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21. 发明授权

US09820712B2 Radiation imaging apparatus and control method and program of the apparatus 有权
公开(公告)号：US09820712B2
公开(公告)日：2017-11-21
申请号：US15264273
申请日：2016-09-13
申请人： CANON KABUSHIKI KAISHA
发明人： Takashi Takasaki
IPC分类号： A61B6/00
CPC分类号： A61B6/5205 , A61B6/40 , A61B6/405 , A61B6/42 , A61B6/461 , A61B6/465 , A61B6/469 , A61B6/481 , A61B6/482 , A61B6/486 , A61B6/5211 , A61B6/5217 , A61B6/54 , A61B6/542 , A61B6/545
摘要： An energy control unit continuously adjusts energy of radiations in one shot emitted by an X-ray irradiation unit. An X-ray detection unit generates a plurality of image data pieces in one shot by detecting the radiations whose energy is continuously adjusted and transmitted through a subject. An image classification unit classifies the plurality of image data pieces generated by the X-ray detection unit into image data generated by the radiations of a high energy side and image data generated by the radiations of a low energy side. An image subtraction unit performs weighting and subtraction on the image data generated by the radiations of the high energy side and the image data generated by the radiations of the low energy side.

22. 发明授权

US09801594B2 Ebeam tomosynthesis for radiation therapy tumor tracking 有权
公开(公告)号：US09801594B2
公开(公告)日：2017-10-31
申请号：US14288021
申请日：2014-05-27
申请人： Imatrex Inc.
发明人： Douglas P. Boyd , Samuel M. Song , Roy E. Rand , Larry Partain , Junghyun Kwon
IPC分类号： A61N5/10 , A61B6/03 , H01J35/14 , H01J35/30 , H05G1/52 , A61B6/00 , H01J37/147 , A61B6/02 , A61N5/06
CPC分类号： A61B6/405 , A61B6/025 , A61B6/541 , A61B6/542 , A61N5/1048 , A61N5/1049 , A61N2005/0632 , A61N2005/1061 , H01J35/14 , H01J35/30 , H01J37/147 , H05G1/52
摘要： A system for tracking tumors during radiotherapy by interleaving treatment pulses with imaging pulses is disclosed. The system includes a multisource scanning eBeam X-ray tube having a plurality of focal spots. The X-ray tube is configured to emit X-rays to a plurality of different locations on a target by sequentially emitting the X-rays to the focal spots in the plurality of focal spots. This is done such that the X-rays can be emitted to the plurality of different locations on the target without substantially moving the X-ray tube or the target. The system further includes an imager panel configured to act as the target and configured to receive the X-rays from the focal spots of the X-ray tube. The system further includes a tomosynthesis reconstruction module configured to process output from the imager panel to construct an image.

23. 发明授权

US09687207B2 Pre-reconstruction calibration, data correction, and material decomposition method and apparatus for photon-counting spectrally-resolving X-ray detectors and X-ray imaging 有权
公开(公告)号：US09687207B2
公开(公告)日：2017-06-27
申请号：US14676594
申请日：2015-04-01
申请人： TOSHIBA MEDICAL SYSTEMS CORPORATION
发明人： Yu Zou , Xiaolan Wang , Adam Petschke , Chunguang Cao , Yuexing Zhang
IPC分类号： A61B6/03 , A61B6/00 , G06T11/00
CPC分类号： A61B6/585 , A61B6/032 , A61B6/405 , A61B6/4241 , A61B6/4266 , A61B6/482 , A61B6/5205 , G06T11/005 , G06T2211/408
摘要： An apparatus and method of processing X-ray projection data obtained using photon-counting detectors and having multiple spectral components. The processing of the projection data includes correcting for nonlinear detector response, where the detector response model includes: pileup, ballistic deficit effects, polar effects, and characteristic X-ray escape. The processing of the projection data also includes a material decomposition mapping the projection data from spectral components into material components corresponding to high-Z and low-Z materials. The material decomposition includes a noise balancing process where the allocation of spectral components between a high-energy and a low-energy combination of spectral components is adjusted such that both high- and low-energy components have signal-to-noise ratios of similar magnitude. For computed tomography (CT) applications, material decomposition can be followed by image reconstruction and then image post-processing and presentation. For non-CT applications, material decomposition can be followed by image post-processing and presentation.

24. 发明申请

US20170172528A1 MULTI-ENERGY X-RAY IMAGING 有权
公开(公告)号：US20170172528A1
公开(公告)日：2017-06-22
申请号：US14977086
申请日：2015-12-21
申请人： General Electric Company
发明人： Uwe Wiedmann , Peter Michael Edic , Bruno Kristiaan Bernard De Man , Naveen Stephan Chandra , Jed Douglas Pack , Yannan Jin , Denis Perrillat-Amede , Jean- Francois Larroux
IPC分类号： A61B6/00 , A61B6/03
CPC分类号： A61B6/482 , A61B6/032 , A61B6/405 , A61B6/5205 , A61B6/5258
摘要： Acquisition of X-ray transmission data at three or more energy levels is described. Various implementations utilize generator waveforms that utilize fast-switching, slow-switching, or a combination of fast- and slow-switching to transition between X-ray energy levels. In addition, various sampling arrangements for sampling and/or binning three or more energy levels of X-ray transmission data are discussed. The use of these data in subsequent processing steps, such for material decomposition and/or improvement of dual-energy material decomposition processing, are also described.

25. 发明授权

US09655567B2 Radiation diagnostic apparatus, X-ray computed tomography apparatus, and image processing method 有权
公开(公告)号：US09655567B2
公开(公告)日：2017-05-23
申请号：US12696478
申请日：2010-01-29
申请人： Makoto Takanaka , Takuya Sakaguchi , Masanori Matsumoto , Masaki Kobayashi , Satoshi Yamashita , Shumpei Oohashi
发明人： Makoto Takanaka , Takuya Sakaguchi , Masanori Matsumoto , Masaki Kobayashi , Satoshi Yamashita , Shumpei Oohashi
IPC分类号： G06K9/00 , A61B6/03 , A61B6/00
CPC分类号： A61B6/032 , A61B6/405 , A61B6/482
摘要： An X-ray image generating unit alternately generates X-ray images each obtained by radiating X-rays having a higher level of energy and X-ray images each obtained by radiating X-rays having a lower level of energy. Further, every time an X-ray image has been generated by the X-ray image generating unit, a dual energy subtraction image generating unit generates a dual energy subtraction image by using the X-ray image that has just been generated and the X-ray image generated immediately preceding the X-ray image.

26. 发明申请

US20170135650A1 SYSTEM AND METHOD FOR LOW DOSE TOMOSYNTHESIS 有权
公开(公告)号：US20170135650A1
公开(公告)日：2017-05-18
申请号：US15342038
申请日：2016-11-02
申请人： Hologic, Inc.
发明人： Jay Stein , Andrew P. Smith , Zhenxue Jing , Loren Niklason
IPC分类号： A61B6/02 , A61B8/08 , A61B6/00
CPC分类号： A61B6/025 , A61B6/405 , A61B6/4417 , A61B6/502 , A61B6/5235 , A61B6/5247 , A61B6/542 , G01N23/046
摘要： A breast imaging system leverages the combined strengths of two-dimensional and three-dimensional imaging to provide a breast cancer screening with improved sensitivity, specificity and patient dosing. A tomosynthesis system supports the acquisition of three-dimensional images at a dosage lower than that used to acquire a two-dimensional image. The low-dose three-dimensional image may be used for mass detection, while the two-dimensional image may be used for calcification detection. Obtaining tomosynthesis data at low dose provides a number of advantages in addition to mass detection including the reduction in scan time and wear and tear on the x-ray tube. Such an arrangement provides a breast cancer screening system with high sensitivity and specificity and reduced patient dosing.

27. 发明申请

US20170086775A1 SYSTEMS AND METHODS FOR DUAL-ENERGY COMPUTED TOMOGRAPHY IMAGING 审中-公开
公开(公告)号：US20170086775A1
公开(公告)日：2017-03-30
申请号：US14871270
申请日：2015-09-30
申请人： General Electric Company
发明人： Priti Madhav , Uwe Wiedmann , Eric Biehr , Jiahua Fan , Jean-Francois Larroux , Vijay Subramanian
IPC分类号： A61B6/00 , A61B6/03
CPC分类号： A61B6/482 , A61B6/032 , A61B6/06 , A61B6/4035 , A61B6/405 , A61B6/488 , A61B6/542 , A61B6/544 , A61B6/545 , G06F19/00
摘要： An imaging system includes a computed tomography (CT) acquisition unit and a processing unit. The CT acquisition unit includes an X-ray source and a CT detector. The processing unit is configured to determine a voltage delivery configuration for the X-ray source based on at least one of a patient size, a clinical task, or scan parameters. The voltage delivery configuration includes at least one of a transition configuration or a voltage threshold. The transition configuration corresponds to a transition between a high and low voltage. Portions of acquired data acquired above the voltage threshold are grouped as high energy data and portions acquired below are grouped as low energy data. The processing unit is also configured to implement the voltage delivery configuration on the CT acquisition unit, and to control the CT acquisition unit to perform an imaging scan using the determined voltage delivery configuration.

28. 发明申请

US20170086765A1 UPRIGHT X-RAY BREAST IMAGING WITH A CT MODE, MULTIPLE TOMOSYNTHESIS MODES, AND A MAMMOGRAPHY MODE 审中-公开
公开(公告)号：US20170086765A1
公开(公告)日：2017-03-30
申请号：US15144425
申请日：2016-05-02
申请人： Hologic, Inc.
发明人： Andrew P. SMITH , Jay A. STEIN , Ken DEFREITAS , Ian SHAW , Zhenxue JING , Loren NIKLASON , Baorui REN , Christopher RUTH
IPC分类号： A61B6/00 , A61B6/04 , A61B6/02 , A61B6/03
CPC分类号： A61B6/502 , A61B6/025 , A61B6/027 , A61B6/032 , A61B6/04 , A61B6/0414 , A61B6/405 , A61B6/4441 , A61B6/4447 , A61B6/461 , A61B6/463 , A61B6/466 , A61B6/482 , A61B6/5235
摘要： A multi-mode system and method for imaging a patient's breast with x-rays in one or more of a CT mode, a narrow-angle tomosynthesis mode, a wide angle tomosynthesis mode, and a mammography mode, using essentially the same equipment, on one or more compressions or immobilizations of the breast.

29. 发明申请

US20160310087A1 SCANNING X-RAY IMAGING DEVICE WITH VARIABLE SHIELD PLATES AND METHOD FOR OPERATING SAME 审中-公开
标题翻译：具有可变屏蔽板的扫描X射线成像装置及其操作方法
公开(公告)号：US20160310087A1
公开(公告)日：2016-10-27
申请号：US15101957
申请日：2014-12-04
申请人： KONINKLIJKE PHILIPS N.V.
发明人： Per Mattias MYRMAN
IPC分类号： A61B6/06 , A61B6/00
CPC分类号： A61B6/06 , A61B6/4035 , A61B6/405 , A61B6/4266 , A61B6/502 , G21K1/043
摘要： A scanning X-ray imaging device (100) is proposed. The device may be specifically adapted for mammography applications. The device comprises an X-ray source (110), an X-ray line detector (150), a field limiter arrangement (170) and an observation volume (135). The field limiter arrangement (170) comprises at least two variable shield plates (174, 175) enclosing an opening (176) and a displacing mechanism (177). The shield plates may be displaced with respect to a centre axis of an X-ray beam (115) by means of the displacing mechanism such as to vary at least one of a cross-section and a location of the opening (176) between the field plates (174, 175) through which at least a part of the X-ray beam (115) is transmitted. The shield plates may be displaced independently from each other by means of the displacing mechanism (177). Such device (100) may be operated to perform a scanning motion such as to scan at least portions of the X-ray beam through a region of interest within the observation volume (135) and, at the same time, control the displacing mechanism (177) such that the opening (176) between the field plates (174, 175) is first successively opened to a larger cross-section and then successively closed again to a smaller cross-section during the scanning motion. Thereby, an X-ray dose level and an X-ray exposure time may be kept constant throughout an image acquisition procedure and an overall dose level may be minimized.
摘要翻译：提出了一种扫描X射线成像装置（100）。该装置可以专门适用于乳房X线照相应用。该装置包括X射线源（110），X射线检测器（150），场限制器装置（170）和观察容积（135）。场限制器装置（170）包括封闭开口（176）和移位机构（177）的至少两个可变屏蔽板（174,175）。屏蔽板可以通过移位机构相对于X射线束（115）的中心轴线移位，以便改变开口（176）的横截面和位置之间的至少一个 X射线束（115）的至少一部分透过的场板（174,175）。屏蔽板可以通过移位机构（177）彼此独立地移位。可以操作这种装置（100）以执行扫描运动，例如扫描X射线束的至少部分通过观察体积（135）内的感兴趣区域，并且同时控制移位机构（ 177），使得场板（174,175）之间的开口（176）首先连续地打开到更大的横截面，然后在扫描运动期间再次依次关闭到较小的横截面。因此，X射线剂量水平和X射线曝光时间可以在整个图像获取过程中保持恒定，并且总剂量水平可以最小化。

30. 发明申请

US20160270742A9 System and Method for Low Dose Tomosynthesis 有权
公开(公告)号：US20160270742A9
公开(公告)日：2016-09-22
申请号：US14057061
申请日：2013-10-18
申请人： Hologic, Inc.
发明人： Jay Stein , Andrew P. Smith , Zhenxue Jing , Loren Niklason
IPC分类号： A61B6/02
CPC分类号： A61B6/025 , A61B6/405 , A61B6/4417 , A61B6/502 , A61B6/5235 , A61B6/5247 , A61B6/542 , A61B8/0825 , G01N23/046
摘要： A breast imaging system leverages the combined strengths of two-dimensional and three-dimensional imaging to provide a breast cancer screening with improved sensitivity, specificity and patient dosing. A tomosynthesis system supports the acquisition of three-dimensional images at a dosage lower than that used to acquire a two-dimensional image. The low-dose three-dimensional image may be used for mass detection, while the two-dimensional image may be used for calcification detection. Obtaining tomosynthesis data at low dose provides a number of advantages in addition to mass detection including the reduction in scan time and wear and tear on the x-ray tube. Such an arrangement provides a breast cancer screening system with high sensitivity and specificity and reduced patient dosing.

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