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81. 发明公开

EP0782375A1 Apparatus and method for removing scatter from an x-ray image 失效
标题翻译： Vorrichtung und Verfahren zur Entfernung der Streuung ausRöntgenbildern
公开(公告)号：EP0782375A1
公开(公告)日：1997-07-02
申请号：EP96309554.2
申请日：1996-12-30
申请人： Advanced Optical Technologies, Inc.
发明人： Chao, Yong-Sheng
IPC分类号： H05G1/60 , G21K1/02 , A61B6/02
CPC分类号： A61B6/482 , A61B6/06 , A61B6/4035 , A61B6/405 , A61B6/4241 , G01T1/1648 , G06T11/006 , G06T2211/408 , G21K1/025 , H05G1/60
摘要： An apparatus and method for eliminating scatter effects in x-ray imaging using two-dimensional detector arrays is disclosed. The apparatus consits of an x-ray source (14), a front two-dimensional x-ray detector (16), a beam selector (18), and a rear two-dimensional x-ray detector (26). A substantially improved dual-energy method is presented. Based on this method, the primary image of the front detector (16) is calculated from a pair of primary dual-energy images of the rear detector (26). Subsequently, the low resolution scatter image of the front detector (16) is determined and the high resolution scatter image of the front detector (16) is calculated. Embodiments of this invention provide a method for elimination of scatter and a method for dual energy x-ray imaging.
摘要翻译：公开了一种用于消除使用二维检测器阵列的X射线成像中的散射效应的装置和方法。该装置包括X射线源（14），前二维X射线检测器（16），光束选择器（18）和后二维X射线检测器（26）。提出了一种基本上改进的双能方法。基于该方法，从后检测器（26）的一对主双能图像计算前检测器（16）的主图像。随后，确定前检测器（16）的低分辨率散射图像，并且计算前检测器（16）的高分辨率散射图像。本发明的实施例提供了一种消除散射的方法和一种双能X射线成像方法。

82. 发明授权

EP0511353B1 DUAL ROTATABLE HEAD GAMMA CAMERA 失效
标题翻译：安排的两个旋转γ照相机
公开(公告)号：EP0511353B1
公开(公告)日：1996-02-07
申请号：EP91920123.6
申请日：1991-11-20
申请人： PICKER INTERNATIONAL, INC.
发明人： PERUSEK, Allan, J.
IPC分类号： A61B6/03 , G01T1/164
CPC分类号： G01T1/1648 , A61B6/037 , A61B6/4266
摘要： A patient is supported along a longitudinal axis of a stationary patient table (10). An outer gantry (20) is mounted to move on rails (22) parallel to the longitudinal axis. The outer gantry supports a large diameter outer race (46) of a large diameter bearing (42). An inner race (44) of the large diameter bearing doubles as a structural outer frame for an inner gantry (30) which defines a patient receiving aperture (36) centrally therethrough. The large diameter bearing enables the inner gantry to rotate about the longitudinal axis. A motor (68) selectively adjusts an angular position of a first detector head (32) about a first axis (62) that lies in a plane transverse to the longitudinal axis through the large diameter bearing. A second motor (78) selectively adjusts an angular position of a second detector head (34) about a second axis (72) also lying in the plane. The motors (86 and 96) along with associated drive mechanisms selectively move the first and second camera heads, independently, toward and away from the longitudinal axis.

83. 发明授权

EP0451231B1 A GANTRY AND PALLET ASSEMBLY USED IN NUCLEAR IMAGING 失效
标题翻译：住房和调色板安排用于核例证。
公开(公告)号：EP0451231B1
公开(公告)日：1995-10-25
申请号：EP90914639.1
申请日：1990-09-24
申请人： TRIONIX RESEARCH LABORATORY, INCORPORATED
发明人： LIM, Chun, Bin , WALKER, Rick, W. , SOBIN, Robert, E. , PINKSTAFF, Carlos, D.
IPC分类号： G01T1/166 , G01T1/164 , A61B6/04
CPC分类号： A61B6/0457 , G01T1/1648
摘要： A gantry (2) and pallet (90) assembly using scintillation cameras (46) to acquire data emitted from radiopharmaceuticals previously introduced into a patient. The radiopharmaceuticals accumulate in a predetermined region of interest within the patient. The gantry (2) can perform both whole body and single photon emission computed tomograph (SPECT) scans. The gantry (2) has two scintillation cameras (46) mounted in a diametrically opposed manner on and in close proximity to a rotation ring (24). Each camera (46) can be radially translated relative to the rotation ring (24) simultaneously with the rotation of the rotation ring (24). The gantry (2) is capable of being translated along a pair of translation tracks (12) so that a pallet (52, 54) upon which a patient lies passes therethrough. The pallet assembly (90) has a storage carriage which supports a substantially rectangular flat pallet (52) upon a slidable frame (68), and a curved pallet (54) upon an extension assembly (68). The storage carriage (50) can be slid away from the gantry (2) or close to the gantry (2). When the storage carriage (50) is close to the gantry (2) either pallet (52, 54) can be easily transferred to a vertically adjustable pallet support (110, 112) used during scanning procedures.

84. 发明公开

EP0654684A3 Nuclear camera systems 失效
标题翻译：核摄像系统。
公开(公告)号：EP0654684A3
公开(公告)日：1995-09-06
申请号：EP94308390.7
申请日：1994-11-14
申请人： PICKER INTERNATIONAL, INC.
发明人： Morgan, Hugh T. , Thornton, Bryce G.
IPC分类号： G01T1/29 , G01T1/164 , G21K1/10
CPC分类号： A61B6/032 , A61B5/1077 , A61B6/037 , A61B6/107 , A61B6/4014 , A61B6/4417 , A61B6/4429 , A61B6/482 , A61B6/589 , A61B8/0858 , A61B8/4416 , G01T1/1615 , G01T1/1642 , G01T1/1648 , G01T1/2985 , G06T11/005 , G06T2211/432 , G21K1/025
摘要： A nuclear camera system, e.g. for medical diagnostic imaging, comprises a plurality of radiation detector heads (10a, 10b, 10c) mounted on a rotatable portion (16) of a gantry (18). A transmission radiation source and collimator assembly (40, 42) is mounted on the rotatable gantry portion opposite one of the detector heads. The radiation source (60) of the assembly is mounted in a lead shield (62) with an opening (64) pointing toward an examination region (12). A shutter (66) is rotatable between a closed position in which a lead arc segment (70) blocks the opening (64), a calibration orientation in which tin (72) covers opening (64), and an open position in which an opening (74) is aligned with the opening (64). A safety interlock means (80) locks the shutter in the closed position and against rotation when the radiation source and collimator assembly is removed from the rotatable gantry portion. The collimator (42) has lead side walls (200) and tin or tin alloy septa (202). When the radiation from the radiation source strikes the lead side walls, they emit characteristic lead x-rays of about 88 keV whereas the tin radiates x-rays of only about 30 keV. A filter (210) includes an inner layer (212) of tin for attenuating any remaining 88 keV lead x-rays coming from the transmission line source assembly and converting them to about 30 keV radiation. The filter has an outer layer (214) for attenuating the radiation around 30 keV.

85. 发明公开

EP0499253A3 Scintillation camera 失效
标题翻译： SCI摄影机
公开(公告)号：EP0499253A3
公开(公告)日：1993-12-08
申请号：EP92102415.4
申请日：1992-02-13
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kurakake, Tadakazu , Igarashi, Mikio
IPC分类号： G01T1/164 , G21K1/02 , A61B6/03 , G01T1/163 , G01T1/20 , G01T7/00
CPC分类号： G01T1/1648 , A61B6/4258
摘要： A scintillation camera (100) comprising (a) a plurality of detectors (105a, 105b, 105c) mounted on the camera and arranged to provide an opening for allowing the insertion of an object for examination such as a human being and for radiographing a tomographic image; (b) a plurality of collimators (125a, 125b, 125c) each attached to the front of the corresponding detectors for collimating X-rays radiating from the object for examination object; (c) an exchanger (120) including a carrier (121) and a holding device (123) for holding collimators in swingable manner in any direction within a certain range, using means such as a spherical bearing and a limiting pin and a pinhole.

86. 发明公开

EP0555399A1 RADIONUCLIDE ANGIOGRAPHIC COLLIMATOR SYSTEM 失效
标题翻译：准直器血管造影放射性核素。
公开(公告)号：EP0555399A1
公开(公告)日：1993-08-18
申请号：EP92901256.0
申请日：1991-10-29
申请人： SCINTICOR INCORPORATED
发明人： GRENIER, Raymond, P.
IPC分类号： G01T1 , G21K1
CPC分类号： G01T1/1648 , A61B6/4258 , G21K1/025
摘要： Ensemble collimateur de rayons gamma utilisé dans un système d'examen cardiaque. Un collimateur comporte une pluralité d'éléments collimateurs (16), les parois de collimation (18) absorbant les rayons gamma. Les parois de collimation présentent une couche de base d'une première matière (20) recouverte par une couche d'une seconde matière (22) absorbant de préférence les rayons gamma diffusés de manière non élastique générés dans la première matière.

87. 发明公开

EP0517601A1 Gamma caméra tomographique munie d'un détecteur orientable 失效
标题翻译： Tomographische Gammakamera mit ausrichtbarem Detektor。
公开(公告)号：EP0517601A1
公开(公告)日：1992-12-09
申请号：EP92401545.6
申请日：1992-06-04
申请人： SOPHA MEDICAL
发明人： Pierfitte, Michel, CABINET BALLOT-SCHMIT
IPC分类号： G01T1/166 , A61B6/00
CPC分类号： A61B6/4441 , A61B6/037 , A61B6/4258 , G01T1/1648 , G01T1/166
摘要： L'invention concerne les dispositif d'imagerie médicale par rayons gamma. Elle consiste, dans un dispositif où une gamma caméra est suspendue à un bâti (102) par une embase tournante (103), un bras (205) et deux axes (104, 207) permettant deux mouvements de rotation (X,Y) de la tête détectrice (101) de la gamma caméra par rapport à l'embase tournante, à prévoir un étrier (209) relié au bras par un troisième axe (208) permettant un troisième mouvement de rotation (Z) de cette gamma caméra. Elle permet de faciliter le positionnement relatif de la gamma caméra et du patient subissant l'examen.
摘要翻译：本发明涉及使用γ射线的医疗成像装置。它包括在伽马相机通过旋转底座（103）悬挂在框架（102）上的臂（205）和允许两个旋转运动（X，Y）的两个轴（104,207）的装置中，相对于旋转基座的伽马照相机的检测器头（101），以及通过允许该伽马照相机的第三旋转运动（Z）的第三轴（208）提供连接到臂的马镫（209）。它可以促进伽马相机和被检查的患者的相对定位。 ... ...

88. 发明公开

EP0517600A1 Procédé d'acquisition tomographique, à deux détecteurs, à centre de visée distinct du centre de rotation 失效
标题翻译：与两个检测器，其特征在于，所述遮护中心和旋转中心具有距离断层记录处理。
公开(公告)号：EP0517600A1
公开(公告)日：1992-12-09
申请号：EP92401544.9
申请日：1992-06-04
申请人： SOPHA MEDICAL
发明人： Pierfitte, Michel, CABINET BALLOT-SCHMIT , Delorme, Pierre, CABINET BALLOT-SCHMIT
IPC分类号： G01T1/166 , A61B6/00
CPC分类号： A61B6/4441 , A61B6/037 , G01T1/1648 , G01T1/166
摘要： Pour acquérir des données de mesure au cours d'une expérimentation de médecine nucléaire de type tomographique, avec une gamma caméra à deux têtes (8a-9c) détectrices, on oriente chacune de ces têtes sur un centre de visé (28) tandis que l'ensemble des deux têtes tourne autour d'un centre de rotation (2) de l'appareil : le centre de rotation étant écarté du centre de visé. On montre que cette manière de faire permet d'aller plus vite (34) d'une part pour l'acquisition et par ailleurs de contribuer à l'élaboration d'images de tomographie plus justes et plus facilement calculées.
摘要翻译：为了断层类型的核医学实验期间获取的测量数据，与具有两个探测器头一个γ照相机（8A，图9c），每个的合成头被引导在选址中心（28），同时通过合成2构成的组件绕旋转（2）的装置中，旋转中心被从选址中心分开的中心头。结果表明thatthis程序能够走得更快（34），一方面用于收购和进一步促进合作涉及的层析图像这是更准确和更容易计算。

89. 发明公开

EP0451231A1 A GANTRY AND PALLET ASSEMBLY USED IN NUCLEAR IMAGING 失效
标题翻译：住房和调色板安排用于核例证。
公开(公告)号：EP0451231A1
公开(公告)日：1991-10-16
申请号：EP90914639.0
申请日：1990-09-24
申请人： TRIONIX RESEARCH LABORATORY, INCORPORATED
发明人： LIM, Chun, Bin , WALKER, Rick, W. , SOBIN, Robert, E. , PINKSTAFF, Carlos, D.
IPC分类号： G01T1 , A61B6
CPC分类号： A61B6/0457 , G01T1/1648
摘要： Ensemble de portique (2) et de palette (90) utilisant des caméras (46) à scintillation afin d'acquérir des données émises par des agents radiopharmaceutiques préalablement administrés à un patient. Les agents radiopharmaceutiques s'accumulent dans une région étudiée prédéterminée à l'intérieur du patient. Le portique (2) peut effectuer des tomographies corps entier et des scanographies individuelles par émission photonique (SPECT). Le portique (2) comporte deux caméras (46) à scintillation montées de manière diamétralement opposée sur un anneau (24) de rotation et à proximité immédiate. Chaque caméra (46) peut être déplacée radialement par rapport à l'anneau (24) de rotation, simultanément avec la rotation de l'anneau (24). Le portique (2) peut être déplacé le long d'une paire de voies (12) de déplacement, de sorte qu'une palette (52, 54) sur laquelle un patient est allongé passe sur celle-ci. L'ensemble de palettes dispose d'un chariot de stockage, lequel supporte une palette (52) plate, sensiblement rectangulaire, sur un cadre (68) coulissant, et une palette (54) incurvée sur un ensemble (68) de prolongement. Le chariot (50) de stockage peut coulisser à l'opposé du portique (2) ou à proximité de ce dernier (2). Lorsque ledit chariot (50) de stockage est à proximité du portique (2), les deux palettes (52, 54) peuvent être facilement transférées jusqu'à un support (110, 112) de palettes réglable verticalement, utilisé pendant les examens.

90. 发明公开

EP0444324A2 Method for removing artifact and for correcting sensitivity of single photon emission computerized tomography and apparatus thereof 失效
标题翻译：在画面并用于控制Tomographes单光子发射计算机的灵敏度校正抑制噪声的方法和装置。
公开(公告)号：EP0444324A2
公开(公告)日：1991-09-04
申请号：EP90125862.4
申请日：1990-12-31
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Ichihara, Takashi
IPC分类号： G01T1/164
CPC分类号： G01T1/1648
摘要： In a single photon emission computerized tomographic (SPECT) image acquiring method by receiving via a fan-beam collimator (7) radiation emitted from a radio isotope (RI) supplied into a biological body under medical examination with employment of a gamma camera (8), there are provided the steps of: acquring first projection image data by receiving via the fan-beam collimator (7) radiation emitted from reference RI source means (9); processing said first projection image data to obtain first correction data; acquiring second projection image data by receiving via said fan-beam collimator (7) said radiation emitted from said radio isotope injected into the biological body; correcting said second projection image data with said first correction data so as to obtain third projection image data from which an artifact component has been eliminated; and, reconstructing a SPECT image of the biological body under medical examination based upon said third projection image data free from the artifact component.
摘要翻译：在单光子发射计算机断层扫描（SPECT）图像通过经由扇形束准直仪（7）的辐射下，从医疗检查供给到生物体的采用γ照相机的放射性同位素（RI）接收发射的获取方法（8）中，提供的以下步骤：通过经由扇形束准直器接收acquring第一投影图像数据从参考RI源装置（7）发射的辐射（9）; 处理所述第一投影图像数据，以获得第一校正数据; 通过经由所述扇形束准直器接收获取第二投影图像数据（7）从所述发射的辐射的放射性同位素注射到生物体; 所述校正与所述第一校正数据的第二投影图像数据，以便获得第三投影图像数据从其中伪影分量已被消除; 中，并且在基于从所述伪影分量自由第三投影图像数据体检重建生物体的SPECT图像。

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