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    • 1. 发明申请
    • METHOD AND SYSTEM FOR PET IMAGE RECONSTRUCTION USING A SURROGATE IMAGE
    • 用图像重建PET图像的方法和系统
    • WO2007039841A2
    • 2007-04-12
    • PCT/IB2006053287
    • 2006-09-14
    • KONINKL PHILIPS ELECTRONICS NVGAGNON DANIELWANG WENLIHU ZHIQIANG
    • GAGNON DANIELWANG WENLIHU ZHIQIANG
    • G01T1/2985A61B6/037G01T1/1611G06T11/006
    • 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.
    • 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没事件以生成第一体积数据。 第二重建器(226)被配置为使用第二重建技术来重建多个事件以生成用于确定错误校正的第二体数据(228),所述错误校正被应用于第一体数据以生成校正的体数据以用于生成 人类可读的图像(234)。 在一个实施例中,对多个事件执行乘性误差校正,第一处理器元件(234)重构校正后的多个事件; 并且第二体积数据误差校正包括附加误差校正。
    • 2. 发明申请
    • IMAGE RECONSTRUCTION USING DATA ORDERING
    • 使用数据订购的图像重构
    • WO2007100954A2
    • 2007-09-07
    • PCT/US2007061595
    • 2007-02-05
    • KONINKL PHILIPS ELECTRONICS NVHU ZHIQIANGWANG WENLIGAGNON DANIEL
    • HU ZHIQIANGWANG WENLIGAGNON DANIEL
    • G06T11/00
    • G06K9/00362G06T11/006
    • 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.
    • 提供了用于处理与核医学成像技术相关联的数据的方法,系统和装置。 数据在LUT和存储器结构中排序。 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,数据按与它们的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。
    • 4. 发明申请
    • ATTENUATION CORRECTION OF MR COILS IN A HYBRID PET/MR SYSTEM
    • 混合PET / MR系统中MR线圈的衰减校正
    • WO2010097714A3
    • 2011-08-11
    • PCT/IB2010050218
    • 2010-01-18
    • KONINKL PHILIPS ELECTRONICS NVPAL DEBASHISHHU ZHIQIANGTUNG CHI-HUAGUO TIANRUIKASTE JEFFREY
    • PAL DEBASHISHHU ZHIQIANGTUNG CHI-HUAGUO TIANRUIKASTE JEFFREY
    • G01T1/16G01R33/48G01T1/164
    • G01T1/1648A61B5/0035A61B5/055A61B6/032A61B6/037A61B6/12A61B6/4417A61B6/5205A61B6/5235A61B6/5247A61B6/5258A61B6/5294A61B6/58G01R33/481G01T1/1603
    • Nuclear image data generated by a multimodal imaging device, such as a combined position emission tomography (PET)/magnetic resonance (MR) scanner (12, 14), is attenuation-corrected with a combined patient-specific attenuation correction (AC) map and an AC map template (70) for an MR coil (72) that is present in both the nuclear and MR scanning procedures. A template library (46) contains templates for each of a plurality of MR coils and other accessories. Each template is generated on one of two manners. The coil may be imaged inside the PET scanner 14 with the transmission source 16 (e.g., Ge-68 or Cs-137). A transmission image 48 is reconstructed using the known algorithms and may be used as the AC template directly. Alternatively, the template can be generated by creating a global histogram of the transmission image and identifying segments of the coil or other accessory. An average linear attenuation coefficient (LAC) value is determined from the distribution of the histogram. The coil or other accessory is imaged using a high resolution CT scan, and the CT image is segmented and assigned the computed LAC values determined from the distribution of the histogram to create the AC map template for the coil.
    • 由多模式成像装置(例如组合位置发射断层扫描(PET)/磁共振(MR)扫描仪(12,14))生成的核图像数据用组合的患者特异性衰减校正(AC)图和 用于MR线圈(72)的AC映射模板(70),其存在于核和MR扫描过程中。 模板库(46)包含用于多个MR线圈和其他附件中的每一个的模板。 每个模板都以两种方式之一生成。 线圈可以利用透射源16(例如Ge-68或Cs-137)在PET扫描器14内成像。 使用已知算法重构发送图像48,并且可以直接用作AC模板。 或者,可以通过创建传输图像的全局直方图并识别线圈或其他附件的段来生成模板。 根据直方图的分布确定平均线性衰减系数(LAC)值。 使用高分辨率CT扫描对线圈或其他附件进行成像,并且对CT图像进行分割并分配从直方图的分布确定的计算的LAC值,以创建线圈的AC图谱模板。