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1. 发明授权

US06990172B2 Method and apparatus to determine tube current modulation profile for radiographic imaging 有权
标题翻译：确定射线照相成像的管电流调制曲线的方法和装置
公开(公告)号：US06990172B2
公开(公告)日：2006-01-24
申请号：US10782485
申请日：2004-02-19
申请人： Thomas L. Toth , Steven J. Woloschek , Jonathan R. Schmidt
发明人： Thomas L. Toth , Steven J. Woloschek , Jonathan R. Schmidt
IPC分类号： H05G1/34
CPC分类号： A61B6/032 , A61B6/4085 , A61B6/488 , A61B6/542 , A61B6/544 , A61B6/583 , G06F19/00
摘要： A method and apparatus is disclosed to acquire scout scan data of a subject and analyzed to determine a peak-to-peak modulation amplitude of a normalized waveform indicative of subject size and shape. The scout scan data provides a representation of patient size and shape that is associated with an ideal tube current modulation waveform or profile. The ideal tube current modulation profile may then be sampled or approximated at various points to determine a tube current modulation profile for implementation to acquire CT data with reduced dose but without sacrificing image quality.
摘要翻译：公开了一种获取被摄体的侦察扫描数据并进行分析的方法和装置，以确定表示被摄体大小和形状的归一化波形的峰 - 峰调制幅度。侦察扫描数据提供与理想的管电流调制波形或轮廓相关联的患者大小和形状的表示。然后可以在各个点对理想的管电流调制曲线进行采样或近似，以确定管电流调制曲线，用于实现以减小剂量而不牺牲图像质量来获取CT数据。

2. 发明授权

US06836529B2 Method and apparatus of CT imaging with voltage modulation 有权
标题翻译：电压调制CT成像方法及装置
公开(公告)号：US06836529B2
公开(公告)日：2004-12-28
申请号：US09683781
申请日：2002-02-13
申请人： Jianying Li , Steven J. Woloschek , Thomas L. Toth , Jonathan R. Schmidt
发明人： Jianying Li , Steven J. Woloschek , Thomas L. Toth , Jonathan R. Schmidt
IPC分类号： G01N2300
CPC分类号： A61B6/541 , A61B6/032
摘要： A system and method of diagnostic imaging with reduced x-ray exposure to the scan subject during scanning includes acquiring a set of cardiac signals or other motion (cardiac mechanical motion or respiratory motion) related signals and determining and imaging profile therefrom. Pursuant to the imaging profile, voltage applied to an x-ray source is modulated to provide an energizing voltage during primary data acquisition stages and a reduced voltage during secondary or non-data acquisition stages. Voltage modulation repeats until sufficient data for image reconstruction has been acquired.
摘要翻译：在扫描期间减少对扫描对象的X射线照射的诊断成像的系统和方法包括获取一组心脏信号或其他运动（心脏机械运动或呼吸运动）相关信号，并从中确定和成像轮廓。根据成像轮廓，施加到X射线源的电压被调制以在主数据采集阶段提供通电电压，并且在次级或非数据采集阶段期间提供降低的电压。直到获得用于图像重建的足够数据为止，才重复进行电压调制。

3. 发明授权

US06327331B1 Method and apparatus for analyzing CT z-axis beam positioning 失效
标题翻译： CT z轴光束定位分析方法及装置
公开(公告)号：US06327331B1
公开(公告)日：2001-12-04
申请号：US09473346
申请日：1999-12-28
申请人： Thomas L. Toth , Steven J. Woloschek
发明人： Thomas L. Toth , Steven J. Woloschek
IPC分类号： G01S2300
CPC分类号： A61B6/587 , A61B6/08 , Y10S378/901
摘要： In one embodiment of the present invention, a method is provided for analyzing performance of tracking control loop in a CT imaging system configured to position an x-ray beam using the tracking control loop. The method includes the steps of collecting control loop data over a plurality of views during scanning and of evaluating control loop data relative to the corresponding views to measure at least one imaging system characteristic. This method provides the imaging system user with data that facilitates insight into possible causes for imaging artifacts. In another embodiment, a CT imaging system is provided including a tracking control loop. The CT imaging system is configured to position an x-ray beam using the tracking control loop, collect control loop data over a plurality of views during scanning and evaluate control loop data relative to the corresponding views to measure at least one imaging system characteristic.
摘要翻译：在本发明的一个实施例中，提供了一种用于分析CT成像系统中的跟踪控制环的性能的方法，该CT成像系统被配置为使用跟踪控制环来定位X射线束。该方法包括以下步骤：在扫描期间在多个视图中收集控制环路数据，并且相对于对应视图评估控制环路数据以测量至少一个成像系统特征。该方法为成像系统用户提供有助于洞察成像伪像的可能原因的数据。在另一个实施例中，提供了包括跟踪控制回路的CT成像系统。 CT成像系统被配置为使用跟踪控制环来定位X射线束，在扫描期间在多个视图上收集控制环路数据，并且相对于对应视图评估控制环路数据以测量至少一个成像系统特性。

4. 发明授权

US06385279B1 Methods and apparatus for positioning a CT imaging x-ray beam 有权
标题翻译：用于定位CT成像X射线束的方法和装置
公开(公告)号：US06385279B1
公开(公告)日：2002-05-07
申请号：US09384169
申请日：1999-08-27
申请人： Thomas L. Toth , Steven J. Woloschek , Jerome D. Rabe
发明人： Thomas L. Toth , Steven J. Woloschek , Jerome D. Rabe
IPC分类号： A61B600
CPC分类号： A61B6/583 , A61B6/032 , A61B6/4085
摘要： In one embodiment, the present invention is a method for positioning an x-ray beam on a multi-slice detector array of an imaging system in which the detector array has rows of detector elements and is configured to detect x-rays in slices along a z-axis. The method includes steps of comparing data signals representative of x-ray intensity received from different rows of detector elements and positioning the x-ray beam in accordance with a result of the comparison.
摘要翻译：在一个实施例中，本发明是一种用于将X射线束定位在成像系统的多切片检测器阵列上的方法，其中检测器阵列具有行的检测器元件，并且被配置为沿着检测器元件的切片检测x射线 z轴。该方法包括比较表示从不同行的检测器元件接收的x射线强度的数据信号和根据比较结果来定位x射线束的步骤。

5. 发明授权

US06470208B1 Method and apparatus for controlling x-ray exposure during gated cardiac scanning 有权
标题翻译：门控心脏扫描期间控制x射线暴露的方法和装置
公开(公告)号：US06470208B1
公开(公告)日：2002-10-22
申请号：US09474962
申请日：1999-12-30
申请人： Mark E. Woodford , Kishore C. Acharya , Steven J. Woloschek
发明人： Mark E. Woodford , Kishore C. Acharya , Steven J. Woloschek
IPC分类号： A61B500
CPC分类号： A61B6/541
摘要： A method is described for controlling x-ray exposure during gated cardiac scanning, including the steps of detecting a first cardiac signal; starting scanning after a pre-selected wait time after detecting the first cardiac signal; and stopping the scanning after a first to occur of passage of a pre-selected data collection time and detection of a second cardiac signal.
摘要翻译：描述了一种用于控制门控心脏扫描期间的X射线曝光的方法，包括检测第一心脏信号的步骤; 在检测到第一心脏信号之后，在预先选择的等待时间之后开始扫描; 以及在预先选择的数据收集时间的通过的第一次发生和第二心脏信号的检测之后停止扫描。

6. 发明授权

US08548118B2 Apparatus and method for spectral projection imaging with fast KV switching 有权
标题翻译：用于快速KV切换的光谱投影成像装置和方法
公开(公告)号：US08548118B2
公开(公告)日：2013-10-01
申请号：US12642945
申请日：2009-12-21
申请人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
发明人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
IPC分类号： G01N23/00
CPC分类号： A61B6/482 , A61B6/4021 , A61B6/4266 , A61B6/488 , G01T1/2985
摘要： A CT system includes a gantry, an x-ray source configured to project x-rays toward an object, an x-ray detector positioned to receive x-rays from the x-ray source that pass through the object, a generator configured to energize the x-ray source to a first voltage and to a second voltage that is distinct from the first voltage, and a controller configured to cause the gantry to position the source and generator at a circumferential position during an imaging session, pass the object through the opening during the imaging session, cause the generator to energize the x-ray source to the first voltage and to the second voltage, acquire imaging data while the generator energizes the x-ray source to the first voltage and to the second voltage while the rotatable gantry is at the circumferential position, and generate an image using the imaging data.
摘要翻译：一个CT系统包括一个配置成将x射线投射到物体的台架，x射线源，x射线探测器，其被定位成从X射线源接收穿过物体的x射线， x射线源到第一电压和不同于第一电压的第二电压;以及控制器，其被配置为使得台架在成像会话期间将源和发生器定位在圆周位置，使物体通过在成像会话期间打开，使得发生器将x射线源激励到第一电压和第二电压，获取成像数据，同时发生器将X射线源激励到第一电压和第二电压，同时可旋转龙门架处于圆周位置，并使用成像数据生成图像。

7. 发明授权

US06298117B1 Variable aperture z-axis tracking collimator for a computed tomograph system 有权
标题翻译：用于计算机断层摄影系统的可变孔径z轴跟踪准直仪
公开(公告)号：US06298117B1
公开(公告)日：2001-10-02
申请号：US09693367
申请日：2000-10-20
申请人： Willi W. Hampel , Russell W. Hum , Carmine F. Vara, Jr. , Steven J. Woloschek
发明人： Willi W. Hampel , Russell W. Hum , Carmine F. Vara, Jr. , Steven J. Woloschek
IPC分类号： A61B603
CPC分类号： A61B6/5205 , A61B6/032 , A61B6/06 , A61B6/4021 , A61B6/4085 , A61B6/542
摘要： Methods and apparatus for dose reduction in a computed tomography (CT) system are described. In one embodiment, the CT system includes a pre-patient collimator and a configurable multislice detector array. The pre-patient collimator includes a plurality of eccentric cams and a filtration device for altering the x-ray beam radiated from a x-ray source. The eccentric cams are positioned to collimate the x-ray beam and may be independently positioned to provide z-axis correction of the x-ray beam. The filtration device includes a plurality of filters for altering the x-ray beam. In operation, an operator selects the type of test and the quantity and thickness of the slices. After altering the detector and collimator configuration, slice data for each slice is gathered.
摘要翻译：描述了计算机断层摄影（CT）系统中剂量减少的方法和装置。在一个实施例中，CT系统包括患者前准直仪和可配置多层检测器阵列。患者前准直仪包括多个偏心凸轮和用于改变从X射线源辐射的X射线束的过滤装置。偏心凸轮被定位成准直x射线束，并且可以独立地定位以提供x射线束的z轴校正。过滤装置包括用于改变X射线束的多个过滤器。在操作中，操作者选择测试的类型以及切片的数量和厚度。在更改检测器和准直器配置后，收集每个切片的切片数据。

8. 发明申请

US20110150175A1 APPARATUS AND METHOD FOR SPECTRAL PROJECTION IMAGING WITH FAST KV SWITCHING 有权
标题翻译：用快速KV切换进行光谱投影成像的装置和方法
公开(公告)号：US20110150175A1
公开(公告)日：2011-06-23
申请号：US12642945
申请日：2009-12-21
申请人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
发明人： Jiang Hsieh , Naveen Chandra , Steven J. Woloschek , Robert F. Senzig
IPC分类号： H05G1/60 , G06K9/00
CPC分类号： A61B6/482 , A61B6/4021 , A61B6/4266 , A61B6/488 , G01T1/2985
摘要： A CT system includes a gantry, an x-ray source configured to project x-rays toward an object, an x-ray detector positioned to receive x-rays from the x-ray source that pass through the object, a generator configured to energize the x-ray source to a first voltage and to a second voltage that is distinct from the first voltage, and a controller configured to cause the gantry to position the source and generator at a circumferential position during an imaging session, pass the object through the opening during the imaging session, cause the generator to energize the x-ray source to the first voltage and to the second voltage, acquire imaging data while the generator energizes the x-ray source to the first voltage and to the second voltage while the rotatable gantry is at the circumferential position, and generate an image using the imaging data.
摘要翻译：一个CT系统包括一个配置成将x射线投射到物体的台架，x射线源，x射线探测器，其被定位成从X射线源接收穿过物体的x射线， x射线源到第一电压和不同于第一电压的第二电压;以及控制器，其被配置为使得台架在成像会话期间将源和发生器定位在圆周位置，使物体通过在成像会话期间打开，使得发生器将x射线源激励到第一电压和第二电压，获取成像数据，同时发生器将X射线源激励到第一电压和第二电压，同时可旋转龙门架处于圆周位置，并使用成像数据生成图像。

9. 发明授权

US07477928B2 Method and system for associating an EKG waveform with a CT image 有权
标题翻译：将EKG波形与CT图像相关联的方法和系统
公开(公告)号：US07477928B2
公开(公告)日：2009-01-13
申请号：US10063840
申请日：2002-05-17
申请人： Kishore C. Acharya , Darin R. Okerlund , Steven J. Woloschek , Mark E. Woodford
发明人： Kishore C. Acharya , Darin R. Okerlund , Steven J. Woloschek , Mark E. Woodford
IPC分类号： A61B5/05
CPC分类号： A61B6/541
摘要： A method for associating EKG waveform data with computed tomography image data using a data synchronization scheme including generating the EKG waveform data using an electrocardiogram device, operating a computed tomography imaging system so as to create the computed tomography image data, communicating an exposure marker-in signal to the electrocardiogram device such that the exposure marker-in signal is associated with the EKG waveform data and processing the computed tomography image data, the EKG waveform data and the exposure marker-in signal, so as to correlate the EKG waveform data with the computed tomography image data. Also claimed is a medium encoded with a machine-readable computer program code for associating EKG waveform data with image data generated by an imaging system using a data synchronization scheme, the medium including instructions for causing controller to implement the aforementioned method.
摘要翻译：一种使用包括使用心电图设备生成EKG波形数据的数据同步方案将EKG波形数据与计算机断层摄影图像数据相关联的方法，操作计算机断层摄影成像系统，以便产生计算机断层摄影图像数据，信号到心电图设备，使得曝光标记输入信号与EKG波形数据相关联并处理计算机断层摄影图像数据，EKG波形数据和曝光标记输入信号，以便将EKG波形数据与计算机断层摄影图像数据。还要求保护的是具有用于将EKG波形数据与使用数据同步方案的成像系统生成的图像数据相关联的机器可读计算机程序代码的介质，所述介质包括用于使控制器实现上述方法的指令。

10. 发明授权

US06442228B1 Data acquisition modifications for improved reconstruction with conventional CT 有权
标题翻译：数据采集修改用于改进常规CT的重建
公开(公告)号：US06442228B1
公开(公告)日：2002-08-27
申请号：US09553192
申请日：2000-04-20
申请人： Steven J. Woloschek , Kenneth G. Dunahee
发明人： Steven J. Woloschek , Kenneth G. Dunahee
IPC分类号： A61B603
CPC分类号： A61B6/032 , A61B6/027 , A61B6/541
摘要： One embodiment of the present invention is a method for imaging an object with a computed tomographic (CT) imaging system that includes steps of scanning an object with a beam of radiation from a CT imaging system to produce a view stream including attenuation data for the object being scanned; sensing one or more dynamic parameters relating to at least one of the object being scanned and the CT imaging system; and integrating information relating to the one or more sensed dynamic parameters into the view stream. This embodiment integrates information necessary for compensating reconstructed images directly into the view stream, thereby making the necessary information more conveniently available for such compensation.
摘要翻译：本发明的一个实施例是一种用计算机断层摄影（CT）成像系统对物体进行成像的方法，该系统包括以下步骤：用来自CT成像系统的辐射束扫描对象，以产生包括对象的衰减数据的观看流被扫描; 感测与被扫描物体和CT成像系统中的至少一个有关的一个或多个动态参数; 将与一个或多个感测到的动态参数有关的信息集成到视图流中。本实施例将对重建图像进行补偿所需的信息直接集成到视图流中，从而使必要的信息更方便地用于这种补偿。

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