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公开(公告)号：EP0365301B1
公开(公告)日：1994-08-31
申请号：EP89310703.7
申请日：1989-10-18
IPC分类号： A61B6/03
CPC分类号： A61B6/5205 , A61B6/032 , G01T1/2985
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公开(公告)号：EP0378896A3
公开(公告)日：1991-05-22
申请号：EP89310037.0
申请日：1989-10-02
发明人： Mattson, Rodney A.
CPC分类号： A61B6/4233 , A61B6/4021 , G01T1/2018
摘要： Radiation detectors (20) of a computed tomography scanner (10) each have a radiation receiving face (34) which is larger than a photosensitive face (30) of a photodiode (22). Lead wires (28) connect the ends of the diode photosensitive surface to terminals (26). A scintillation crystal (32) has an overhanging portion (38) which overhangs at least the interconnection between the lead wires and the photosensitive face to protect the adjoining areas of the photosensitive face fro incident radiation. This enables the radiation receiving surface to be larger than the photosensitive surface. The crystal is either undercut to define the overhanging area or a section of light pipe (60) is provided between the photosensitive surface and the crystal. Increasing the radiation receiving face decreases rotor ripple artifacts. Decreasing the photosensitive face area decreases diode capacitance and increases resistance which improves amplifier performance.
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公开(公告)号：EP0378896A2
公开(公告)日：1990-07-25
申请号：EP89310037.0
申请日：1989-10-02
发明人： Mattson, Rodney A.
CPC分类号： A61B6/4233 , A61B6/4021 , G01T1/2018
摘要： Radiation detectors (20) of a computed tomography scanner (10) each have a radiation receiving face (34) which is larger than a photosensitive face (30) of a photodiode (22). Lead wires (28) connect the ends of the diode photosensitive surface to terminals (26). A scintillation crystal (32) has an overhanging portion (38) which overhangs at least the interconnection between the lead wires and the photosensitive face to protect the adjoining areas of the photosensitive face fro incident radiation. This enables the radiation receiving surface to be larger than the photosensitive surface. The crystal is either undercut to define the overhanging area or a section of light pipe (60) is provided between the photosensitive surface and the crystal. Increasing the radiation receiving face decreases rotor ripple artifacts. Decreasing the photosensitive face area decreases diode capacitance and increases resistance which improves amplifier performance.
摘要翻译： 计算机断层摄影扫描器（10）的辐射检测器（20）各自具有大于光电二极管（22）的感光面（30）的辐射接收面（34）。 引线（28）将二极管感光表面的端部连接到端子（26）。 闪烁晶体（32）具有突出部分（38），其突出至少引线与感光面之间的互连，以保护感光面的相邻区域的入射辐射。 这使得辐射接收表面能够大于感光表面。 晶体是底切以限定突出区域，或者在感光表面和晶体之间设置一部分光管（60）。 增加辐射接收面减少转子波纹伪影。 降低感光面积会降低二极管电容并增加电阻，从而提高放大器的性能。
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公开(公告)号：EP0290165A1
公开(公告)日：1988-11-09
申请号：EP88303568.5
申请日：1988-04-20
IPC分类号： A61B6/06
CPC分类号： A61B6/4488 , A61B6/06
摘要： A radiography apparatus (10) includes an x-ray tube (16), an off-focal radiation collimator (20), a shutter (22), and a primary beam defining collimator (24) between the x-ray tube and patient receiving region (14). The off-focal collimator is mounted within a collar (48) which surrounds an x-ray port (36) of the x-ray tube. The tube port is sealed from the atmosphere by an aluminum window (46). A plate (60) of a radiation blocking material is rotatably mounted by a bearing (70) within the collar closely adjacent the aluminum window. By rotating the moveable plate, radiation passing slots or portions (62, 64) of different sizes are selectively brought into alignment between a focal spot (34) of the x-ray tube and a radiation passing region or slot (52) of a stationary plate (50) at the distal end of the collar. The aligned slots block the passage of off-focal radiation. Rotating slots of different sizes into alignment changes the size or angle of the x-ray fan beam.
摘要翻译： 射线照相装置（10）包括X射线管（16），非焦距辐射准直仪（20），快门（22）和在X射线管和患者接收之间限定准直器（24）的主光束 区域（14）。 偏焦准直器安装在围绕x射线管的x射线端口（36）的轴环（48）内。 管口通过铝合金窗（46）与大气密封。 辐射阻挡材料的板（60）通过轴承（70）可旋转地安装在紧邻铝窗的轴环内。 通过旋转可移动板，不同尺寸的辐射通过狭槽或部分（62,64）选择性地在X射线管的焦斑（34）与固定的辐射通过区域或狭槽（52）之间对准 板（50）在套环的远端处。 对齐的插槽阻挡了非焦距辐射的通过。 不同尺寸的旋转槽对准改变了X射线扇形束的尺寸或角度。
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公开(公告)号：EP0138625A2
公开(公告)日：1985-04-24
申请号：EP84307147.3
申请日：1984-10-17
摘要： A radiographic system comprising a source of penetrative radiation (10) and a detector (14) having a plurality of energy sensitive detector elements for producting electrical signals in repsonse to the radiation. Means are provided for actuating the source (10) so as to direct radiation through a subject (P) onto the detector (14). Means are also provided for moving the detector (14) relative to the subject (P) whilst exposing a number of detector elements to the radiation passing through the subject (P). Time delay and integrate circuitry is associated with the detector elements so as to operate on the signals produced by the elements so as to improve their signal to noise ratio. Imaging circuitry is provided for producing a representation of the internal structure of the subject corresponding to the pattern of radiation incident on the detector elements.
摘要翻译： 一种射线照相系统，包括穿透辐射源（10）和具有多个能量敏感检测器元件的检测器（14），所述检测器元件用于产生电信号以响应辐射。 设置用于致动源（10）以便将辐射通过被摄体（P）引导到检测器（14）上的装置。 还提供了用于在将多个检测器元件暴露于通过对象（P）的辐射的同时使检测器（14）相对于被摄体（P）移动的装置。 时间延迟和积分电路与检测器元件相关联，以便对由元件产生的信号进行操作，从而提高它们的信噪比。 提供成像电路用于产生对应于入射在检测器元件上的辐射图案的对象的内部结构的表示。
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公开(公告)号：EP0365301B2
公开(公告)日：2002-09-25
申请号：EP89310703.7
申请日：1989-10-18
IPC分类号： A61B6/03
CPC分类号： A61B6/5205 , A61B6/032 , G01T1/2985
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公开(公告)号：EP0290165B1
公开(公告)日：1994-03-16
申请号：EP88303568.5
申请日：1988-04-20
IPC分类号： A61B6/06
CPC分类号： A61B6/4488 , A61B6/06
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公开(公告)号：EP0365301A1
公开(公告)日：1990-04-25
申请号：EP89310703.7
申请日：1989-10-18
IPC分类号： A61B6/03
CPC分类号： A61B6/5205 , A61B6/032 , G01T1/2985
摘要： A plurality of segmented radiation sensitive arrays (30) receive radiation, from a radiation source (16), which has transversed an examination region (14) of a computed tomography scanner (10). Each array (30) includes a plurality of columns (A,B,C) of radiation sensitive cells (A1....A24, B1....B24, C1....C24), e.g. photodiodes, which produce an electrical signal indicative of the intensity of radiation received. Within each of the columns, there are larger cells and smaller cells. The electrical signals from each of the plurality of cells (A1....A24 or B1....B24 or C1....C24) within each column (A or B or C) are serialised (34) and amplified (36a, 36a, 36c). Selected combinations of the electrical signals from the various columns (A,B,C) and larger and smaller elements within each column (A or B or C) are combined (46) and reconstructed (50) into an image representation (2) for display on a video monitor (52).
摘要翻译： 多个分段的辐射敏感阵列（30）从辐射源（16）接收已经横切了计算机断层摄影扫描仪（10）的检查区域（14）的辐射。 每个阵列（30）包括多个辐射敏感单元（A1 ... A24，B1 ... B24，C1 ... C24）的列（A，B，C） 光电二极管产生指示接收的辐射强度的电信号。 在每个列中，有更大的单元格和更小的单元格。 将每列（A或B或C）内的多个单元格（A1 ... A24或B1 ... B24或C1 ... C24）中的每一个的电信号串行化（34）并放大 36a，36a，36c）。 来自各列（A，B，C）的电信号和每列（A或B或C）中的更大和更小的元件的选择的组合被组合（46）和重构（50）成为图像表示（2），用于 显示在视频监视器（52）上。
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公开(公告)号：EP0200374B1
公开(公告)日：1989-08-09
申请号：EP86302428.7
申请日：1986-04-02
CPC分类号： A61B6/0457 , A61B6/032 , A61B6/4275 , Y10S378/901
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