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1. 发明申请

WO2010097714A2 ATTENUATION CORRECTION OF MR COILS IN A HYBRID PET/MR SYSTEM 审中-公开
标题翻译：混合PET / MR系统中MR线圈的衰减校正
公开(公告)号：WO2010097714A2
公开(公告)日：2010-09-02
申请号：PCT/IB2010/050218
申请日：2010-01-18
申请人： KONINKLIJKE PHILIPS ELECTRONICS, N.V. , PAL, Debashish , HU, Zhiqiang , TUNG, Chi-hua , GUO, Tianrui , KASTE, Jeffrey
发明人： PAL, Debashish , HU, Zhiqiang , TUNG, Chi-hua , GUO, Tianrui , KASTE, Jeffrey
IPC分类号： G01T1/164
CPC分类号： G01T1/1648 , A61B5/0035 , A61B5/055 , A61B6/032 , A61B6/037 , A61B6/12 , A61B6/4417 , A61B6/5205 , A61B6/5235 , A61B6/5247 , A61B6/5258 , A61B6/5294 , A61B6/58 , G01R33/481 , G01T1/1603
摘要： 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.
摘要翻译：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））产生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。

2. 发明申请

WO2010097714A3 ATTENUATION CORRECTION OF MR COILS IN A HYBRID PET/MR SYSTEM 审中-公开
标题翻译：混合PET / MR系统中MR线圈的衰减校正
公开(公告)号：WO2010097714A3
公开(公告)日：2011-08-11
申请号：PCT/IB2010050218
申请日：2010-01-18
申请人： KONINKL PHILIPS ELECTRONICS NV , PAL DEBASHISH , HU ZHIQIANG , TUNG CHI-HUA , GUO TIANRUI , KASTE JEFFREY
发明人： PAL DEBASHISH , HU ZHIQIANG , TUNG CHI-HUA , GUO TIANRUI , KASTE JEFFREY
IPC分类号： G01T1/16 , G01R33/48 , G01T1/164
CPC分类号： G01T1/1648 , A61B5/0035 , A61B5/055 , A61B6/032 , A61B6/037 , A61B6/12 , A61B6/4417 , A61B6/5205 , A61B6/5235 , A61B6/5247 , A61B6/5258 , A61B6/5294 , A61B6/58 , G01R33/481 , G01T1/1603
摘要： 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.
摘要翻译：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。

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