MR SEGMENTATION USING NUCLEAR EMISSION DATA IN HYBRID NUCLEAR IMAGING/MR
    11.
    发明申请
    MR SEGMENTATION USING NUCLEAR EMISSION DATA IN HYBRID NUCLEAR IMAGING/MR 有权
    在混合核成像中使用核排放数据的MR分段/ MR

    公开(公告)号:US20130336564A1

    公开(公告)日:2013-12-19

    申请号:US14001690

    申请日:2012-03-02

    IPC分类号: A61B5/00

    摘要: When generating a magnetic resonance (MR) attenuation map (39), an MR image is segmented to identify a patient's body outline, soft tissue structures, and ambiguous structures comprising bone and/or air. To distinguish between bone and air in the ambiguous structures, a nuclear emission image (e.g., PET) of the same patient or region of interest is segmented. The segmented functional image data is correlated to the segmented MR image data to distinguish between bone and air in the ambiguous structures. Appropriate radiation attenuation values are assigned respectively to identify air voxels and bone voxels in the segmented MR image, and an MR attenuation map is generated from the enhanced segmented MR image, in which ambiguity between air and bone has been resolved. The MR attenuation map is used to generate an attenuation-corrected nuclear image, which is displayed to a user.

    摘要翻译: 当产生磁共振(MR)衰减图(39)时,MR图像被分割以识别患者的身体轮廓,软组织结构以及包含骨和/或空气的不明确的结构。 为了区分不明确结构中的骨骼和空气,将相同患者或感兴趣区域的核发射图像(例如PET)分割。 分割的功能图像数据与分割的MR图像数据相关,以区分不明确结构中的骨骼和空气。 分配适当的辐射衰减值以识别分段MR图像中的空气体素和骨体素,并且从增强的分段MR图像生成MR衰减图,其中空气和骨骼之间的模糊度已被解决。 MR衰减图用于产生被显示给用户的衰减校正的核图像。

    IMAGE RECONSTRUCTION USING DATA ORDERING
    12.
    发明申请
    IMAGE RECONSTRUCTION USING DATA ORDERING 有权
    使用数据订购的图像重构

    公开(公告)号:US20100272335A1

    公开(公告)日:2010-10-28

    申请号:US12279848

    申请日:2007-02-05

    IPC分类号: G06K9/00 G06F12/00 G06F12/08

    CPC分类号: G06K9/00362 G06T11/006

    摘要: Methods, systems and apparatuses for processing data associated with nuclear medical imaging techniques are provided. Data is ordered in LUT's and memory structures. Articles of manufacture are provided for causing computers to carry out aspects of the invention. Data elements are ordered into a plurality of ordered data groups according to a spatial index order, and fetched and processed in the spatial index order. The data elements include sensitivity matrix elements, PET annihilation event data, and system and image matrix elements, the data grouped in orders corresponding to their processing. In one aspect geometric symmetry of a PET scanner FOV is used in ordering the data and processing. In one aspect a system matrix LUT comprises total number of system matrix elements equal to a total number of image matrix elements divided by a total number of possible third index values.

    摘要翻译: 提供了用于处理与核医学成像技术相关的数据的方法,系统和装置。 数据按照LUT和内存结构进行排序。 提供制造用于使计算机执行本发明的方面。 数据元素根据空间索引顺序排列成多个有序数据组,并以空间索引顺序取出并处理。 数据元素包括灵敏度矩阵元素,PET湮灭事件数据,以及系统和图像矩阵元素,数据按照与其处理相对应的顺序分组。 在一个方面,PET扫描器FOV的几何对称性用于排序数据和处理。 在一个方面,系统矩阵LUT包括等于图像矩阵元素的总数除以可能的第三索引值的总数的系统矩阵元素的总数。

    DISTRIBUTED ITERATIVE IMAGE RECONSTRUCTION
    13.
    发明申请
    DISTRIBUTED ITERATIVE IMAGE RECONSTRUCTION 有权
    分布式迭代图像重构

    公开(公告)号:US20070075249A1

    公开(公告)日:2007-04-05

    申请号:US11383831

    申请日:2006-05-17

    IPC分类号: G01T1/166

    摘要: A method and apparatus for performing an iterative image reconstruction uses two or more processors (130). The reconstruction task is distributed among the various processors (130). In one embodiment, the projection space data (300) is distributed among the processors (130). In another embodiment, the object space (200) is distributed among the processors (130).

    摘要翻译: 用于执行迭代图像重建的方法和装置使用两个或更多个处理器(130)。 重建任务分布在各种处理器之间(130)。 在一个实施例中,投影空间数据(300)分布在处理器(130)之间。 在另一个实施例中,对象空间(200)分布在处理器(130)之间。

    TIME-OF-FLIGHT POSITRON EMISSION TOMOGRAPHY RECONSTRUCTION USING IMAGE CONTENT GENERATED EVENT-BY-EVENT BASED ON TIME-OF-FLIGHT INFORMATION
    14.
    发明申请
    TIME-OF-FLIGHT POSITRON EMISSION TOMOGRAPHY RECONSTRUCTION USING IMAGE CONTENT GENERATED EVENT-BY-EVENT BASED ON TIME-OF-FLIGHT INFORMATION 有权
    使用基于时间信息的图像内容生成事件的飞行时间位移重建图像重建

    公开(公告)号:US20120070057A1

    公开(公告)日:2012-03-22

    申请号:US13321192

    申请日:2010-05-04

    IPC分类号: G06K9/00

    CPC分类号: G06T11/005 G06T2211/428

    摘要: A method of processing a positron emission tomography (PET) imaging data set (30) acquired of a subject includes independently localizing each positron-electron annihilation event of the PET imaging data set based on time of flight (TOF) localization of the positron-electron annihilation event to form a generated image (34). The generated image may be displayed. The generated image is suitably used as the basis for an initial image of an iterative reconstruction (40) of the PET imaging data set (30) to produce a reconstructed image (42). A spatial contour (56) of an image of the subject in the PET imaging data set (30) is suitably delineated based on the generated image (34). A subject attenuation map (62) for use in PET image reconstruction (40) is suitably constructed based in part on the spatial contour (56).

    摘要翻译: 一种处理被摄体的正电子发射断层摄影(PET)成像数据集(30)的方法包括基于正电子 - 电子的飞行时间(TOF)定位来独立地定位PET成像数据集的每个正电子 - 电子湮灭事件 湮灭事件以形成生成的图像(34)。 可以显示生成的图像。 生成的图像被适当地用作PET成像数据集(30)的迭代重建(40)的初始图像的基础,以产生重建图像(42)。 基于所生成的图像适当地描绘PET成像数据组(30)中的对象的图像的空间轮廓(56)。 用于PET图像重建(40)的被摄体衰减图(62)部分地基于空间轮廓(56)适当构造。

    Method and system for pet image reconstruction using a surogate image
    15.
    发明授权
    Method and system for pet image reconstruction using a surogate image 有权
    使用异位图像进行宠物图像重建的方法和系统

    公开(公告)号:US08073109B2

    公开(公告)日:2011-12-06

    申请号:US12088090

    申请日:2006-09-14

    IPC分类号: G06K9/00

    摘要: A method and system for use in positron emission tomography, wherein a first processor element (234) is configured to reconstruct a plurality of positron annihilation events detected during a positron emission tomography scan using a list-based reconstruction technique to generate first volumetric data. A second reconstructor (226) is configured to reconstruct the plurality of events using a second reconstruction technique to generate second volumetric data for determining an error correction (228), the error correction applied to the first volumetric data to generate corrected volumetric data for generating a human-readable image (234). In one embodiment a multiplicative error correction is performed on the plurality of events, the first processor element (234) reconstructing the corrected plurality of events; and the second volumetric data error correction comprises an additive error correction.

    摘要翻译: 一种用于正电子发射断层摄影的方法和系统,其中第一处理器元件(234)被配置为使用基于列表的重建技术来重建在正电子发射断层摄影扫描期间检测到的多个正电子湮灭事件以产生第一体积数据。 第二重构​​器(226)被配置为使用第二重建技术来重建多个事件,以产生用于确定纠错(228)的第二体积数据,应用于第一体积数据的误差校正以产生校正的体积数据,以产生 人类可读的图像(234)。 在一个实施例中,对多个事件执行乘法误差校正,第一处理器元件(234)重建校正的多个事件; 并且第二体积数据误差校正包括加法误差校正。

    MR SEGMENTATION USING TRANSMISSION DATA IN HYBRID NUCLEAR/MR IMAGING
    16.
    发明申请
    MR SEGMENTATION USING TRANSMISSION DATA IN HYBRID NUCLEAR/MR IMAGING 失效
    在混合核/ MR成像中使用传输数据的MR分段

    公开(公告)号:US20110164801A1

    公开(公告)日:2011-07-07

    申请号:US13062222

    申请日:2009-09-09

    IPC分类号: G06K9/00

    摘要: When correcting attenuation in a nuclear image (e.g., PET or SPECT), an MR-based attenuation correction (AC) map (16) is generated using MR image data (14) of a subject (60). The subject (60) is then placed in a nuclear imaging device with a radioactive point or line source (18, 18′) from which transmission data is measured as the patient is imaged. In order to resolve ambiguity between air voxels and bone voxels in the MR-based AC map (16), estimated transmission data (24) is generated from the AC map and compared to the measured trans-mission data (22) from the point or line source. An error is iteratively calculated for the estimated and measured transmission data, and attenuation values of the AC map (16) are refined to minimize the error. The refined AC map (32) is used to correct attenuation in collected nuclear data (41) which is reconstructed into an attenuation corrected image (99) of the patient.

    摘要翻译: 当校正核图像(例如PET或SPECT)中的衰减时,使用对象(60)的MR图像数据(14)来生成基于MR的衰减校正(AC)图(16)。 然后将受试者(60)放置在具有放射性点或线源(18,18')的核成像装置中,当患者被成像时从该源成像传播数据。 为了解决基于MR的AC映像(16)中的空气体素和骨骼体素之间的模糊性,从AC映射生成估计的传输数据(24),并与测量的传输数据(22) 线源。 对于估计和测量的传输数据迭代地计算误差,并且AC映射(16)的衰减值被改进以使误差最小化。 精细AC图(32)用于校正收集的核数据(41)中的衰减,其被重建成患者的衰减校正图像(99)。

    USING NON-ATTENUATION CORRECTED PET EMISSION IMAGES TO COMPENSATE FOR INCOMPLETE ANATOMIC IMAGES
    17.
    发明申请
    USING NON-ATTENUATION CORRECTED PET EMISSION IMAGES TO COMPENSATE FOR INCOMPLETE ANATOMIC IMAGES 有权
    使用非衰减校正的PET排放图像补偿不完整的解剖图像

    公开(公告)号:US20110058722A1

    公开(公告)日:2011-03-10

    申请号:US12990285

    申请日:2009-05-04

    IPC分类号: G06K9/00

    摘要: When compensating for truncated patient scan data acquired by a multi-modal PET/CT or PET/MR imaging system (14, 16), such as occurs when a patient is larger than a field of view for an anatomical imaging device, a segmented contour of a non-attenuation-corrected (NAC) PET image is used to identify a contour of the truncated region. An appropriate tissue type is used to fill in truncated regions of a truncated CT or MR image for the attenuation map. The corrected attenuation map is then used to generate an attenuation-corrected PET image of the patient or a region of interest. Alternatively, the system can be employed in PET/CT or PET/MR imaging scenarios where two modalities are performed sequentially (e.g., not simultaneously), and thus the contour derived from the PET scan can be compared to the CT or MR image to infer potential subject motion between the PET and CT or MR scans. Additionally, the system can be employed in PET imaging scenarios where the contour derived from the NAC PET image is used as emission boundary for scatter correction using single-scatter simulation, in which a tail-fitting procedure utilizes an emission boundary to define pure-scatter tails (e.g., in the absence of true coincidence events).

    摘要翻译: 当补偿由多模式PET / CT或PET / MR成像系统(14,16)获取的截断的患者扫描数据时,例如当患者大于解剖成像装置的视野时发生,分割的轮廓 使用非衰减校正(NAC)PET图像来识别截断区域的轮廓。 使用适当的组织类型来填充用于衰减图的截断的CT或MR图像的截断区域。 然后校正的衰减图用于产生患者或感兴趣区域的衰减校正的PET图像。 或者,该系统可以用于PET / CT或PET / MR成像场合,其中顺序执行两种模式(例如,不同时执行),因此可以将从PET扫描导出的轮廓与CT或MR图像进行比较以推断 PET和CT或MR扫描之间的潜在主体运动。 此外,该系统可以用于PET成像场景,其中从NAC PET图像导出的轮廓用作使用单分散模拟的散射校正的发射边界,其中尾部拟合过程利用发射边界来定义纯散射 尾巴(例如,没有真正的巧合事件)。

    Ultrasonic probe and ultrasonic diagnosis apparatus
    18.
    发明授权
    Ultrasonic probe and ultrasonic diagnosis apparatus 有权
    超声波探头和超声波诊断仪

    公开(公告)号:US07834520B2

    公开(公告)日:2010-11-16

    申请号:US11721049

    申请日:2005-12-08

    申请人: Zhiqiang Hu

    发明人: Zhiqiang Hu

    IPC分类号: H04R17/00

    摘要: An ultrasonic probe suitable for reducing reflected waves returning from a rear surface part to a transducer side, and an ultrasonic diagnostic apparatus. Ultrasonic probe 1 comprises transducer 10 transmitting and receiving ultrasonic waves to and from a subject, a backing material 12 disposed on the rear side of the transducer 10, and heat dissipating block 14 stacked on the backside of the backing material 12. At least one of the backing material 12 and heat-dissipating block 14 comprises void 16 therein. A sound absorbing material 18 is desirably filled in void 16.

    摘要翻译: 适用于减少从后表面部分返回到换能器侧的反射波的超声波探头和超声波诊断装置。 超声波探头1包括向被摄体发送和接收超声波的换能器10,设置在换能器10的后侧的背衬材料12和堆叠在背衬材料12的背面上的散热块14。 背衬材料12和散热块14在其中包括空隙16。 吸音材料18期望地填充在空隙16中。

    Time-of-flight positron emission tomography reconstruction using image content generated event-by-event based on time-of-flight information
    19.
    发明授权
    Time-of-flight positron emission tomography reconstruction using image content generated event-by-event based on time-of-flight information 有权
    使用基于飞行时间信息的逐个事件生成的图像内容的飞行时间正电子发射断层扫描重建

    公开(公告)号:US08600139B2

    公开(公告)日:2013-12-03

    申请号:US13321192

    申请日:2010-05-04

    IPC分类号: G06K9/00

    CPC分类号: G06T11/005 G06T2211/428

    摘要: A method of processing a positron emission tomography (PET) imaging data set (30) acquired of a subject includes independently localizing each positron-electron annihilation event of the PET imaging data set based on time of flight (TOF) localization of the positron-electron annihilation event to form a generated image (34). The generated image may be displayed. The generated image is suitably used as the basis for an initial image of an iterative reconstruction (40) of the PET imaging data set (30) to produce a reconstructed image (42). A spatial contour (56) of an image of the subject in the PET imaging data set (30) is suitably delineated based on the generated image (34). A subject attenuation map (62) for use in PET image reconstruction (40) is suitably constructed based in part on the spatial contour (56).

    摘要翻译: 一种处理被摄体的正电子发射断层摄影(PET)成像数据集(30)的方法包括基于正电子 - 电子的飞行时间(TOF)定位来独立地定位PET成像数据集的每个正电子 - 电子湮灭事件 湮灭事件以形成生成的图像(34)。 可以显示生成的图像。 生成的图像被适当地用作PET成像数据集(30)的迭代重建(40)的初始图像的基础,以产生重建图像(42)。 基于所生成的图像适当地描绘PET成像数据组(30)中的对象的图像的空间轮廓(56)。 用于PET图像重建(40)的被摄体衰减图(62)部分地基于空间轮廓(56)适当构造。

    MR segmentation using transmission data in hybrid nuclear/MR imaging
    20.
    发明授权
    MR segmentation using transmission data in hybrid nuclear/MR imaging 失效
    在混合核/ MR成像中使用传输数据进行MR分割

    公开(公告)号:US08406495B2

    公开(公告)日:2013-03-26

    申请号:US13062222

    申请日:2009-09-09

    IPC分类号: G06K9/00

    摘要: When correcting attenuation in a nuclear image (e.g., PET or SPECT), an MR-based attenuation correction (AC) map (16) is generated using MR image data (14) of a subject (60). The subject (60) is then placed in a nuclear imaging device with a radioactive point or line source (18, 18′) from which transmission data is measured as the patient is imaged. In order to resolve ambiguity between air voxels and bone voxels in the MR-based AC map (16), estimated transmission data (24) is generated from the AC map and compared to the measured transmission data (22) from the point or line source. An error is iteratively calculated for the estimated and measured transmission data, and attenuation values of the AC map (16) are refined to minimize the error. The refined AC map (32) is used to correct attenuation in collected nuclear data (41) which is reconstructed into an attenuation corrected image (99) of the patient.

    摘要翻译: 当校正核图像(例如PET或SPECT)中的衰减时,使用对象(60)的MR图像数据(14)来生成基于MR的衰减校正(AC)图(16)。 然后将受试者(60)放置在具有放射性点或线源(18,18')的核成像装置中,当患者被成像时从该源成像传播数据。 为了解决基于MR的AC映射(16)中的空气体素和骨骼体素之间的模糊性,从AC映射产生估计的传输数据(24),并与来自点或线源的测量的传输数据(22)进行比较 。 对于估计和测量的传输数据迭代地计算误差,并且AC映射(16)的衰减值被改进以使误差最小化。 精细AC图(32)用于校正收集的核数据(41)中的衰减,其被重建成患者的衰减校正图像(99)。