing a patient as an object;  a holding means for holding the X-ray source and the X-ray camera unit in opposition and maintaining sufficient operating space between them;  a first seeking means for seeking an offset in an X-ray irradiated field said first seeking means comprising a first measuring device for measuring an angle of rotation of the arm around an axis of the patient to be X-rayed, a second measuring device for measuring an angle of rotation of the arm in a plane including the axis, and a third measuring device for measuring a distance SID; and  a control means for controlling the X-ray diaphragm unit according to an output of said seeking means.  the movable X-ray diaphragm unit includes a plurality of movable wings for limiting an X-ray irradiated field.  the controlling means is provided with a compensating table for calculating compensating amounts according to data from the seeking means.  the control means is further provided with a second seeking means for seeking compensating amounts experimentally according to data from the first seeking means and the offsets of the X-ray irradiated field.  the X-ray diaphragm apparatus includes four movable wings which form a rectangular aperture and can be moved to eliminate the offsets.  the X-ray diaphragm apparatus includes four movable wings which form a substantially circular aperture and can be moved to eliminate the offsets.  the X-ray diaphragm apparatus includes four movable wings which form a rectangular aperture and four movable wings which form a substantially circular aperture. 2. An X-ray diagnostic system as claimed in claim 1, wherein: 3. An X-ray diagnostic system as claimed in claim 2, wherein: 4. An X-ray diagnostic system as claimed in claim 3, wherein: 5. An X-ray diagnostic system as claimed in claim 1, wherein: 6. An X-ray diagnostic system as claimed in claim 1, wherein: 7. An X-ray diagnostic system as claimed in claim 1, wherein: