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Magnetic Resonance Materials in Physics, Biology and Medicine

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Open Access 01-02-2013 | Review Article

MRI for attenuation correction in PET: methods and challenges

Authors: Gudrun Wagenknecht, Hans-Jürgen Kaiser, Felix M. Mottaghy, Hans Herzog

Published in: Magnetic Resonance Materials in Physics, Biology and Medicine | Issue 1/2013

Abstract

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.

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Title: MRI for attenuation correction in PET: methods and challenges
Authors: Gudrun Wagenknecht
Hans-Jürgen Kaiser
Felix M. Mottaghy
Hans Herzog
Publication date: 01-02-2013
Publisher: Springer-Verlag
Published in: Magnetic Resonance Materials in Physics, Biology and Medicine / Issue 1/2013
Print ISSN: 0968-5243
Electronic ISSN: 1352-8661
DOI: https://doi.org/10.1007/s10334-012-0353-4

At a glance: The STEP trials

Springer Medicine

MRI for attenuation correction in PET: methods and challenges

Abstract

At a glance: The STEP trials

Springer Medicine

Abstract

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