公开(公告)号：US20120057670A1

公开(公告)日：2012-03-08

申请号：US13319151

申请日：2010-04-15

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

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

IPC: A61B6/03

CPC classification number: A61B6/032 ,  A61B6/4241 ,  A61B6/4266 ,  A61B6/4452 ,  G01T1/1644 ,  G01T1/2985

Abstract: An imaging system (100) includes a radiation source (108) that emits radiation that traverses an examination region (106) and a detection system (114) that detects radiation that traverses the examination region (106) and generates a signal indicative thereof. The detection system (114) includes a first detector array (1141-114N) and a second detector array (1141-114N). The first and second detector arrays (1141-114N) are separately distinct detector arrays and at least one of the detector arrays (1141-114N) is moveable with respect to the radiation beam. A reconstructor (116) reconstructs the signal and generates volumetric image data indicative thereof.

Abstract translation: 成像系统（100）包括发射穿过检查区域（106）的辐射的辐射源（108）和检测穿过检查区域（106）的辐射并产生指示其的信号的检测系统（114）。 检测系统（114）包括第一检测器阵列（1141-114N）和第二检测器阵列（1141-114N）。 第一和第二检测器阵列（1141-114N）是分别不同的检测器阵列，并且检测器阵列（1141-114N）中的至少一个可相对于辐射束移动。 重构器（116）重建信号并产生指示其的体积图像数据。

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：US5978438A

公开(公告)日：1999-11-02

申请号：US992866

申请日：1997-12-12

Applicant: Theodore A. Resnick ,  David A. Wilcox ,  Rodney A. Mattson

Inventor： Theodore A. Resnick ,  David A. Wilcox ,  Rodney A. Mattson

IPC: A61B6/00 ,  A61B6/03 ,  H05G1/60

CPC classification number: A61B6/56 ,  A61B6/032 ,  A61B6/4021

Abstract: A radiographic scanner (10) has a stationary gantry portion (12) defining a subject receiving region (16) and a rotating gantry portion (20) on which an imaging x-ray tube (22) is mounted. The rotating gantry portion (20) is rotatably mounted to the stationary gantry portion (12) for rotation about the subject receiving region (16). A slip ring assembly extending around the subject receiving region (16) connected with the stationary and rotating gantry portions, includes a scintillating optical fiber (44) mounted around the patient receiving region (16) to one of the rotating and stationary gantry portions. A communication x-ray tube (40) is mounted to the other gantry portion and directed such that radiation therefrom enters the scintillating optical fiber (44) from a lateral direction. The scintillating optical fiber (44) converts the incident x-rays (52) to light (58) and transmits the light (58) along its longitudinal axis. The scintillating optical fiber (44) is enclosed in a protective sheathing (50) that is opaque to optical radiation which protects the fiber from damage and eliminates noise, inaccuracy, and false signals caused by ambient and stray light entering the fiber.

Abstract translation: 射线照相扫描器（10）具有限定被摄体接收区域（16）的固定台架部分（12）和安装成像X射线管（22）的旋转台架部分（20）。 旋转机架部分（20）可旋转地安装到固定机架部分（12）上，用于围绕对象接收区域（16）旋转。 围绕与固定和旋转台架部分连接的被摄体接收区域（16）延伸的滑环组件包括安装在患者接收区域（16）周围的旋转和静止机架部分之一中的闪烁光纤（44）。 通信X射线管（40）安装到另一台架部分并被引导使得其从其横向方向进入闪烁光纤（44）。 闪烁光纤（44）将入射的X射线（52）转换成光（58），并沿其纵向轴线透射光（58）。 闪烁光纤（44）封装在对光辐射不透明的保护性护套（50）中，保护光纤免受损坏，并消除由环境和杂散光进入光纤引起的噪声，不精确和假信号。

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：US08766199B2

公开(公告)日：2014-07-01

申请号：US13510168

申请日：2010-11-18

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

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

IPC: G01T1/02 ,  G01T7/00

CPC classification number: G01T7/005

Abstract: A detector tile (116) of an imaging system (100) includes a photosensor array (204) and electronics (208) electrically coupled to the photosensor array (204), wherein the electronics includes a dose determiner (402) that determines a deposited dose for the detector tile (116) and generates a signal indicative thereof. In one non-limiting instance, this signal is utilized to correct parameters such as gain and thermal coefficients, which may vary with radiation dose.

Abstract translation: 成像系统（100）的检测器瓦片（116）包括电耦合到光电传感器阵列（204）的光电传感器阵列（204）和电子器件（208），其中电子器件包括确定沉积剂量的剂量确定器（402） 用于检测器瓦片（116）并产生指示其的信号。 在一个非限制性实例中，该信号用于校正诸如增益和热系数之类的参数，其可随辐射剂量而变化。