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1. 发明授权

US07085343B2 X-ray computed tomography apparatus 有权
公开(公告)号：US07085343B2
公开(公告)日：2006-08-01
申请号：US10272014
申请日：2002-10-17
申请人： Toshiyuki Shinno , Yuji Yanagida , Shigeyuki Nakashima , Yoshiaki Yaoi , Miwa Okumura , Minoru Horinouchi , Masahiko Yamazaki , Machiko Iso , Satoru Nakanishi
发明人： Toshiyuki Shinno , Yuji Yanagida , Shigeyuki Nakashima , Yoshiaki Yaoi , Miwa Okumura , Minoru Horinouchi , Masahiko Yamazaki , Machiko Iso , Satoru Nakanishi
IPC分类号： A61B6/00 , G01N23/00 , G21K1/12 , H05G1/60
CPC分类号： A61B6/032 , A61B6/027 , A61B6/4014 , A61B6/4488 , A61B6/586
摘要： An X-ray computed tomography apparatus of this invention includes a first data detecting system which includes a first X-ray tube and a first X-ray detector and a second data detecting system which includes a second X-ray tube and a second X-ray detector. A reconstructing unit reconstructs image data on the basis of the data detected by at least one of the first and second data detecting systems. A monitoring unit monitors the first data detecting system. In a period during which the first data detecting system is normal, data acquisition is performed by both the first and second data detecting systems. In a period during which the first data detecting system is faulty, data acquisition is performed by the second data detecting system alone.

2. 发明授权

US06947516B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US06947516B2
公开(公告)日：2005-09-20
申请号：US10077819
申请日：2002-02-20
申请人： Miwa Okumura , Masahiko Yamazaki , Satoru Nakanishi , Toshihiro Rifu , Souji Miyashita
发明人： Miwa Okumura , Masahiko Yamazaki , Satoru Nakanishi , Toshihiro Rifu , Souji Miyashita
IPC分类号： G01T7/00 , A61B6/03 , G01T1/20 , G06T1/00 , A61B6/00
CPC分类号： A61B6/032 , A61B6/027
摘要： An X-ray apparatus including an X-ray source, a rotation mechanism which rotates the X-ray source about a rotational axis, and an X-ray detector having a plurality of detection elements. A blocking member defining a slit structure is provided between the X-ray source and the X-ray detector. The slits of the blocking member include two rows aligned in a channel direction of the detector elements, and two rows staggered in the channel direction, thereby to obtain a CT image with improved spatial resolution. Alternatively, instead of using a blocking member, some of the detection elements of at least one detection segment are staggered in the channel direction with respect to detection elements of another detection segment.
摘要翻译：一种X射线设备，包括X射线源，使X射线源围绕旋转轴线旋转的旋转机构和具有多个检测元件的X射线检测器。限定狭缝结构的阻挡构件设置在X射线源和X射线检测器之间。阻挡构件的狭缝包括在检测器元件的通道方向上排列的两列，并且在通道方向上交错排列的两列，从而获得具有改善的空间分辨率的CT图像。或者，代替使用阻挡构件，至少一个检测段的一些检测元件相对于另一个检测段的检测元件在通道方向上错开。

3. 发明授权

US07920671B2 X-ray CT apparatus and control method of X-ray CT apparatus 有权
标题翻译： X射线CT装置及X射线CT装置的控制方法
公开(公告)号：US07920671B2
公开(公告)日：2011-04-05
申请号：US12566247
申请日：2009-09-24
申请人： Miwa Okumura , Satoru Nakanishi
发明人： Miwa Okumura , Satoru Nakanishi
IPC分类号： A61B6/00
CPC分类号： A61B6/4233 , A61B6/032 , A61B6/4085
摘要： An X-ray CT apparatus has a setting unit, a generating unit, a calculation unit, and a determination unit. The setting unit sets a required width of a group of X-ray detection elements in a row direction, which is relatively insusceptible to an influence of a cone angle of a cone-beam X-ray. The generating unit generates accumulation data by accumulating first projection data, based on first X-ray detection elements within the required width included in the group, with same channel in the row direction in preference to second projection data based on second X-ray detection elements outside the required width included in the group. The calculation unit obtains a motion amount for each heartbeat phase based on the accumulation data. The determination unit determines a specific heartbeat phase based on the motion amount for the each heartbeat phase.
摘要翻译： X射线CT装置具有设定部，生成部，计算部以及判定部。设置单元设置一组X射线检测元件在行方向上的所需宽度，这对于锥形束X射线的锥角的影响是相对不易察觉的。生成单元优先于基于第二X射线检测元件的第二投影数据，通过累积第一投影数据，基于组中包含的所需宽度内的第一X射线检测元件，在行方向上具有相同的通道，在组中包含的所需宽度之外。计算单元基于积累数据获得每个心跳相位的运动量。确定单元基于每个心跳阶段的运动量确定特定的心跳相位。

4. 发明申请

US20060210014A1 X-ray CT apparatus and data detecting method of X-ray CT apparatus 失效
标题翻译： X射线CT装置X射线CT装置及数据检测方法
公开(公告)号：US20060210014A1
公开(公告)日：2006-09-21
申请号：US11367324
申请日：2006-03-06
申请人： Miwa Okumura , Satoru Nakanishi , Masaharu Tsuyuki , Yasuo Saito
发明人： Miwa Okumura , Satoru Nakanishi , Masaharu Tsuyuki , Yasuo Saito
IPC分类号： A61B6/00 , G01N23/00 , G21K1/12 , H05G1/60
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/405 , A61B6/482 , G06T11/006 , G06T2211/412
摘要： An X-ray CT apparatus comprises three X-ray generating units, three groups of detecting elements and a reconstructing unit. The three X-ray generating units are arranged so as to make an angle formed by a first X-ray exposure direction and a second X-ray exposure direction on a rotational plane thereof be a same angle as that formed by the second X-ray exposure direction and a third X-ray exposure direction on the rotational plane, the same angle being smaller than 120 degree. The three groups of detecting elements are arranged opposite to the three X-ray generating units respectively so as to make a field of view formed in a center wider than two side fields of view. The reconstructing unit is configured to reconstruct an image using detection data detected by at least desired one of the three groups of the detecting elements.
摘要翻译： X射线CT装置包括三个X射线产生单元，三组检测元件和重建单元。三个X射线产生单元被布置成使得其旋转平面上由第一X射线曝光方向和第二X射线曝光方向形成的角度与由第二X射线曝光方向和旋转平面上的第三X射线曝光方向，相同的角度小于120度。三组检测元件分别与三个X射线产生单元相对地布置，以便形成在比两个侧视场宽的中心的视场。重建单元被配置为使用由三组检测元件中的至少期望的一组检测的检测数据来重建图像。

5. 发明申请

US20100111393A1 X-RAY CT APPARATUS AND CONTROL METHOD OF X-RAY CT APPARATUS 有权
标题翻译： X射线CT装置的X射线CT装置和控制方法
公开(公告)号：US20100111393A1
公开(公告)日：2010-05-06
申请号：US12566247
申请日：2009-09-24
申请人： Miwa Okumura , Satoru Nakanishi
发明人： Miwa Okumura , Satoru Nakanishi
IPC分类号： G06K9/00 , H05G1/60
CPC分类号： A61B6/4233 , A61B6/032 , A61B6/4085
摘要： An X-ray CT apparatus has a setting unit, a generating unit, a calculation unit, and a determination unit. The setting unit sets a required width of a group of X-ray detection elements in a row direction, which is relatively insusceptible to an influence of a cone angle of a cone-beam X-ray. The generating unit generates accumulation data by accumulating first projection data, based on first X-ray detection elements within the required width included in the group, with same channel in the row direction in preference to second projection data based on second X-ray detection elements outside the required width included in the group. The calculation unit obtains a motion amount for each heartbeat phase based on the accumulation data. The determination unit determines a specific heartbeat phase based on the motion amount for the each heartbeat phase.
摘要翻译： X射线CT装置具有设定部，生成部，计算部以及判定部。设置单元设置一组X射线检测元件在行方向上的所需宽度，这对于锥形束X射线的锥角的影响是相对不易察觉的。生成单元优先于基于第二X射线检测元件的第二投影数据，通过累积第一投影数据，基于组中包含的所需宽度内的第一X射线检测元件，在行方向上具有相同的通道，在组中包含的所需宽度之外。计算单元基于积累数据获得每个心跳相位的运动量。确定单元基于每个心跳阶段的运动量确定特定的心跳相位。

6. 发明授权

US07421062B2 X-ray CT apparatus and data detecting method of X-ray CT apparatus 失效
标题翻译： X射线CT装置X射线CT装置及数据检测方法
公开(公告)号：US07421062B2
公开(公告)日：2008-09-02
申请号：US11367324
申请日：2006-03-06
申请人： Miwa Okumura , Satoru Nakanishi , Masaharu Tsuyuki , Yasuo Saito
发明人： Miwa Okumura , Satoru Nakanishi , Masaharu Tsuyuki , Yasuo Saito
IPC分类号： H05G1/58 , G01N23/083
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/405 , A61B6/482 , G06T11/006 , G06T2211/412
摘要： An X-ray CT apparatus comprises three X-ray generating units, three groups of detecting elements and a reconstructing unit. The three X-ray generating units are arranged so as to make an angle formed by a first X-ray exposure direction and a second X-ray exposure direction on a rotational plane thereof be a same angle as that formed by the second X-ray exposure direction and a third X-ray exposure direction on the rotational plane, the same angle being smaller than 120 degree. The three groups of detecting elements are arranged opposite to the three X-ray generating units respectively so as to make a field of view formed in a center wider than two side fields of view. The reconstructing unit is configured to reconstruct an image using detection data detected by at least desired one of the three groups of the detecting elements.
摘要翻译： X射线CT装置包括三个X射线产生单元，三组检测元件和重建单元。三个X射线产生单元被布置成使得其旋转平面上由第一X射线曝光方向和第二X射线曝光方向形成的角度与由第二X射线曝光方向和旋转平面上的第三X射线曝光方向，相同的角度小于120度。三组检测元件分别与三个X射线产生单元相对地布置，以便形成在比两个侧视场宽的中心的视场。重建单元被配置为使用由三组检测元件中的至少期望的一组检测的检测数据来重建图像。

7. 发明授权

US06917665B2 X-ray computed tomography apparatus 有权
标题翻译： X射线计算机断层摄影装置
公开(公告)号：US06917665B2
公开(公告)日：2005-07-12
申请号：US10283103
申请日：2002-10-30
申请人： Satoru Nakanishi , Keiji Matsuda , Yasutaka Shindo , Miwa Okumura
发明人： Satoru Nakanishi , Keiji Matsuda , Yasutaka Shindo , Miwa Okumura
IPC分类号： A61B6/00 , A61B6/03 , G01N23/00
CPC分类号： A61B6/587 , A61B6/032 , A61B6/4085 , A61B6/542 , A61B6/56
摘要： An X-ray computed tomography apparatus for providing information of alignment, comprises an X-ray generator, an X-ray detector, and a controller. The X-ray generator generates an X-ray. The X-ray detector comprises a plurality of detecting segments in a slice direction and detects the X-ray generated by the X-ray generator. The controller provides the information of alignment between the X-ray generator and the X-ray detector in the slice direction on the basis of a detection information obtained from at least two of the detecting segments, wherein each of the at least two of the detecting segments is at least partially covered by a penumbra of the X-ray.
摘要翻译：一种用于提供对准信息的X射线计算机断层摄影装置，包括X射线发生器，X射线检测器和控制器。 X射线发生器产生X射线。 X射线检测器包括沿切片方向的多个检测段，并且检测由X射线发生器产生的X射线。控制器基于从至少两个检测段获得的检测信息，在切片方向上提供X射线发生器和X射线检测器之间的对准信息，其中检测器中的至少两个检测片段至少部分地被X射线的半影覆盖。

8. 发明授权

US06778628B2 X-ray computed tomography apparatus 失效
标题翻译： X射线计算机断层摄影装置
公开(公告)号：US06778628B2
公开(公告)日：2004-08-17
申请号：US10401680
申请日：2003-03-31
申请人： Masahiko Yamazaki , Miwa Okumura , Shinsuke Tsukagoshi
发明人： Masahiko Yamazaki , Miwa Okumura , Shinsuke Tsukagoshi
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/4014 , A61B6/4085 , A61B6/4266 , A61B6/463 , A61B6/467 , A61B6/542 , A61B6/583 , Y10S378/901
摘要： An X-ray computed tomography apparatus is provided to reconstruct image data based on projection data acquired by scanning a subject with an X-ray. A calculator is configured to calculate a dose efficiency index based on an expected dose of an X-ray radiated from an input device. The dose efficiency index indicates a diameter of a target which is identified at a predetermined detectability rate and has a predetermined CT value difference with respect to a surrounding CT value. A plan support system is configured to build up a scan planning screen on which the input expected dose is contained along with the calculated dose efficiency index. The scan planning screen is displayed on a display.
摘要翻译：提供X射线计算机断层摄影装置，用于基于通过用X射线扫描对象获取的投影数据来重建图像数据。计算器被配置为基于从输入设备辐射的X射线的预期剂量来计算剂量效率指数。剂量效率指数表示以预定的检测率被识别并且相对于周围CT值具有预定的CT值差的目标的直径。计划支持系统被配置为建立扫描计划屏幕，其中包含输入预期剂量以及计算的剂量效率指数。扫描计划画面显示在显示屏上。

9. 发明授权

US08379792B2 X-ray CT apparatus 有权
标题翻译： X射线CT装置
公开(公告)号：US08379792B2
公开(公告)日：2013-02-19
申请号：US12542186
申请日：2009-08-17
申请人： Yasuo Saito , Miwa Okumura
发明人： Yasuo Saito , Miwa Okumura
IPC分类号： H05G1/62 , H05G1/10 , G01N23/083
CPC分类号： A61B6/032 , A61B5/113 , A61B6/027
摘要： According to the present invention, a subject is prompted to take breaths that are different at least in depth, and the subject's motion associated with respiration is captured. A timing when the subject is scanned is controlled according to the captured motion of the subject associated with respiration. A two-dimensional detector formed like a two-dimensional plane detects an X-ray beam having passed through the subject. Data is collected from the two-dimensional detector to acquire volume data on the subject.
摘要翻译：根据本发明，促使受试者至少进行深度不同的呼吸，并且捕获受试者与呼吸相关的动作。根据与呼吸相关的受试者的捕获的运动来控制被摄体被扫描的时间。形成为二维平面的二维检测器检测穿过被检体的X射线束。从二维检测器收集数据以获取关于受试者的体数据。

10. 发明申请

US20090028289A1 X-RAY CT APPARATUS 有权
标题翻译： X射线CT装置
公开(公告)号：US20090028289A1
公开(公告)日：2009-01-29
申请号：US12177262
申请日：2008-07-22
申请人： Masaharu TSUYUKI , Miwa Okumura , Yasuko Fujisawa
发明人： Masaharu TSUYUKI , Miwa Okumura , Yasuko Fujisawa
IPC分类号： A61B6/00
CPC分类号： A61B6/481 , A61B6/032 , A61B6/463 , A61B6/465 , A61B6/503 , A61B6/504 , A61B6/541
摘要： A CT value of an image within a region of interest is calculated with time. While the calculated CT value does not exceed a predetermined threshold value, a reconstruction mode used when an image is reconstructed from projection data is set to half reconstruction. On the other hand, while the calculated CT value exceeds a predetermined threshold value, the reconstruction mode is set to segment reconstruction.
摘要翻译：计算感兴趣区域内的图像的CT值。当计算的CT值不超过预定阈值时，将从投影数据重建图像时使用的重建模式设置为半重构。另一方面，当计算的CT值超过预定阈值时，将重建模式设置为分段重建。

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