MRI for attenuation correction in PET: methods and challenges

被引：173

作者：

Wagenknecht, Gudrun ^{[1
]}

Kaiser, Hans-Juergen ^{[2
]}

Mottaghy, Felix M. ^{[2
,3
]}

Herzog, Hans ^{[4
]}

机构：

[1] Forschungszentrum Julich, Cent Inst Elect, D-52425 Julich, Germany

[2] Rhein Westfal TH Aachen, Dept Nucl Med, Univ Hosp, Aachen, Germany

[3] Maastricht Univ, Dept Nucl Med, Med Ctr, Maastricht, Netherlands

[4] Forschungszentrum Julich, Inst Neurosci & Med, D-52425 Julich, Germany

来源：

MAGNETIC RESONANCE MATERIALS IN PHYSICS BIOLOGY AND MEDICINE | 2013年 / 26卷 / 01期

关键词：

PET/MR; MR-based attenuation correction; Brain; Whole body; Coils; Truncation artefact; DIXON TECHNIQUE; SURFACE COILS; CT IMAGES; PET/MRI; SEGMENTATION; SYSTEMS; DESIGN; ATLAS; RECONSTRUCTION; DECOMPOSITION;

D O I：

10.1007/s10334-012-0353-4

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

In current combined PET/MR systems, PET attenuation correction is based on MRI, since the small bore inside MRI systems and the strong magnetic field do not permit a rotating PET transmission source or a CT device to be integrated. Unlike CT measurements in PET/CT scanners, the MR signal is not directly correlated to tissue density and thus cannot be converted by a simple transformation of intensity values. Various approaches have been developed based on templates, atlas information, direct segmentation of T1-weighted MR images, or segmentation of images from special MR sequences. The advantages and disadvantages of these approaches as well as additional challenges will be discussed in this review.

引用

页码：99 / 113

页数：15

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