Use of transmission pre-scan of an object to be imaged to determine duration of transmission scan
    11.
    发明授权
    Use of transmission pre-scan of an object to be imaged to determine duration of transmission scan 失效
    使用要成像对象的传输预扫描来确定传输扫描的持续时间

    公开(公告)号:US06259097B1

    公开(公告)日:2001-07-10

    申请号:US09322295

    申请日:1999-05-28

    IPC分类号: G01T120

    摘要: A transmission pre-scan of a patient is used in a nuclear medicine imaging system to determine the duration of a subsequent transmission scan of the patient. The transmission scan is for acquiring an attenuation map of the patient to correct emission data of the patient for non-uniform attenuation. As a result, the patient's exposure to radiation during the transmission scan is not excessive, yet transmission image quality is maintained. A radiation transmission source and a radiation detector are operated to perform the transmission pre-scan of the object, during which the transmission source remains in a fixed position. Downscatter correction is applied to correct the transmission pre-scan data for emission contamination. Count values from the pre-scan data are integrated axially. A water-equivalent cross-section value of the patient is then determined based on data acquired from the transmission pre-scan, and the duration of the transmission scan is computed based on the water-equivalent cross-section value.

    摘要翻译: 在核医学成像系统中使用患者的透射预扫描来确定患者的后续透射扫描的持续时间。 透射扫描用于获取患者的衰减图,以校正患者的不均匀衰减的发射数据。 结果,患者在透射扫描期间的辐射暴露并不过分,而是保持透射图像质量。 操作辐射透射源和辐射检测器以执行物体的透射预扫描,在此期间透射源保持在固定位置。 应用向下散射校正来校正发射预扫描数据以发射污染。 来自预扫描数据的计数值被轴向积分。 然后,基于从发送预扫描获取的数据来确定患者的水当量横截面值,并且基于水当量横截面值计算发送扫描的持续时间。

    GATED CT WITH IRREGULAR SAMPLING FOR SLOW CT ACQUISITION
    12.
    发明申请
    GATED CT WITH IRREGULAR SAMPLING FOR SLOW CT ACQUISITION 有权
    采用CT扫描进行慢速CT采集的非正常采样

    公开(公告)号:US20090225933A1

    公开(公告)日:2009-09-10

    申请号:US12375426

    申请日:2007-07-18

    IPC分类号: A61B6/00

    摘要: A physiological parameter monitor (44) monitors a cyclic physiological parameter and generates a cyclic parameter phase indicative signal. A radiation system (8) is disposed adjacent an examination region (18, 28) to generate transmission radiation data and emission radiation data. First and second sorting devices (48, 74) sort corresponding transmission and emission radiation data into transmission radiation data sets (50) and emission radiation data sets (78) corresponding to each of a plurality of the cyclic parameter phases. A data processor (60) reconstructs attenuation maps (62) from the transmission data for each of the plurality of cyclic parameter phases. An image processor (80) corrects the emission radiation data of each cyclic parameter phase with the attenuation map (62) of the same cyclic parameter phase and reconstructs the attenuation corrected emission data sets into an image representation for each cyclic parameter phase.

    摘要翻译: 生理参数监视器(44)监视循环生理参数并产生循环参数相位指示信号。 放射系统(8)邻近检查区域(18,28)设置,以产生透射辐射数据和发射辐射数据。 第一和第二分类装置(48,74)将相应的发射和发射辐射数据分类为与多个循环参数相位中的每一个相对应的发射辐射数据组(50)和发射辐射数据组(78)。 数据处理器(60)根据用于多个循环参数相位中的每一个的传输数据重建衰减图(62)。 图像处理器(80)利用相同循环参数相位的衰减图(62)校正每个循环参数相位的发射辐射数据,并将衰减校正的发射数据集重建为每个循环参数相位的图像表示。

    Physiological model based non-rigid image registration
    13.
    发明授权
    Physiological model based non-rigid image registration 有权
    基于生理模型的非刚性图像配准

    公开(公告)号:US07117026B2

    公开(公告)日:2006-10-03

    申请号:US10167621

    申请日:2002-06-12

    IPC分类号: A61B5/05

    摘要: A method for non-rigid registration and fusion of images with physiological modeled organ motions resulting from respiratory motion and cardiac motion that are mathematically modeled with physiological constraints. A method of combining images comprises the steps of obtaining a first image dataset (24) of a region of interest of a subject and obtaining a second image dataset (34) of the region of interest of the subject. Next, a general model of physiological motion for the region of interest is provided (142). The general model of physiological motion is adapted with data derived from the first image data set (140) to provide a subject specific physiological model (154). The subject specific physiological model is applied (172) to the second image dataset (150) to provide a combined image (122).

    摘要翻译: 一种用于非正常对准和融合图像与由呼吸运动和心脏运动产生的生理建模器官运动的方法,其以数学模型用生理约束来建模。 一种组合图像的方法包括以下步骤:获得受试者感兴趣区域的第一图像数据集(24),并获得对象区域的第二图像数据集(34)。 接下来,提供感兴趣区域的生理运动的一般模型(142)。 生理运动的一般模型适应于从第一图像数据集(140)导出的数据,以提供受试者特异性生理模型(154)。 将主题特定生理模型(172)应用于第二图像数据集(150)以提供组合图像(122)。

    Gated CT with irregular sampling for slow CT acquisition
    14.
    发明授权
    Gated CT with irregular sampling for slow CT acquisition 有权
    门脉CT采用不规则采样进行慢CT采集

    公开(公告)号:US07907698B2

    公开(公告)日:2011-03-15

    申请号:US12375426

    申请日:2007-07-18

    IPC分类号: G01N23/083 H05G1/62

    摘要: A physiological parameter monitor (44) monitors a cyclic physiological parameter and generates a cyclic parameter phase indicative signal. A radiation system (8) is disposed adjacent an examination region (18, 28) to generate transmission radiation data and emission radiation data. First and second sorting devices (48, 74) sort corresponding transmission and emission radiation data into transmission radiation data sets (50) and emission radiation data sets (78) corresponding to each of a plurality of the cyclic parameter phases. A data processor (60) reconstructs attenuation maps (62) from the transmission data for each of the plurality of cyclic parameter phases. An image processor (80) corrects the emission radiation data of each cyclic parameter phase with the attenuation map (62) of the same cyclic parameter phase and reconstructs the attenuation corrected emission data sets into an image representation for each cyclic parameter phase.

    摘要翻译: 生理参数监视器(44)监视循环生理参数并产生循环参数相位指示信号。 放射系统(8)邻近检查区域(18,28)设置,以产生透射辐射数据和发射辐射数据。 第一和第二分类装置(48,74)将相应的发射和发射辐射数据分类为与多个循环参数相位中的每一个相对应的发射辐射数据组(50)和发射辐射数据组(78)。 数据处理器(60)根据用于多个循环参数相位中的每一个的传输数据重建衰减图(62)。 图像处理器(80)利用相同循环参数相位的衰减图(62)校正每个循环参数相位的发射辐射数据,并将衰减校正的发射数据集重建为每个循环参数相位的图像表示。

    Iterative reconstruction of multiple-peak isotope images
    15.
    发明授权
    Iterative reconstruction of multiple-peak isotope images 有权
    多峰同位素图像的迭代重建

    公开(公告)号:US07865005B2

    公开(公告)日:2011-01-04

    申请号:US11627087

    申请日:2007-01-25

    IPC分类号: G06K9/00

    摘要: In an imaging method, estimated data is iteratively projected and backprojected. The iterative projecting and backprojecting includes projecting or backprojecting the estimated data along parallel paths each employing energy-dependent parameters appropriate for a different energy. During each iteration, the estimated data is adjusted based on comparison of the estimated data with measured data.

    摘要翻译: 在成像方法中,估计数据被迭代地投影并反向投影。 迭代投影和反向投影包括沿着并行路径投影或反投影估计数据,每个并行路径采用适用于不同能量的能量相关参数。 在每次迭代期间,基于估计数据与测量数据的比较来调整估计数据。

    Restoration of the nuclear medicine 2D planar image by iterative constrained deconvolution
    16.
    发明授权
    Restoration of the nuclear medicine 2D planar image by iterative constrained deconvolution 有权
    通过迭代约束去卷积恢复核医学2D平面图像

    公开(公告)号:US07840052B2

    公开(公告)日:2010-11-23

    申请号:US11719420

    申请日:2005-11-04

    IPC分类号: G06K9/40 G06T5/20

    摘要: A medical imaging system (10) includes at least one radiation detection head (16) disposed adjacent a subject receiving aperture (18) to detect radiation from a subject. The detected radiation is reconstructed into at least one initial 2D projection image (μ). Resolution in each initial 2D image (μ) is restored by using the extended iterative constrained deconvolution algorithm by incorporating different estimates of the system response function which estimates correspond to different distances between the detection head and the origins of the detected radiation. Measured response functions are used to restore a series of images. The optimal image is determined by automatic searching with the figure of merit, by user's observation, or by using blind deconvolution for a concurrent estimating of the system response function and updating the original image.

    摘要翻译: 医疗成像系统(10)包括邻近被检体接收孔(18)设置的至少一个放射线检测头(16),以检测来自受试者的辐射。 将检测到的辐射重建成至少一个初始2D投影图像(μ)。 通过使用扩展迭代约束去卷积算法,通过并入系统响应函数的不同估计值来估计每个初始2D图像(μ)中的分辨率,其估计对应于检测头与检测到的辐射源之间的不同距离。 测量的响应功能用于恢复一系列图像。 通过用户的观察自动搜索,通过使用盲解卷积来同时估计系统响应函数和更新原始图像来确定最佳图像。

    ITERATIVE RECONSTRUCTION WITH ENHANCED NOISE CONTROL FILTERING
    17.
    发明申请
    ITERATIVE RECONSTRUCTION WITH ENHANCED NOISE CONTROL FILTERING 有权
    具有增强噪声控制滤波的迭代重建

    公开(公告)号:US20090232375A1

    公开(公告)日:2009-09-17

    申请号:US12067185

    申请日:2006-08-21

    IPC分类号: G06K9/00

    摘要: An imaging system (10) comprises at least one radiation detector (20) disposed adjacent a subject receiving aperture (18) to detect radiation from a subject, receive the radiation and generate measured data. An image processor (38) iteratively reconstructs the detected radiation into image representations, in each reconstruction iteration the image processor (38) applies noise reduction algorithms to at least a difference between the measured data and a portion of a previous iteration image representation.

    摘要翻译: 成像系统(10)包括邻近对象接收孔(18)设置的至少一个辐射检测器(20),以检测来自对象的辐射,接收辐射并产生测量数据。 图像处理器(38)将检测到的辐射重建成图像表示,在每个重建迭代中,图像处理器(38)将噪声降低算法应用于至少测量数据与先前迭代图像表示的一部分之间的差异。

    Gamma camera error correction using multiple point sources

    公开(公告)号:US06664542B2

    公开(公告)日:2003-12-16

    申请号:US10026381

    申请日:2001-12-20

    IPC分类号: G01T1166

    CPC分类号: G01T1/1648

    摘要: A gamma camera system and method are described which use multiple point sources to detect inaccuracies in detector translational and rotational alignment. In practice of the method of the preferred embodiment, three capillary tubes, each containing a drop of an isotope, are located in different planes and locations with respect to the axis of rotation of the detectors. A SPECT acquisition is performed and the point source projection data is processed to calculate the point source coordinates, from which center-of-rotation correction factors may be calculated. These correction factors are applied by mechanical and software adjustments to the gantry and acquisition systems of the camera to correct for both translational and rotational inaccuracies.

    DUAL MODALITY IMAGING INCLUDING QUALITY METRICS
    19.
    发明申请
    DUAL MODALITY IMAGING INCLUDING QUALITY METRICS 有权
    双重模态成像,包括质量度量

    公开(公告)号:US20130142411A1

    公开(公告)日:2013-06-06

    申请号:US13817150

    申请日:2011-08-17

    IPC分类号: G06T11/00

    摘要: An anatomical image data set and an emission image data set are acquired for a subject. An attenuation map is generated from the anatomical image data set. The emission image data set is reconstructed to generate an emission image. The reconstructing includes correcting for attenuation of emission radiation in the subject using the attenuation map. A value is calculated for a quality assurance (QA) metric quantifying alignment of the attenuation map with the emission image. The emission image is displayed or printed together with the calculated quality assurance metric. In some embodiments, prior to the reconstructing the attenuation map is registered with the emission image data set by performing a global rigid registration followed by a local non-rigid registration of a region of interest.

    摘要翻译: 获取对象的解剖图像数据集和发射图像数据集。 从解剖图像数据集生成衰减图。 重建发射图像数据集以产生发射图像。 重建包括使用衰减图校正受试者中发射辐射的衰减。 针对质量保证(QA)量度计算衰减图与发射图像的对准的值。 排放图像与计算的质量保证度量一起显示或打印。 在一些实施例中,在重建之前,通过执行全局刚性配准,随后是感兴趣区域的局部非刚性配准,将衰减图与发射图像数据集进行配准。

    Dual modality imaging including quality metrics
    20.
    发明授权
    Dual modality imaging including quality metrics 有权
    双重模态成像包括质量指标

    公开(公告)号:US08977027B2

    公开(公告)日:2015-03-10

    申请号:US13817150

    申请日:2011-08-17

    IPC分类号: G06K9/00 G06T11/00 G06T7/00

    摘要: An anatomical image data set and an emission image data set are acquired for a subject. An attenuation map is generated from the anatomical image data set. The emission image data set is reconstructed to generate an emission image. The reconstructing includes correcting for attenuation of emission radiation in the subject using the attenuation map. A value is calculated for a quality assurance (QA) metric quantifying alignment of the attenuation map with the emission image. The emission image is displayed or printed together with the calculated quality assurance metric. In some embodiments, prior to the reconstructing the attenuation map is registered with the emission image data set by performing a global rigid registration followed by a local non-rigid registration of a region of interest.

    摘要翻译: 获取对象的解剖图像数据集和发射图像数据集。 从解剖图像数据集生成衰减图。 重建发射图像数据集以产生发射图像。 重建包括使用衰减图校正受试者中发射辐射的衰减。 针对质量保证(QA)量度计算衰减图与发射图像的对准的值。 排放图像与计算的质量保证度量一起显示或打印。 在一些实施例中,在重建之前,通过执行全局刚性配准,随后是感兴趣区域的局部非刚性配准,将衰减图与发射图像数据集进行配准。