초록 ▼

An x-ray source (30) transmits a beam of x-rays through an examination region (E). A detector (28), in an initial spatial orientation relative to the source, receives the beam and generates a view of image data indicative of the intensity of the beam received. A first accelerometer (40), capable of

An x-ray source (30) transmits a beam of x-rays through an examination region (E). A detector (28), in an initial spatial orientation relative to the source, receives the beam and generates a view of image data indicative of the intensity of the beam received. A first accelerometer (40), capable of generating acceleration data in at least one dimension, is associated with the detector. A second accelerometer (42), capable of generating acceleration data in at least one dimension is associated with the source. A position calculator (60) mathematically calculates a position of both the source and detector based on the acceleration data generated by the accelerometers. An image reconstructor (62) receives the relative position data; electronically corrects for any misalignment or change in beam travel distance, and reconstructs the views into a volumetric image representation.

대표청구항 ▼

[ Having thus described the preferred embodiment, the invention is now claimed to be:] [10.] A radiographic imaging apparatus including a penetrating radiation source which generates a cone beam of radiation and a radiation detector which receives the cone beam of radiation and is sampled to generat

[ Having thus described the preferred embodiment, the invention is now claimed to be:] [10.] A radiographic imaging apparatus including a penetrating radiation source which generates a cone beam of radiation and a radiation detector which receives the cone beam of radiation and is sampled to generate corresponding views of image data, a mechanical structure for supporting the radiation source and the detector on opposite sides of an examination region, a drive for moving the mechanical structure to move the radiation source and the detector around the examination region, and a reconstruction processor for reconstructing a plurality of the image data views into a volumetric image representation, further comprising:a first accelerometer for measuring acceleration of the radiation source and generating a first acceleration signal indicative of the measured acceleration;a second accelerometer for measuring acceleration of the detector and generating a second acceleration signal indicative of the measured acceleration; anda position processor which integrates the first and second acceleration signals and determines a position of the radiation source and a position of the detector corresponding to each sampling of the detector to generate one of the image data views, the position processor being connected with the reconstruction processor for conveying the determined radiation source and detector positions to the reconstruction processor.