公开(公告)号：US4751644A

公开(公告)日：1988-06-14

申请号：US792069

申请日：1985-10-28

Applicant: Narasimharao Koka ,  Heang K. Tuy ,  Gordon D. DeMeester ,  Rodney A. Mattson

Inventor： Narasimharao Koka ,  Heang K. Tuy ,  Gordon D. DeMeester ,  Rodney A. Mattson

IPC: A61B6/00 ,  A61B6/03 ,  G01N23/04 ,  G06T11/00 ,  G06F15/42

CPC classification number: A61B6/541 ,  A61B6/032 ,  A61B6/4275 ,  G06T11/006 ,  G06T2211/412

Abstract: In a fourth generation CT scanner, source views or data sets are generated for reconstruction processing. A fan beam (16) of radiation rays is rotated around an image region (12) to irradiate subsets of detectors of a detector ring (10). A data sampler (B) samples the detectors of each irradiated subset a plurality of times, each time with the radiation fan beam displaced incremently from the preceding time to generate a plurality of the source views or data sheets from the same detectors. A plurality of consecutive source views or data sets are interleaved to produce a signal interleaved view or data fan. More specifically, the data sets are stored in data set memories (20-26) and interleaved serially into a data fan memory (30). Each time the fan beam rotates sufficiently to irradiate a different detector subset, an additional plurality of data sets are generated and interleaved into another data fan. The data fans are reconstructed (E) into a representation of an image of radiation absorptive properties of an object disposed in the image region. This reconstruction method is especially applicable to cardiac synchronization or gated patient scanning. This method improves the dynamic scan capacity of fourth generation scanners, improves tolerance to detector drifts, and improves tolerance to temporal x-ray fluctuations.

Abstract translation: 在第四代CT扫描仪中，生成源视图或数据集用于重建处理。 辐射线的扇形光束（16）围绕图像区域（12）旋转以照射检测器环（10）的检测器的子集。 数据采样器（B）多次对每个辐射子集的检测器进行采样，每次辐射风扇光束从前一时刻逐渐偏移，从相同的检测器生成多个源视图或数据表。 多个连续的源视图或数据组被交织以产生信号交错视图或数据风扇。 更具体地说，数据组被存储在数据集存储器（20-26）中并且串行地交织到数据风扇存储器（30）中。 每次风扇光束旋转足够以照射不同的检测器子集时，产生附加的多个数据集并交织到另一个数据风扇中。 将数据风扇重建（E）成设置在图像区域中的物体的辐射吸收特性的图像的表示。 该重建方法特别适用于心脏同步或门控病人扫描。 该方法提高了第四代扫描仪的动态扫描能力，提高了对探测器漂移的耐受性，并提高了对时间X射线波动的耐受性。

公开(公告)号：US5303148A

公开(公告)日：1994-04-12

申请号：US605372

申请日：1990-10-30

Applicant: Rodney A. Mattson ,  Todd J. Krochta ,  Heang K. Tuy

Inventor： Rodney A. Mattson ,  Todd J. Krochta ,  Heang K. Tuy

IPC: G06T11/00 ,  G06T17/00 ,  G06F15/40

CPC classification number: G06T11/006 ,  G06T17/00

Abstract: During surgery, a physician speaks commands that are received by a microphone (10). A speech processor (12) converts audio signals from the microphone into word signals. A command interpreter (14) compares each word signal with a list of previously authorized command words. When the word signal corresponds to one of the preselected command words, a corresponding command signal is generated and sent to a volume imager (18), a video recorder (20), a hard copy, printer (28), or other system component. The volume imager generates an image representation signal indicative of a portion of image data stored therein which is displayed on a video monitor (B) or recorded on the video recorder.

Abstract translation: 在手术过程中，医师说话由麦克风接收的命令（10）。 语音处理器（12）将来自麦克风的音频信号转换为字信号。 命令解释器（14）将每个字信号与先前授权的命令字的列表进行比较。 当字信号对应于预选命令字中的一个时，生成相应的命令信号并将其发送到卷成像器（18），录像机（20），硬拷贝，打印机（28）或其他系统组件。 体积成像器产生指示存储在其中的图像数据的一部分的图像表示信号，其显示在视频监视器（B）上或记录在录像机上。

公开(公告)号：US5229934A

公开(公告)日：1993-07-20

申请号：US539134

申请日：1990-06-18

Applicant: Rodney A. Mattson ,  Heang K. Tuy

Inventor： Rodney A. Mattson ,  Heang K. Tuy

IPC: G06T5/50 ,  G06T11/00

CPC classification number: G06T11/008 ,  G06T5/50 ,  Y10S378/901

Abstract: A CT or other radiographic scanner (A) generates data that is arranged into sets (32). Each set is convolved (40) with a convolution function (42) and backprojected (44) into an image memory (46) along a corresponding one of a plurality of rays. A corresponding gradient image (52) in which each pixel value has either a one or a zero value is forward projected (54) and compared (60) with a standard. The comparison indicates along which rays data sets including bad data were projected. To subtract the bad data contribution from the image, the image representation is forward projected (90) along the identified rays, convolved (40) with a negative of the convolution function (84), and backprojected (44) along the identified ray into the image memory (46). Further correction may be obtained by replacing the subtracted data with interpolated data. To this end, the image representation is again forward projected (90) along the identified ray, convolved (40) with the original selected convolution function (42), and backprojected (44) into the image representation (46) along the identified ray.

Abstract translation: CT或其他射线照相扫描仪（A）产生排列成组（32）的数据。 每个集合具有卷积函数（42）并沿着多个光线中的相应一个被反投影（44）卷积成图像存储器（46）。 其中每个像素值具有一个或零值的对应的梯度图像（52）被正向投影（54）并与标准进行比较（60）。 比较表明预测包括不良数据的射线数据集。 为了从图像中减去不利的数据贡献，图像表示沿着所识别的光线向前投影（90），与卷积函数（84）的负卷积（40）并且沿着所识别的光线反向投影（44）到 图像存储器（46）。 可以通过用内插数据替换减去的数据来获得进一步的校正。 为此，图像表示再次沿着所识别的光线向前投影（90），与原始选择的卷积函数（42）卷积（40），并沿着所识别的光线反投影（44）到图像表示（46）中。

公开(公告)号：US07873144B2

公开(公告)日：2011-01-18

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: H05G1/64

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）具有至少一个时间上变化的特性，例如偏移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：US07822173B2

公开(公告)日：2010-10-26

申请号：US12159861

申请日：2007-01-04

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

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

IPC: G01N23/00

CPC classification number: A61B6/585 ,  A61B6/032

Abstract: An ionizing radiation detector module (22) includes a detector array (200), a memory (202), signal processing electronics (208), a communications interface (210), and a connector (212). The memory contains detector performance parameters (204) and detector correction algorithms (206). The signal processing electronics (208) uses the detector performance parameters (204) to correct signals from the detector array (200) in accordance with the detector correction algorithms (206).

Abstract translation: 电离辐射检测器模块（22）包括检测器阵列（200），存储器（202），信号处理电子器件（208），通信接口（210）和连接器（212）。 存储器包含检测器性能参数（204）和检测器校正算法（206）。 信号处理电子设备（208）根据检测器校正算法（206）使用检测器性能参数（204）来校正来自检测器阵列（200）的信号。

公开(公告)号：US07573035B2

公开(公告)日：2009-08-11

申请号：US11577604

申请日：2005-10-12

Applicant: Simha Levene ,  Rodney A. Mattson ,  Ami Altman

Inventor： Simha Levene ,  Rodney A. Mattson ,  Ami Altman

IPC: G01T1/20

CPC classification number: G01T1/201 ,  G01T1/2985

Abstract: A radiation detector (24) for an imaging system includes a two-dimensional array (50) of nondeliquescent ceramic scintillating fibers or sheets (52). The scintillating fibers (52) are manufactured from a GOS ceramic material. Each scintillating fiber (52) has a width (d2) between 0.1 mm and 1 mm, a length (h2) between 0.1 mm and 2 mm and a height (h8) between 1 mm and 2 mm. Such scintillating fiber (52) has a height (h8) to cross-sectional dimension (d2, h2) ratio of approximately 10 to 1. The scintillating fibers (52) are held together by layers (86, 96) of a low index coating material. A two-dimensional array (32) of photodiodes (34) is positioned adjacent and in optical communication with the scintillating fibers (52) to convert the visible light into electrical signals. A grid (28) is disposed by the scintillating array (50). The grid (28) has the apertures (30) which correspond to a cross-section of the photodiodes (34) and determine a spatial resolution of the imaging system.

Abstract translation: 用于成像系统的放射线检测器（24）包括非柔性陶瓷闪烁纤维或片（52）的二维阵列（50）。 闪烁纤维（52）由GOS陶瓷材料制成。 每个闪烁光纤（52）具有在0.1mm和1mm之间的宽度（d2），在0.1mm和2mm之间的长度（h2）和在1mm和2mm之间的高度（h8）。 这种闪烁纤维（52）具有大约10比1的高度（h8）至横截面尺寸（d2，h2）比。闪烁纤维（52）通过低折射率涂层（86,96）保持在一起 材料。 光二极管（34）的二维阵列（32）被定位成与闪烁光纤（52）相邻并与之相通，以将可见光转换为电信号。 格栅（28）由闪烁阵列（50）设置。 栅格（28）具有对应于光电二极管（34）的横截面的孔（30）并且确定成像系统的空间分辨率。

公开(公告)号：US06542576B2

公开(公告)日：2003-04-01

申请号：US09766777

申请日：2001-01-22

Applicant: Rodney A. Mattson

Inventor： Rodney A. Mattson

IPC: H01J3500

CPC classification number: H01J35/26

Abstract: An x-ray tube assembly (16) includes a vacuum envelope (52) and an x-ray permeable exit window (58). An anode (50) is positioned within the vacuum envelope (52) such that a near side is adjacent to the exit window (58) and a far side is opposite thereof. A cathode assembly (66) is also mounted within the vacuum envelope (52) which directs an electron beam (72) toward a focal spot or point (62) on the far side of the anode (50). The anode further includes a central cavity or indentation (70) which provides a location for mounting a set of radiation attenuating vanes (64) in addition to a shaped x-ray filter or compensator (68). Close placement of the vanes (64) and the filter (68) relative to the focal spot of the anode desirably reduce off focal radiation and allow beam shaping. An externally located collimator (18) further shapes the output x-ray beam.

Abstract translation: X射线管组件（16）包括真空外壳（52）和x射线可透过的出射窗（58）。 阳极（50）位于真空封壳（52）内，使得近侧与出射窗（58）相邻，远侧与其相反。 阴极组件（66）也安装在真空外壳（52）内，真空外壳（52）将电子束（72）引向阳极（50）的远侧上的焦点或点（62）。 阳极还包括中心腔或凹口（70），除了成形的x射线滤波器或补偿器（68）之外，还提供用于安装一组辐射衰减叶片（64）的位置。 叶片（64）和过滤器（68）相对于阳极的焦点的紧密放置期望地减少了聚焦辐射，并允许光束成形。 外部定位的准直器（18）进一步使输出的X射线束成形。

公开(公告)号：US06426991B1

公开(公告)日：2002-07-30

申请号：US09714685

申请日：2000-11-16

Applicant: Rodney A. Mattson ,  Chris J. Vrettos

Inventor： Rodney A. Mattson ,  Chris J. Vrettos

IPC: A61B600

CPC classification number: H01L27/14661 ,  A61B6/032 ,  G01T1/2018

Abstract: A CT scanner (10) includes a reconstruction processor (32) for reconstructing an image from digital signals from detector arrays (20). Each detector array includes scintillation crystals (22) arranged in an array for converting x-ray radiation into light. An array of back-illuminated photo diodes (24) is mounted beneath the scintillation crystal array for converting the light emitted from the scintillation crystals into electrical charge. The electrical charge from the back-illuminated photodiodes is transmitted via a path orthogonal to the detector array (20, 40) to signal processing circuitry (66). The back-illuminated photodiode has a backside (26) which is in optical communication with the crystal array (22) and which is optically transmissive to photons of light emanating from the crystal. The converted electrical charge leaves the photodiode via electrical connections (28) or bump bonds (62, 72) on the front side of the photodiode. This arrangement allows a plurality of paths (46) through the substrate (42, 64) supporting the photodiode to provide electrical connectivity (44) from the array to processing circuitry (66), reducing or eliminating the bottleneck of electrical leads from conventional arrays.

Abstract translation: CT扫描器（10）包括用于从来自检测器阵列（20）的数字信号重建图像的重构处理器（32）。 每个检测器阵列包括以阵列布置的用于将x射线辐射转换成光的闪烁晶体（22）。 背光照明二极管（24）的阵列安装在闪烁晶体阵列下方，用于将从闪烁晶体发射的光转换成电荷。 来自背照式光电二极管的电荷经由与检测器阵列（20,40）正交的路径传输到信号处理电路（66）。 背照式光电二极管具有与晶体阵列（22）光学通信并且对从晶体发出的光的光子透光的背面（26）。 转换的电荷通过光电二极管正面上的电连接（28）或凸起键（62,72）离开光电二极管。 这种布置允许穿过支撑光电二极管的衬底（42,64）的多个路径（46）提供从阵列到处理电路（66）的电连接（44），从而减少或消除了来自常规阵列的电引线的瓶颈。

公开(公告)号：US6092928A

公开(公告)日：2000-07-25

申请号：US191094

申请日：1998-11-12

Applicant: Rodney A. Mattson ,  Pieter G. Roos

Inventor： Rodney A. Mattson ,  Pieter G. Roos

IPC: A61B6/00 ,  A61B6/08

CPC classification number: A61B6/583 ,  A61B6/08 ,  A61B6/4452 ,  A61B6/466 ,  A61B6/547 ,  A61B2562/0219 ,  A61B6/4464

Abstract: An x-ray source (30) transmits a beam of x-rays through an examination region (E). A detector (28), in an initial spatial orientation relative to the source, receives the beam and generates a view of image data indicative of the intensity of the beam received. A first accelerometer (40), capable of generating acceleration data in at least one dimension, is associated with the detector. A second accelerometer (42), capable of generating acceleration data in at least one dimension is associated with the source. A position calculator (60) mathematically calculates a position of both the source and detector based on the acceleration data generated by the accelerometers. An image reconstructor (62) receives the relative position data; electronically corrects for any misalignment or change in beam travel distance, and reconstructs the views into a volumetric image representation.

Abstract translation: X射线源（30）通过检查区域（E）传输一束x射线。 以相对于源的初始空间取向的检测器（28）接收波束并产生指示所接收的波束的强度的图像数据的视图。 能够在至少一个维度上产生加速度数据的第一加速度计（40）与检测器相关联。 能够在至少一个维度上生成加速度数据的第二加速度计（42）与源相关联。 位置计算器（60）基于由加速度计产生的加速度数据在数学上计算源和检测器的位置。 图像重构器（62）接收相对位置数据; 电子校正光束行进距离中的任何未对准或变化，并将视图重建为体积图像表示。

公开(公告)号：US4191892A

公开(公告)日：1980-03-04

申请号：US921010

申请日：1978-06-30

Applicant: Sung-Cheng Huang ,  Carl J. Brunnett ,  Rodney A. Mattson

Inventor： Sung-Cheng Huang ,  Carl J. Brunnett ,  Rodney A. Mattson

IPC: A61B6/03 ,  G01N21/34 ,  G01N23/04

CPC classification number: A61B6/035 ,  A61B6/032

Abstract: An improved method for computed tomographic scanning is disclosed. A beam of electromagnetic radiation subtending an angle .phi. is alternately translated and rotated past a patient. The intensity of the beam is detected by an array after the radiation passes the patient and a reconstructed image created from the detected intensities. Each rotation of the array is through an angle less than the angle .phi. subtended by the array producing redundant intensity readings for similarly oriented beam paths through the patient. This redundant intensity data is modified according to a scheme which tends to reduce motion and misalignment artifacts within the patient.

Abstract translation: 公开了一种用于计算机断层扫描的改进方法。 朝向角度phi的电磁辐射束交替地平移并旋转经过患者。 在辐射通过患者之后，通过阵列检测光束的强度，并且根据检测到的强度创建重建图像。 阵列的每次旋转通过小于由阵列对向的角度phi的角度，产生通过患者的类似定向的束路径的冗余强度读数。 这种冗余强度数据根据倾向于减少患者内的运动和不对准假象的方案进行修改。