专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US4075492A Fan beam X- or .gamma.-ray 3-D tomography 失效
标题翻译： FAN BEAM X或“-RAY 3-D TOMOGRAPHY
公开(公告)号：US4075492A
公开(公告)日：1978-02-21
申请号：US528026
申请日：1974-11-29
申请人： Douglas P. Boyd , Michael Goitein
发明人： Douglas P. Boyd , Michael Goitein
IPC分类号： A61B6/03 , G01T1/29 , H01J47/06 , G01N21/34
CPC分类号： G01T1/2935 , A61B6/032 , A61B6/06 , A61B6/4078 , A61B6/466 , H01J47/06 , A61B6/4258 , A61B6/4291
摘要： A fan-shaped beam of penetrating radiation, such as X-ray or .gamma.-ray radiation, is directed through a slice of the body to be analyzed to a position sensitive detector for deriving a shadowgraph of transmission or absorption of the penetrating radiation by the body. A number of shadowgraphs are obtained for different angles of rotation of the fan-shaped beam relative to the center of the slice being analyzed. The detected fan beam shadowgraph data is reordered into shadowgraph data corresponding to sets of parallel paths of radiation through the body. The reordered parallel path shadowgraph data is then convoluted in accordance with a 3-D reconstruction method by convolution in a computer to derive a 3-D reconstructed tomograph of the body under analysis. In a preferred embodiment, the position sensitive detector comprises a multiwire detector wherein the wires are arrayed parallel to the direction of the divergent penetrating rays to be detected. A focussed grid collimator is interposed between the body and the position sensitive detector for collimating the penetrating rays to be detected. The source of penetrating radiation is preferably a monochromatic source.

2. 发明授权

US4480920A Fringe pattern method and apparatus for producing X-ray dosage compensating filters 失效
标题翻译：用于生产X射线剂量补偿过滤器的边缘图案方法和装置
公开(公告)号：US4480920A
公开(公告)日：1984-11-06
申请号：US519216
申请日：1983-08-02
申请人： Arthur L. Boyer , Michael Goitein
发明人： Arthur L. Boyer , Michael Goitein
IPC分类号： A61B6/08 , A61N5/10 , G01B11/25 , G01B11/24
CPC分类号： G01B11/254 , A61B6/08 , A61N5/10
摘要： Method and apparatus for producing a fringe pattern corresponding to height and depth gradients of an illuminated object with the fringe pattern lines used to define edges of stacked sheets provided as a filter for X-ray dosage tailoring. A camera is provided to produce the fringe pattern on a photographic film using a compact arrangement of light sources, lenses and gratings all within a convenient housing facilitating use yet at the same time providing sufficient resolution through separation of projection and imaging optics. A laser range finder is additionally provided to insure placement of the object to be X-rayed, typically a portion of the human torso, at a standard distance so that the ultimately produced X-ray filter will be properly sized. The filter is produced by cutting a set of lead sheets with edges corresponding to each of the separate contour lines in the exposed and developed film receiving the fringe pattern. Projection techniques are employed in order to size the film record of fringe patterns to a size appropriate for use as an X-ray filter, typically less than life size.
摘要翻译：用于产生对应于照射物体的高度和深度梯度的条纹图案的方法和装置，其中边缘图案线用于限定作为X射线剂量定制的过滤器设置的堆叠片材的边缘。提供照相机以在照相胶片上使用光源，透镜和光栅的紧凑布置来产生条纹图案，所有这些都在便利的外壳内，便于使用，同时通过分离投影和成像光学元件提供足够的分辨率。另外提供激光测距仪，以确保以标准距离放置要被X射线（通常是人体躯干的一部分）的物体，使得最终生产的X射线滤镜将被适当地定尺寸。通过在接收边缘图案的曝光和显影胶片中切割一组具有对应于每个单独轮廓线的边缘的铅板来制造该过滤器。采用投影技术以将条纹图案的胶片记录尺寸设定为适合用作X射线滤光片的尺寸，通常小于生命尺寸。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式