Completion of a Truncated Attenuation Image From the Attenuated PET Emission Data

被引：107

作者：

Nuyts, Johan ^{[1
]}

Bal, Girish ^{[2
]}

Kehren, Frank ^{[2
]}

Fenchel, Matthias ^{[3
]}

Michel, Christian ^{[2
]}

Watson, Charles ^{[2
]}

机构：

[1] Katholieke Univ Leuven, B-3000 Louvain, Belgium

[2] Siemens Med Solut, Knoxville, TN 37932 USA

[3] Siemens AG, D-91056 Erlangen, Germany

来源：

IEEE TRANSACTIONS ON MEDICAL IMAGING | 2013年 / 32卷 / 02期

关键词：

Attenuation correction; image reconstruction; positron emission tomography/magnetic resonance (PET/MR); A-POSTERIORI RECONSTRUCTION; MAXIMUM-LIKELIHOOD; TOMOGRAPHY; ALGORITHM; SPECT; MAP; PARAMETERS; CT;

D O I：

10.1109/TMI.2012.2220376

中图分类号：

TP39 [计算机的应用];

学科分类号：

081203 ; 0835 ;

摘要：

Positron emission tomographs (PETs) are currently almost exclusively designed as hybrid systems. The current standard is the PET/CT combination, while prototype PET/MRI systems are being studied by several research groups. One problem in these systems is that the transaxial field-of-view of the second system is smaller than that of the PET camera and does not provide complete attenuation data. Because this second system provides the image for PET attenuation and scatter correction, the smaller FOV causes truncation of the attenuation map, producing bias in the attenuation corrected activity image. In this paper, we propose a maximum-a-posteriori algorithm for estimating the missing part of the attenuation map from the PET emission data. The method is evaluated on five artificially truncated F-18-FDGOET/CT studies, where it reduced the error on the reconstructed PET activities from 20% to less than 7%. The results on a PET/MRI patient study with F-18-FDG are presented as well.

引用

页码：237 / 246

页数：10

共 32 条

[1]

[Anonymous], 2008, Applied iterative methods

[2]

[Anonymous], IEEE T NUCL SCI

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