Method and apparatus for volumetric cardiac computed tomography imaging
    1.
    发明授权
    Method and apparatus for volumetric cardiac computed tomography imaging 失效
    体积心脏计算机断层扫描成像的方法和装置

    公开(公告)号:US07289841B2

    公开(公告)日:2007-10-30

    申请号:US10280919

    申请日:2002-10-25

    IPC分类号: A61B6/00

    摘要: In a diagnostic cardiac imaging session of a patient's heart using a computed tomography imaging scanner (10) and a cardiac cycle monitor (42), a diagnostic objective (100) is received. Survey imaging (104) of the heart is performed to determine optimized imaging parameter values for the received diagnostic objective (100). Monitor imaging (108) of a limited portion of the heart is performed during influx of a contrast agent (22) using a low patient x-ray exposure condition to detect a trigger condition. Volume imaging (110) of the heart responsive to detection of the trigger condition is performed using the optimized imaging parameter values to obtain volumetric imaging data. Cardiac cycle data is recorded during at least a portion of the survey imaging (104), the monitor imaging (108), and the volume imaging (110). High resolution reconstructing (130) of at least some volumetric imaging data is performed to produce high resolution image representations (132).

    摘要翻译: 在使用计算机断层成像扫描仪(10)和心动周期监测器(42)的患者心脏的诊断心脏成像会话中,接收诊断目标(100)。 执行心脏的测量成像(104)以确定所接收的诊断目标(100)的优化成像参数值。 在使用低患者x射线曝光条件的造影剂(22)的流入期间进行心脏的有限部分的监视成像(108)以检测触发条件。 使用优化的成像参数值来执行响应于触发条件的检测的心脏的体积成像(110)以获得体积成像数据。 在测量成像(104),监视器成像(108)和体积成像(110)的至少一部分期间记录心脏周期数据。 执行至少一些体积成像数据的高分辨率重建(130)以产生高分辨率图像表示(132)。

    Multi-phase cardiac imager
    2.
    发明授权
    Multi-phase cardiac imager 有权
    多相心脏成像仪

    公开(公告)号:US06510337B1

    公开(公告)日:2003-01-21

    申请号:US09713752

    申请日:2000-11-15

    IPC分类号: A61B50452

    摘要: A method of cardiac gating for use in an imaging apparatus includes monitoring a patient's cardiac cycle, and determining a cardiac cycle time for the patient. A desired cardiac phase of interest is selected, and a delay from a reference point in the cardiac cycle is determined. The delay is a function of the selected cardiac phase and the cardiac cycle time. Finally, the selected cardiac phase is located in the cardiac cycle using the delay. This cardiac gating method compensates for non-uniform changes in the patient's cardiac cycle corresponding to a non-uniform distribution of cardiac phases in the patient's cardiac cycle.

    摘要翻译: 用于成像设备的心脏选通的方法包括监测患者的心脏周期,以及确定患者的心动周期时间。 选择感兴趣的期望的心脏相位,并且确定来自心动周期中的参考点的延迟。 延迟是所选择的心脏周期和心动周期时间的函数。 最后,选择的心脏相位使用延迟位于心动周期。 该心脏门控方法补偿对应于患者心动周期中心脏相位不均匀分布的患者心脏周期的不均匀变化。

    Needle biopsy system
    3.
    发明授权
    Needle biopsy system 有权
    针活检系统

    公开(公告)号:US06245028B1

    公开(公告)日:2001-06-12

    申请号:US09449322

    申请日:1999-11-24

    IPC分类号: A61B1000

    摘要: A needle biopsy system (10) includes a biopsy needle (210), and a needle support assembly (200). The needle support assembly (200) holds the biopsy needle (210) and manipulates the biopsy needle (210) in response to received control signals. A needle simulator (250) having an input device (252) generates the control signals in response to manipulation of the input device (252) by an operator. The operator, in turn, receives feedback from the needle simulator (250) in accordance with forces experienced by the biopsy needle (210). In a preferred embodiment, the feedback received by the operator includes tactile sensations experienced by the operator as the operator manipulates the input device (252). The tactile sensations mimic those the operator would have received had the operator directly manipulated the biopsy needle (210). Optionally, a curved needle guide (280) is employed to restrict the biopsy needle's progression longitudinally therethrough.

    摘要翻译: 针活检系统(10)包括活检针(210)和针支撑组件(200)。 针支撑组件(200)保持活检针(210)并响应于接收的控制信号操纵活检针(210)。 具有输入装置(252)的针模拟器(250)响应于操作者对输入装置(252)的操纵而产生控制信号。 操作者又根据活检针(210)所经受的力从针模具(250)接收反馈。 在优选实施例中,由操作者接收的反馈包括当操作者操纵输入装置(252)时由操作者经历的触感。 如果操作人员直接操纵活检针(210),则触觉感觉模拟操作者将接收的触感。 任选地,使用弯曲的针引导件(280)来纵向地限制活检针的进展。

    Vessel tracking and tree extraction method and apparatus
    4.
    发明授权
    Vessel tracking and tree extraction method and apparatus 有权
    船舶跟踪和树提取方法和装置

    公开(公告)号:US06728566B1

    公开(公告)日:2004-04-27

    申请号:US09990521

    申请日:2001-11-21

    IPC分类号: A61B505

    摘要: Computed tomography (CT) data (28) is collected for a plurality of slices by a CT scanner (10). At least a portion of the CT data is reconstructed (32) to form a volume image (34) defined by a plurality of two-dimensional image slices. At least one starting point is identified (72) within a blood vessel imaged in the three-dimensional image volume (34). The blood vessel is recursively tracked (70) to form a blood vessel representation (92).

    摘要翻译: 通过CT扫描仪(10)收集多个切片的计算机断层摄影(CT)数据(28)。 重建CT数据的至少一部分(32)以形成由多个二维图像切片定义的体积图像(34)。 在三维图像体积(34)中成像的血管内识别至少一个起始点(72)。 递归地跟踪血管(70)以形成血管表示(92)。

    Motion correction for perfusion measurements
    5.
    发明授权
    Motion correction for perfusion measurements 失效
    运动校正灌注测量

    公开(公告)号:US06496560B1

    公开(公告)日:2002-12-17

    申请号:US09990544

    申请日:2001-11-21

    IPC分类号: G01N2304

    摘要: A CT scanner (10) for obtaining a medical diagnostic image of a subject includes a stationary gantry (12), and a rotating gantry (14) rotatably supported on the stationary gantry (12) for rotation about the subject. A plurality of temporally displaced volume images are gathered, divided into slices, and stored in slice memories (541, 542, . . . 54n). A slice comparitor (58) compares each slice to a selected reference slice. The slices are transformed by a slice transformer (60) to align the slices thereby correcting for movement of the subject over the scan period.

    摘要翻译: 用于获得对象的医学诊断图像的CT扫描器(10)包括固定机架(12)和可旋转地支撑在固定机架(12)上以围绕被摄体旋转的旋转机架(14)。 多个时间位移的体积图像被收集,分成切片,并存储在切片存储器(541,542 ...,54n)中。 切片比较器(58)将每个切片与所选择的参考切片进行比较。 切片由切片变换器(60)转换以对准切片,从而校正扫描周期上的对象的移动。

    Measurements with CT perfusion
    6.
    发明授权
    Measurements with CT perfusion 失效
    CT灌注测量

    公开(公告)号:US06745066B1

    公开(公告)日:2004-06-01

    申请号:US09990352

    申请日:2001-11-21

    IPC分类号: A61B500

    摘要: A CT scanner (10) for obtaining a medical diagnostic image of a subject includes a stationary gantry (12), and a rotating gantry (14). The detected radiation is reconstructed and divided into sub-portions, which sub-portions are aligned by a registration processor (56). The registered images are stored in a high resolution memory (58) and a maximum artery enhancement value is calculated from the high resolution images. A resolution reducer (82) reduces the resolution of the high resolution images. Time-density curves are found for the voxels of the images, which time-density curves are truncated to eliminate unwanted data, and analyzed to determine characteristic values. A perfusion calculator (106) calculates perfusion by using the maximum artery enhancement value and the characteristic values. A diagnostician can view any one of a low resolution image, a high resolution image, and a perfusion image on a video monitor (112).

    摘要翻译: 用于获得对象的医学诊断图像的CT扫描器(10)包括固定台架(12)和旋转机架(14)。 检测到的辐射被重建并分成子部分,子部分由对准处理器(56)排列。 将注册的图像存储在高分辨率存储器(58)中,并且从高分辨率图像计算最大动脉增强值。 分辨率降低器(82)降低了高分辨率图像的分辨率。 针对图像的体素找到时间密度曲线,将时间密度曲线截断以消除不需要的数据,并进行分析以确定特征值。 灌注计算器(106)通过使用最大动脉增强值和特征值来计算灌注。 诊断人员可以在视频监视器(112)上观看低分辨率图像,高分辨率图像和灌注图像中的任何一个。

    Cardiac CT system
    7.
    发明授权
    Cardiac CT system 失效
    心脏CT系统

    公开(公告)号:US6154516A

    公开(公告)日:2000-11-28

    申请号:US157028

    申请日:1998-09-18

    IPC分类号: A61B6/00 A61B6/03 G01N23/083

    摘要: A cardiac gated spiral CT scanner (10) has a source of penetrating radiation (20) arranged for rotation about an examination region (14) having a central axis extending in a z direction. The source (20) emits a beam of radiation (22) that passes through the examination region (14) as the source (20) rotates. A patient support (30) holds a patient within the examination region (14) and translates the patient through the examination region (14) in the z direction while this source (20) is rotated such that the source (20) follows a helical path relative to the patient. A control processor (90) implements a patient-specific scan protocol in response to measured patient characteristics (for example, the patient's heart rate, the patient's breath hold time, and/or the range of coverage in the z direction based on the patient's anatomy) and scanner characteristics (for example, the number of detector rings, and/or the scan rate). Radiation detectors (40) are arranged to receive radiation from the source (20) after it has traversed the examination region (14). An ECG monitor (80) acquires ECG data from the patient. The ECG data is used to correlate phases of the patient's heart with data collected by the radiation detectors (40). An image reconstruction processor (60) reconstructs image representations of the patient based on data received from the radiation detectors (40) and ECG monitor (80). A human viewable display (70) selectively displays the image representations for assessing cardiac function.

    摘要翻译: 心脏门控螺旋CT扫描器(10)具有穿透辐射源(20),其布置成围绕具有在z方向上延伸的中心轴线的检查区域(14)旋转。 当源(20)旋转时,源(20)发射穿过检查区域(14)的辐射束(22)。 病人支撑件(30)将患者保持在检查区域(14)内,并且在该源(20)旋转时使患者通过检查区域(z)在z方向上平移,使得源(20)遵循螺旋路径 相对于患者。 控制处理器(90)响应于测量的患者特征(例如,患者的心率,患者的呼吸保持时间,和/或基于患者的解剖结构在z方向上的覆盖范围)实施患者特异性扫描方案 )和扫描仪特性(例如,检测器环的数量和/或扫描速率)。 辐射检测器(40)被布置成在源(20)穿过检查区域(14)之后接收来自源(20)的辐射。 ECG监测器(80)从患者获取ECG数据。 ECG数据用于将患者心脏的相位与辐射检测器(40)收集的数据相关联。 图像重建处理器(60)基于从辐射检测器(40)和ECG监视器(80)接收的数据来重建患者的图像表示。 人类可视显示器(70)选择性地显示用于评估心脏功能的图像表示。

    Graphical apparatus and method for tracking image volume review
    9.
    发明申请
    Graphical apparatus and method for tracking image volume review 审中-公开
    用于跟踪图像体积检查的图形设备和方法

    公开(公告)号:US20050184988A1

    公开(公告)日:2005-08-25

    申请号:US10510861

    申请日:2003-04-11

    摘要: An apparatus and graphical method for tracking image volume review is provided. An image volume data set is stored in a memory and selected portions of the image volume data set is displayed on a human readable display. A mapping of the displayed portion of the image volume data set is performed relative to a volume completion data set. The volume completion data set with the first portion thereof identified according to the mapping is colorized using a shading function to visually differentiate first portions of the volume completion data set reviewed by a radiologist from remaining portions of the volume completion data set. In that way, a complete review of the image volume can be conducted without missing portions thereof and without redundancy.

    摘要翻译: 提供了一种用于跟踪图像体积检查的装置和图形方法。 图像体积数据集存储在存储器中,并且图像体积数据集的选定部分显示在人类可读显示器上。 相对于卷完成数据集执行图像卷数据集的显示部分的映射。 根据映射识别的其第一部分的卷完成数据集使用着色功能进行着色,以将由放射科医师审查的体积完成数据集的第一部分与体积完成数据集的剩余部分视觉上区分开。 以这种方式,可以进行对图像体积的完整评估,而不会丢失其部分并且没有冗余。

    Method and apparatus for semi-automatic aneurysm measurement and stent planning using volume image data
    10.
    发明授权
    Method and apparatus for semi-automatic aneurysm measurement and stent planning using volume image data 有权
    用于半自动动脉瘤测量和使用体积图像数据的支架计划的方法和装置

    公开(公告)号:US06782284B1

    公开(公告)日:2004-08-24

    申请号:US09990010

    申请日:2001-11-21

    IPC分类号: A61B505

    摘要: An apparatus for measuring parameters preparatory to a stent replacement of an aneurytic blood vessel in a patient (26) includes a computed tomography (CT) scanner (10) that acquires image data (28) corresponding to multiple two-dimensional image slices. A reconstruction processor (32) reconstructs a three-dimensional image representation (34) from the image data (28). A tracking processor (40) produces a tracked vessel (92) including at least a centerline (80) and selected vessel boundaries (86). A user interface (44) displays a rendering (242) of the image representation to an associated user (42), measures selected vascular parameters corresponding to the stent parameters (276), and graphically superimposes the measured parameters on the rendering of the image representation (270, 272).

    摘要翻译: 一种用于测量患者(26)中的支气管血管的支架置换的参数的装置,包括计算机断层摄影(CT)扫描仪(10),其获取对应于多个二维图像切片的图像数据(28)。 重建处理器(32)从图像数据(28)重建三维图像表示(34)。 跟踪处理器(40)产生包括至少中心线(80)和选择的血管边界(86)的跟踪血管(92)。 用户界面(44)将图像表示的渲染(242)显示给相关联的用户(42),测量对应于支架参数(276)的所选择的血管参数,并且将所测量的参数以图形方式叠加在图像表示 (270,272)。