-
1.发明授权X-ray computerized tomograph including collimator that restricts irradiation range of X-ray fan beam 失效X射线计算机断层扫描仪包括限制X射线扇形束的照射范围的准直仪公开(公告)号：US06445761B1
公开(公告)日：2002-09-03
申请号：US09380824
申请日：1999-09-10
申请人： Osamu Miyazaki , Tetsuo Nakazawa , Yoshihiro Goto
发明人： Osamu Miyazaki , Tetsuo Nakazawa , Yoshihiro Goto
IPC分类号： A61B600
摘要： An X-ray CT apparatus including a collimator that restricts an irradiation range of an X-ray fan beam, in which first projection data is obtained with no restriction placed onto the X-ray irradiation range through the collimator, then, second projection data is obtained with the X-ray irradiation range restricted in accordance with a concerned region set on a tomographic image, and when reconstructing an image with the use of the second projection data, the image is reconstructed using, as data outside of the concerned region, data of a corresponding portion of the first projection data.
摘要翻译： 一种X射线CT装置，其包括限制X射线扇形束的照射范围的准直仪，其中通过准直器不受限于X射线照射范围获得第一投影数据，然后第二投影数据是 所述X射线照射范围根据设置在断层图像上的相关区域而被限制，并且当使用所述第二投影数据重建图像时，使用作为所述相关区域外的数据的数据来重构所述图像 的第一投影数据的对应部分。
-
公开(公告)号：US20100019156A1
公开(公告)日：2010-01-28
申请号：US12442149
申请日：2007-09-19
CPC分类号： G01T1/1642
摘要： A nuclear medicine diagnosis apparatus comprising a mechanical collimator for effecting passage in a given direction of photons with given energy emitted from an object injected or dosed with a drug containing a radioactive isotope; a former-stage detector for detecting positional information at a point of reaction of photons having passed through the mechanical collimator and information on the momentum of charged particles generated by the reaction; a latter-stage detector disposed in the subsequent stage of the former-stage detector to detect information on the photons having been scattered by the former-stage detector; and image reconstruction means for reconstructing an image from detection information having been collected from the former-stage detector and latter-stage detector, wherein the image reconstruction means is built so that differentiation is carried out on the information on the photons having passed through the mechanical collimator and the information on the photons having been scattered by the former-stage detector and that the image reconstruction is carried out by different image reconstruction algorithms from the individual differentiated detection information.
摘要翻译： 一种核医学诊断装置，包括机械准直器，用于在给定的光子的方向上进行通过，所述能量具有从注射或计量的含有放射性同位素的药物的物体发射的给定能量; 用于检测通过机械准直器的光子的反应点的位置信息的前级检测器和由反应产生的带电粒子的动量的信息; 后级检测器，设置在前级检测器的后级中，以检测由前级检测器散射的光子的信息; 以及用于从前级检测器和后级检测器收集的检测信息重构图像的图像重建装置，其中构建图像重建装置，以便对已经通过机械的光子的信息进行区分 准直仪和由前级检测器分散的光子的信息，并且通过来自各个差分检测信息的不同的图像重建算法执行图像重建。
-
公开(公告)号：US20090304141A1
公开(公告)日：2009-12-10
申请号：US12298115
申请日：2007-03-08
IPC分类号： H05G1/60
CPC分类号： G01T1/2985 , A61B6/032 , A61B6/4241 , A61B6/482 , G01T1/2935
摘要： The photon counting type detector 122 includes a drift electrode 122a, an MSGC 122b provided at a prescribed interval and a drift region 122c formed by sealing gas between the drift electrode 122a and the MSGC 122b. The projection data outputted from the photon counting type detector 122 is discriminated by the discrimination circuit 162 for each of X-ray energies and a CT image is reconstructed based on the projection data after discrimination, thereby providing an energy discrimination type X-ray CT apparatus capable of improving image quality at lower cost.
摘要翻译： 光子计数型检测器122包括以规定间隔设置的漂移电极122a，MSGC 122b以及通过密封漂移电极122a与MSGC 122b之间的气体形成的漂移区域122c。 从光子计数型检测器122输出的投影数据由识别电路162对于每个X射线能量进行鉴别，并且基于鉴别之后的投影数据重建CT图像，从而提供能量鉴别型X射线CT装置 能够以更低的成本提高图像质量。
-
公开(公告)号：US20060140337A1
公开(公告)日：2006-06-29
申请号：US10544907
申请日：2004-02-13
申请人： Osamu Miyazaki , Tetsuo Nakazawa , Hiroto Kokubun
发明人： Osamu Miyazaki , Tetsuo Nakazawa , Hiroto Kokubun
CPC分类号： A61B6/032 , A61B6/027 , A61B6/5288 , A61B6/542
摘要： An X-ray CT apparatus comprises: motion information acquisition means that acquires periodical motion information on a motion portion of an object to be examined; a detector that rotates together with an X-ray source and detects X-rays applied to the object from the X-ray source to acquire projection data per collection region; and reconstruction means that processes the projection data resulting from the detector to reconstruct a tomogram of the object, wherein the X-ray CT apparatus further includes delay time determination means that determines a delay time by adding a time width of the collection region and a processing delay time in the X-ray CT apparatus and a time interval from the moment when the phase of the measured periodical motion information is matched with the phase of the rotation period of the X-ray CT apparatus to the moment when they are matched next time, and collection means that correlates, with the periodical motion information obtained by the motion information acquisition means, and successively collects the projection data obtained from the detector, with the reconstruction means starting reconstruction of the tomogram after the delay time.
摘要翻译： X射线CT装置包括：运动信息获取装置，其获取关于待检查对象的运动部分的周期运动信息; 检测器，其与X射线源一起旋转，并且检测从X射线源施加到物体的X射线以获取每个收集区域的投影数据; 并且重建装置处理由检测器产生的投影数据，以重构物体的断层图像，其中，所述X射线CT装置还包括延迟时间确定装置，其通过加入所述收集区域的时间宽度和处理来确定延迟时间 X射线CT装置的延迟时间和从测定的周期运动信息的相位与X射线CT装置的旋转周期的相位相匹配的时刻到下一次匹配的时刻 以及与由运动信息获取装置获得的周期运动信息相关联的收集装置，并且连续地收集从检测器获得的投影数据，重建装置在延迟时间之后开始重建断层图像。
-
公开(公告)号：US20050069081A1
公开(公告)日：2005-03-31
申请号：US10496420
申请日：2002-11-28
申请人： Hiroto Kokubun , Tetsuo Nakazawa , Osamu Miyazaki
发明人： Hiroto Kokubun , Tetsuo Nakazawa , Osamu Miyazaki
CPC分类号： A61B6/541 , A61B6/027 , A61B6/032 , A61B6/4085 , A61B6/503 , Y10S378/901
摘要： In an X-ray CT apparatus having a multi-slice detector, the retrospective ECG (Electrocardiography) gating imaging is applied to helical scans. Discontinuity of projection data generated in the scans is interpolated using data at a heartbeat time phase in 180-degree opposite relation to reduce motion artifacts. Further, projection data at an arbitrary slicing position and in at arbitrary heartbeat time phase are formed utilizing continuous divided projection data obtained above, and by properly combining or gathering them, a tomogram of whole heart, a three-dimensional image thereof, and further, a three-dimensional cardiac moving image in heartbeat time phases with an arbitrary time interval can be continuously and smoothly created.
摘要翻译： 在具有多切片检测器的X射线CT装置中，回顾性ECG（心电图）门控成像应用于螺旋扫描。 在扫描中产生的投影数据的不连续性使用180度相对关系的心跳时间相位上的数据进行内插，以减少运动伪像。 此外，利用上面获得的连续划分的投影数据，并且通过适当地组合或收集全心脏的断层图像及其三维图像，形成任意切片位置和任意心跳时间相位的投影数据， 可以连续平稳地创建具有任意时间间隔的心跳时间相位的三维心脏运动图像。
-
公开(公告)号：US5987091A
公开(公告)日：1999-11-16
申请号：US897530
申请日：1997-07-21
申请人： Osamu Miyazaki , Shinichi Migita , Tetsuo Nakazawa
发明人： Osamu Miyazaki , Shinichi Migita , Tetsuo Nakazawa
CPC分类号： G06T11/005 , Y10S378/901
摘要： Projection data having a phase difference of 180.degree. from each other, which are obtained through a 1/4 offset detector, are arranged alternately to obtain projection data of the high resolution, and a CT image is reconstructed on the basis of the projection data of the high resolution. Opposition difference data showing the difference between the projection data having the phase difference of 180.degree. from each other and having a phase difference of 180.degree. from each other are alternately arranged to obtain the opposition difference data of the high resolution, and an opposition difference image is reconstructed on the basis of the opposition difference data of the high resolution. Then, distortion components showing the high-frequency component are extracted from the aforesaid opposition difference image, and the aforesaid reconstructed CT image is corrected by the thus extracted distortion components, so that motion artifacts contained in the original CT image can be reduced.
摘要翻译： 通过+ E，fra 1/4 + EE偏移检测器获得的相位差为180度的投影数据交替排列以获得高分辨率的投影数据，并且在 高分辨率投影数据的基础。 交替地布置表示彼此具有180度的相位差并具有180度的相位差的投影数据之间的差异的反差差数据，以获得高分辨率的对数差分数据和对置差分图像 基于高分辨率的对数差分数据重建。 然后，从上述对立差分图像中提取示出高频分量的失真分量，并且通过这样提取的失真分量校正上述重建的CT图像，从而可以减少包含在原始CT图像中的运动伪影。
-
公开(公告)号：US07750308B2
公开(公告)日：2010-07-06
申请号：US12304284
申请日：2007-06-11
IPC分类号： G01T1/20
CPC分类号： G01T1/1642 , A61B6/4258
摘要： A Compton camera device according to the invention includes first means for reading coordinate data of a scattering point of a quantum ray detected by a pre-stage detector for each Compton scattering event, second means for reading coordinate data of a reaching point of the Compton-scattered quantum ray detected by a post-stage detector for each Compton scattering event, and third means for calculating a measurement accuracy of the scattered quantum ray by the first and second means for each Compton scattering event, calculating a statistical quantity of the quantum ray for each calculated measurement accuracy, and outputting the calculated statistical quantity to image reconstruction means.
摘要翻译： 根据本发明的康普顿相机装置包括用于读取由每个康普顿散射事件由前级检测器检测到的量子射线的散射点的坐标数据的第一装置，用于读取康普顿散射事件的到达点的坐标数据的第二装置， 用于每个康普顿散射事件由后级检测器检测的散射量子射线;以及第三装置，用于通过第一和第二装置针对每个康普顿散射事件计算散射量子射线的测量精度，计算量子射线的统计量 每个计算出的测量精度，并将计算的统计量输出到图像重建装置。
-
公开(公告)号：US07426255B2
公开(公告)日：2008-09-16
申请号：US10544907
申请日：2004-02-13
申请人： Osamu Miyazaki , Tetsuo Nakazawa , Hiroto Kokubun
发明人： Osamu Miyazaki , Tetsuo Nakazawa , Hiroto Kokubun
IPC分类号： H05G1/60
CPC分类号： A61B6/032 , A61B6/027 , A61B6/5288 , A61B6/542
摘要： An X-ray CT apparatus comprises: motion information acquisition means that acquires periodical motion information on a motion portion of an object to be examined; a detector that rotates together with an X-ray source and detects X-rays applied to the object from the X-ray source to acquire projection data per collection region; and reconstruction means that processes the projection data resulting from the detector to reconstruct a tomogram of the object, wherein the X-ray CT apparatus further includes delay time determination means that determines a delay time by adding a time width of the collection region and a processing delay time in the X-ray CT apparatus and a time interval from the moment when the phase of the measured periodical motion information is matched with the phase of the rotation period of the X-ray CT apparatus to the moment when they are matched next time, and collection means that correlates, with the periodical motion information obtained by the motion information acquisition means, and successively collects the projection data obtained from the detector, with the reconstruction means starting reconstruction of the tomogram after the delay time.
摘要翻译： X射线CT装置包括：运动信息获取装置，其获取关于待检查对象的运动部分的周期运动信息; 检测器，其与X射线源一起旋转，并且检测从X射线源施加到物体的X射线以获取每个收集区域的投影数据; 并且重建装置处理由检测器产生的投影数据，以重构物体的断层图像，其中，所述X射线CT装置还包括延迟时间确定装置，其通过加入所述收集区域的时间宽度和处理来确定延迟时间 X射线CT装置的延迟时间和从测定的周期运动信息的相位与X射线CT装置的旋转周期的相位相匹配的时刻到下一次匹配的时刻 以及与由运动信息获取装置获得的周期运动信息相关联的收集装置，并且连续地收集从检测器获得的投影数据，重建装置在延迟时间之后开始重建断层图像。
-
公开(公告)号：US07999235B2
公开(公告)日：2011-08-16
申请号：US12442149
申请日：2007-09-19
IPC分类号： G01T1/161
CPC分类号： G01T1/1642
摘要： A nuclear medicine diagnosis apparatus comprising a mechanical collimator for effecting passage in a given direction of photons with given energy emitted from an object injected or dosed with a drug containing a radioactive isotope; a former-stage detector for detecting positional information at a point of reaction of photons having passed through the mechanical collimator and information on the momentum of charged particles generated by the reaction; a latter-stage detector disposed in the subsequent stage of the former-stage detector to detect information on the photons having been scattered by the former-stage detector; and image reconstruction means for reconstructing an image from detection information having been collected from the former-stage detector and latter-stage detector, wherein the image reconstruction means is built so that differentiation is carried out on the information on the photons having passed through the mechanical collimator and the information on the photons having been scattered by the former-stage detector and that the image reconstruction is carried out by different image reconstruction algorithms from the individual differentiated detection information.
摘要翻译： 一种核医学诊断装置，包括机械准直器，用于在给定的光子的方向上进行通过，所述能量具有从注射或计量的含有放射性同位素的药物的物体发射的给定能量; 用于检测通过机械准直器的光子的反应点的位置信息的前级检测器和由反应产生的带电粒子的动量的信息; 后级检测器，设置在前级检测器的后级中，以检测由前级检测器散射的光子的信息; 以及用于从前级检测器和后级检测器收集的检测信息重构图像的图像重建装置，其中构建图像重建装置，以便对已经通过机械的光子的信息进行区分 准直仪和由前级检测器分散的光子的信息，并且通过来自各个差分检测信息的不同的图像重建算法执行图像重建。
-
公开(公告)号：US20090202041A1
公开(公告)日：2009-08-13
申请号：US12304284
申请日：2007-06-11
IPC分类号： G01N23/201 , G01T1/20
CPC分类号： G01T1/1642 , A61B6/4258
摘要： A Compton camera device according to the invention includes first means for reading coordinate data of a scattering point of a quantum ray detected by a pre-stage detector for each Compton scattering event, second means for reading coordinate data of a reaching point of the Compton-scattered quantum ray detected by a post-stage detector for each Compton scattering event, and third means for calculating a measurement accuracy of the scattered quantum ray by the first and second means for each Compton scattering event, calculating a statistical quantity of the quantum ray for each calculated measurement accuracy, and outputting the calculated statistical quantity to image reconstruction means.
摘要翻译： 根据本发明的康普顿相机装置包括用于读取由每个康普顿散射事件由前级检测器检测到的量子射线的散射点的坐标数据的第一装置，用于读取康普顿散射事件的到达点的坐标数据的第二装置， 用于每个康普顿散射事件由后级检测器检测的散射量子射线;以及第三装置，用于通过第一和第二装置针对每个康普顿散射事件计算散射量子射线的测量精度，计算量子射线的统计量 每个计算出的测量精度，并将计算的统计量输出到图像重建装置。
-
-
-
-
-
-
-
-
-
搜索结果
124 条记录 (耗时 0.022 秒)
