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Two-dimensional slot x-ray bone densitometry, radiography and tomography
Two-dimensional slot x-ray bone densitometry, radiography and tomography
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机译:二维缝隙X射线骨密度测定,射线照相和断层扫描
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摘要
An x-ray system using a slot-shaped detector having n rows and m columns of pixels, where nm, and providing a variety of relative motions between a patient table and a source-detector unit, including translation along the length of the table, translation across the table, and rotation about the focal spot, and processing the pixel values in a variety of ways to produce information such a shadow graphic x-ray images, tomosynthetic images of surfaces that need not be planar, and bone density estimates. In another embodiment, tomographic images can be obtained directly, using a post-patient collimator that passes nearly all of the primary beam to the imager while eliminating nearly all of the scatter. A feedback loop can equalize the exposure for selected parts of the image substantially in real time.
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