公开(公告)号：US20090238330A1

公开(公告)日：2009-09-24

申请号：US11721163

申请日：2005-12-05

Applicant: Randall P. Luhta ,  Marc A. Chappo ,  Brian E. Harwood ,  Rodney A. Mattson ,  Chris J. Vrettos

Inventor： Randall P. Luhta ,  Marc A. Chappo ,  Brian E. Harwood ,  Rodney A. Mattson ,  Chris J. Vrettos

IPC: H05G1/60

CPC classification number: A61B6/032 ,  A61B6/585 ,  G01T1/24

Abstract: A radiographic imaging apparatus (10) comprises a primary radiation source (14) which projects a beam of radiation into an examination region (16). A detector (18) converts detected radiation passing through the examination region (16) into electrical detector signals representative of the detected radiation. The detector (18) has at least one temporally changing characteristic such as an offset B(t) or gain A(t). A grid pulse means (64) turns the primary radiation source (14) ON and OFF at a rate between 1000 and 5000 pulses per second, such that at least the offset B(t) is re-measured between 1000 and 5000 times per second and corrected a plurality of times during generation of the detector signals. The gain A(t) is measured by pulsing a second pulsed source (86, 100, 138) of a constant intensity (XRef) with a second pulse means (88). The gain A(t) is re-measured and corrected a plurality of times per second during generation of the detector signals.

Abstract translation: 放射线照相成像装置（10）包括将辐射束投射到检查区域（16）中的主要辐射源（14）。 检测器（18）将通过检查区域（16）的检测到的辐射转换成代表检测到的辐射的电检测器信号。 检测器（18）具有至少一个时变特性，如偏移量B（t）或增益A（t）。 电网脉冲装置（64）以每秒1000至5000个脉冲之间的速率使主辐射源（14）接通和断开，使得至少偏移B（t）在每秒1000至5000次之间重新测量 并且在检测器信号的产生期间多次校正。 通过用第二脉冲装置（88）脉冲具有恒定强度（XRef）的第二脉冲源（86,100,138）来测量增益A（t）。 在检测器信号的产生期间，增益A（t）被重新测量和校正多次。

公开(公告)号：US6041097A

公开(公告)日：2000-03-21

申请号：US55607

申请日：1998-04-06

Applicant: Pieter Gerhard Roos ,  Andrew J. Ivan ,  Rodney A. Mattson

Inventor： Pieter Gerhard Roos ,  Andrew J. Ivan ,  Rodney A. Mattson

IPC: G06T1/00 ,  A61B6/03 ,  G01N23/04

CPC classification number: A61B6/4233 ,  A61B6/032

Abstract: A gantry (10) includes a large diameter bearing having an outer race (12) and an inner race (16) which surrounds an examination region. An x-ray tube (18) and collimator (52) are mounted to the inner race, as is a flat panel detector (20) and a mechanical mechanism (50) for moving the flat panel detector closer to and further from the examination region. A timing and control circuit (30) controls a motor (22) which indexes the inner race around the examination region, an x-ray power supply (32) which pulses the x-ray tube in a fluoroscopic mode at discrete positions around the examination region, and a read out circuit (34) which reads out a frame of data after each pulse of the x-ray tube. The read out frames of data are stored in a frame memory (36) and reconstructed by a reconstruction processor (38) into a volumetric image representation for storage in a volume image memory (40). A video processor (42) reformats individual frames from frame memory (36) or selected portions of volume image representation from the volume image memory (40) into appropriate format for display on a video monitor (44). A magnification control (54) coordinates adjustment of the collimator (52) and movement of the flat plate detector toward and away from the examination region.

Abstract translation: 台架（10）包括具有围绕检查区域的外圈（12）和内座圈（16）的大直径轴承。 如同平板检测器（20）和机械机构（50）一样，将X射线管（18）和准直器（52）安装到内座圈上，用于使平板检测器更靠近和远离检查区域 。 定时和控制电路（30）控制围绕检查区域对内座圈进行索引的马达（22），在检查周围的离散位置以荧光检查模式脉冲X射线管的X射线电源（32） 区域，以及读出电路（34），其在x射线管的每个脉冲之后读出数据帧。 读出的数据帧被存储在帧存储器（36）中并由重建处理器（38）重建成体积图像表示，以存储在卷图像存储器（40）中。 视频处理器（42）将来自帧存储器（36）的单个帧或从卷图像存储器（40）的卷图像表示的选定部分重新格式化为用于在视频监视器（44）上显示的适当格式。 放大控制器（54）协调准直器（52）的调节和平板检测器朝向和远离检查区域的移动。

公开(公告)号：US4980904A

公开(公告)日：1990-12-25

申请号：US219905

申请日：1988-07-13

Applicant: Richard A. Sones ,  Karen L. Lauro ,  Rodney A. Mattson

Inventor： Richard A. Sones ,  Karen L. Lauro ,  Rodney A. Mattson

IPC: A61B6/00 ,  G21K1/10 ,  H05G1/26 ,  H05G1/60

CPC classification number: A61B6/583 ,  A61B6/482 ,  G21K1/10 ,  H05G1/26 ,  H05G1/60 ,  A61B6/4266

Abstract: An apparatus and method is disclosed for facilitating calibration of a dual energy digital radiography system having a focused multi-element detector assembly. The apparatus includes two sets of calibration elements, each set made of a different basis material. Each calibration element defines a segment of an annulus and is positionable between the system source and detector such that the center defined by the annulus is substantially coincident with the focal spot of the source. Within individual sets, the thicknesses of the respective member elements differ one from another in accordance with a binary progression. Each of the calibration elements is positioned and sized such that it intercepts and attenuates all radiation which ultimately falls upon the detector.

Abstract translation: 公开了一种便于校准具有聚焦多元件检测器组件的双能数字射线照相系统的装置和方法。 该装置包括两组校准元件，每组由不同的基础材料制成。 每个校准元件限定环形部分并且可定位在系统源和检测器之间，使得由环形部分限定的中心基本上与源的焦斑重合。 在单独的组中，各个构件元件的厚度根据二进制进程彼此不同。 每个校准元件的定位和尺寸使得其截取并衰减最终落在检测器上的所有辐射。

公开(公告)号：US4905268A

公开(公告)日：1990-02-27

申请号：US222521

申请日：1988-07-21

Applicant: Rodney A. Mattson ,  Robert E. Levar

Inventor： Rodney A. Mattson ,  Robert E. Levar

IPC: A61B6/03 ,  A61B6/06 ,  G21K1/02

CPC classification number: A61B6/4488 ,  A61B6/032 ,  A61B6/06 ,  G21K1/025

Abstract: A radiographic 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 (62) 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, aperture or 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. Moreover, rotating slots of different sizes into alignment changes the size or angle of the x-ray fan beam.

Abstract translation: 放射线照相设备（10）包括X射线管（16），非焦距辐射准直器（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。 管口通过铝合金窗口（46）与大气密封。 辐射阻挡材料的板（62）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，孔径或辐射通过的狭槽或不同尺寸的部分（62,64）在X射线管的焦斑（34）和辐射通过区域或狭槽（52）之间被选择性地对准 在所述套环的远端处的固定板（50）。 对齐的插槽阻挡了非焦距辐射的通过。 此外，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。

公开(公告)号：US4870667A

公开(公告)日：1989-09-26

申请号：US302097

申请日：1989-01-24

Applicant: Carl J. Brunnett ,  Rodney A. Mattson

Inventor： Carl J. Brunnett ,  Rodney A. Mattson

IPC: G01T1/20 ,  G01T1/202

CPC classification number: G01T1/202 ,  G01T1/2018

Abstract: An improved computed tomography radiation detector is disclosed. One embodiment includes first and second layers of crystalline scintilation material mutually aligned in a path of x-rays to be detected, to receive the x-rays in sequence. The layer upstream in the x-ray path comprises a scintillation material having a relatively high efficiency for converting x-ray energy to light. The downstream one of the layers comprises a scintillation material having a relatively lower efficiency for x-ray/light conversion. A photodiode is positioned to view both scintillation layers simultaneously and to respond to scintillations in either or both. Scintillation crystal material surfaces can be coated with reflective material to enhance the effects of their scintillations. The photodiode thus combines x-ray indicating scintillations from both crystals while in analog form. The detector exhibits enhanced response to lower energy x-rays. Another embodiment comprises a photodiode and an optically coupled scintillation crystal, with the photodiode upstream in the x-ray beam path relative to the crystal.

Abstract translation: 公开了一种改进的计算机断层摄影辐射检测器。 一个实施例包括在待检测的x射线的路径中相互对准的第一和第二晶体闪烁材料层，以顺序接收x射线。 x射线路径上游的层包括具有将X射线能量转换为光的相对较高效率的闪烁材料。 下游层之一包括具有相对较低的x射线/光转换效率的闪烁材料。 光电二极管被定位成同时观察两个闪烁层并且在两者之一或两者中对闪烁进行响应。 闪烁晶体材料表面可以用反射材料涂覆以增强其闪烁的影响。 因此，光电二极管结合来自两个晶体的X射线指示闪烁，同时以模拟形式。 检测器对较低能量的X射线表现出增强的响应。 另一个实施例包括光电二极管和光耦合闪烁晶体，其中光电二极管相对于晶体在x射线束路径上游。

公开(公告)号：US4779621A

公开(公告)日：1988-10-25

申请号：US16266

申请日：1987-02-19

Applicant: Rodney A. Mattson

Inventor： Rodney A. Mattson

IPC: A61B5/08 ,  A61B6/00

CPC classification number: A61B6/583 ,  A61B5/0813 ,  A61B6/00

Abstract: A xenon concentration phantom (A) is mounted in a CT scanner (B). A xenon/oxygen breathing gas mixture from a breathing gas supply system is (C) circulated through an analysis chamber (12) of the phantom before a human scan is commenced. The CT scanner measures the amount of radiation absorption attributable to the gas in the analysis chamber, which absorption varies in proportion to the concentration of xenon gas. The measured radiation absorption is converted into a precise measurement or indication of the xenon concentration of the breathing gas. The precise xenon concentration measurement may be utilized to calibrate xenon gas detectors (80, 100) in the breathing gas supply system or to calibrate xenon concentration dependent diagnostic data generated during a subsequent patient scan while the patient is breathing the breathing gas.

Abstract translation: 氙浓度体模（A）安装在CT扫描仪（B）中。 来自呼吸气体供应系统的氙/氧呼吸气体混合物（C）在人体扫描开始之前通过体模的分析室（12）循环。 CT扫描仪测量归因于分析室中的气体的辐射吸收量，该吸收与氙气的浓度成比例地变化。 测量的辐射吸收转化为呼吸气体的氙气浓度的精确测量或指示。 精确的氙气浓度测量可用于校准呼吸气体供应系统中的氙气体检测器（80,100），或校准在患者呼吸呼吸气体期间随后的患者扫描期间产生的氙浓度依赖性诊断数据。

公开(公告)号：US4686692A

公开(公告)日：1987-08-11

申请号：US722672

申请日：1985-04-12

Applicant: Gordon D. DeMeester ,  Rodney A. Mattson

Inventor： Gordon D. DeMeester ,  Rodney A. Mattson

IPC: G01N23/04 ,  A61B6/00 ,  A61B6/03 ,  A61B6/04

CPC classification number: A61B6/0457 ,  A61B6/032 ,  A61B6/4275 ,  Y10S378/901

Abstract: Method and apparatus for a computed tomography patient localization scan. A source of radiation that orbits a patient during a normal computed tomography scan is fixed relative an array of radiation detectors. The patient is then moved in a direction generally perpendicular to the plane of the radiating source and array to obtain a first shadowgraph data set. The source is orbited a small amount and the patient is again moved relative the source and detector array to obtain a second shadowgraph set of data. The two sets of data are then interleaved to obtain a shadowgraph image having higher resolution than either the first or second shadowgraph.

Abstract translation: 计算机断层扫描患者定位扫描的方法和装置。 在正常计算机断层摄影扫描期间围绕患者的辐射源相对于辐射检测器阵列是固定的。 然后将患者沿大致垂直于辐射源和阵列的平面的方向移动，以获得第一阴影图数据集。 来源围绕少量轨道，并且患者再次相对于源和检测器阵列移动以获得第二个阴影集数据。 然后将两组数据进行交织以获得比第一或第二阴影图具有更高分辨率的阴影图像。

公开(公告)号：US08710448B2

公开(公告)日：2014-04-29

申请号：US12293842

申请日：2007-03-08

Applicant: Randall P. Luhta ,  Marc A. Chappo ,  Brian E. Harwood ,  Rodney A. Mattson ,  Chris J. Vrettos

Inventor： Randall P. Luhta ,  Marc A. Chappo ,  Brian E. Harwood ,  Rodney A. Mattson ,  Chris J. Vrettos

IPC: G01T1/20 ,  H01L31/00

CPC classification number: H01L27/14663 ,  G01N2223/501 ,  G01T1/2018 ,  H01L23/3114 ,  H01L24/73 ,  H01L27/14618 ,  H01L27/14634 ,  H01L27/14661 ,  H01L2224/0401 ,  H01L2224/04042 ,  H01L2224/0603 ,  H01L2224/06051 ,  H01L2224/16145 ,  H01L2224/32145 ,  H01L2224/32225 ,  H01L2224/32245 ,  H01L2224/48091 ,  H01L2224/48145 ,  H01L2224/73253 ,  H01L2224/73265 ,  H01L2924/14 ,  H01L2924/1433 ,  H01L2924/15192 ,  H01L2924/16151 ,  H01L2924/16235 ,  H01L2924/19104 ,  H01L2924/19105 ,  H01L2924/3025 ,  H01L2924/00012 ,  H01L2924/00014 ,  H01L2924/00

Abstract: A radiation detector module (22) particularly well suited for use in computed tomography (CT) applications includes a scintillator (200), a photodetector array (202), and signal processing electronics (205). The photodetector array (202) includes a semiconductor substrate (208) having a plurality of photodetectors and metalization (210) fabricated on non-illuminated side of the substrate (208). The metalization routes electrical signals between the photodetectors and the signal processing electronics (205) and between the signal processing electronics (205) and an electrical connector (209).

Abstract translation: 特别适用于计算机断层摄影（CT）应用的辐射探测器模块（22）包括闪烁体（200），光电检测器阵列（202）和信号处理电子器件（205）。 光电探测器阵列（202）包括半导体衬底（208），该半导体衬底具有多个光电检测器和在衬底（208）的非照射侧制造的金属化（210））。 金属化路由光电检测器和信号处理电子器件（205）之间以及信号处理电子器件（205）和电连接器（209）之间的电信号。

公开(公告)号：US20110210256A1

公开(公告)日：2011-09-01

申请号：US13128883

申请日：2009-10-29

Applicant: Rodney A. Mattson ,  Randall P. Luhta ,  Marc A. Chappo

Inventor： Rodney A. Mattson ,  Randall P. Luhta ,  Marc A. Chappo

IPC: G01T1/20

CPC classification number: G01T1/2018 ,  G01T1/00 ,  G01T1/161

Abstract: A one-dimensional multi-element photo detector (120) includes a photodiode array (122) with a first upper row of photodiode pixels and a second lower row of photodiode pixels. The photodiode array (122) is part of the photo detector (120). A scintillator array (126) includes a first upper row and a second lower row of scintillator pixels. The first upper and second lower rows of scintillator pixels are respectively optically coupled to the first upper and second lower rows of photodiode pixels. The photo detector (120) also includes readout electronics (124), which are also part of the photo detector (120). Electrical traces (512) interconnect the photodiode pixels and the readout electronics (124).

Abstract translation: 一维多元素光电检测器（120）包括具有第一上行光电二极管像素和第二下行光电二极管像素的光电二极管阵列（122）。 光电二极管阵列（122）是光电检测器（120）的一部分。 闪烁体阵列（126）包括第一上列和第二下列闪烁体像素。 闪烁体像素的第一上，下下排分别光耦合到光电二极管像素的第一上列和第二下行。 光检测器（120）还包括读出电路（124），其也是光电检测器（120）的一部分。 电迹线（512）将光电二极管像素和读出电路（124）互连。

公开(公告)号：US07379528B2

公开(公告)日：2008-05-27

申请号：US10541623

申请日：2003-12-17

Applicant: Rodney A. Mattson ,  Randall P. Luhta ,  Marc A. Chappo

Inventor： Rodney A. Mattson ,  Randall P. Luhta ,  Marc A. Chappo

IPC: H05G1/60 ,  H05G1/64 ,  G01T1/24

CPC classification number: G01N23/046 ,  G01N2223/419 ,  G01T1/2018 ,  G01T1/2985

Abstract: A radiation detector module includes a scintillator (62, 62′, 162, 262) arranged to receive penetrating radiation of a computed tomography apparatus (10). The scintillator produces optical radiation responsive to the penetrating radiation. A detector array (66, 66′, 166, 266) is arranged to convert the optical radiation into electric signals. Electronics (72, 72′, 172, 272) are arranged on a side of the detector array opposite from the scintillator in a path of the penetrating radiation. A radiation shield (86, 86′, 100, 100′, 100″, 186, 210, 210′, 286, 286′) is disposed between the detector array and the electronics to absorb the penetrating radiation that passes through the scintillator. The radiation shield includes openings (90, 90′) that communicate between the detector array and the electronics. Electrical feedthroughs (88, 88′, 102, 102′, 102″, 188, 212, 212′, 288, 288′) pass through the radiation shield openings and electrically connect the detector array and the electronics.

Abstract translation: 放射线检测器模块包括布置成接收计算机断层摄影装置（10）的穿透辐射的闪烁体（62,62'，162,262）。 闪烁体产生响应穿透辐射的光辐射。 检测器阵列（66,66'，166,266）被布置成将光辐射转换成电信号。 在穿透辐射的路径中，电子器件（72,72'，172,272）被布置在与闪烁体相反的检测器阵列的一侧。 辐射屏蔽（86,86'，100,100'，100“，186,210,210'，286,286'）设置在检测器阵列和电子器件之间以吸收通过闪烁体的穿透辐射。 辐射屏蔽包括在检测器阵列和电子装置之间通信的开口（90,90'）。 电馈通（88,88'，102,102'，102“，188,212,212'，288,288'）穿过辐射屏蔽开口并电连接检测器阵列和电子装置。