| 摘要 |
In an X-ray imaging system having a detector and a tube disposed to project an X-ray beam field into the plane of the detector, visual indicators associated with the detector and the X-ray beam field, respectively, are provided for use in aligning the detector and beam field. A computational device is also provided for producing a signal representing offset, caused by X-ray beam angulation, between the geometric center of the beam field and the point at which the central axis of the projected X-ray beam intersects the detector plane. A displays device, responsive to the produced signal, enables a system user to compensate for the offset when aligning the detector and beam field.
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