TY  - JOUR
AU  - Wagenknecht, Gudrun
AU  - Kaiser, Hans-Jürgen
AU  - Mottaghy, Felix M.
AU  - Herzog, Hans
TI  - MRI for attenuation correction in PET: methods and challenges
JO  - Magnetic resonance materials in physics, biology and medicine
VL  - 26
IS  - 1
SN  - 1352-8661
CY  - Heidelberg
PB  - Springer
M1  - FZJ-2013-01090
SP  - 99-113
PY  - 2013
AB  - Abstract In current combined PET/MR systems, PET attenuation correction is based on MRI, since the small bore insideMRI systems and the strongmagnetic field do not permit a rotating PET transmission source or a CT device to be integrated. Unlike CTmeasurements in PET/CT scanners, the MR signal is not directly correlated to tissue density andthus 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.
LB  - PUB:(DE-HGF)16
C6  - pmid: 23179594
UR  - <Go to ISI:>//WOS:000314888300009
DO  - DOI:10.1007/s10334-012-0353-4
UR  - https://juser.fz-juelich.de/record/131826
ER  -