Abstract #1409
Influence of patient motion in bone tissue maps obtained with ultra-short echo time MR
Patrick Veit-Haibach 1 , Michael Carl 2 , Mehdi Khalighi 2 , Florian Wiesinger 3 , Konstantinos Zeimpekis 1 , and Gaspar Delso 2
1
University Hospital, Zurich, Switzerland,
2
Global
MR Applications & Workflow, GE Healthcare, WI, United
States,
3
GE
Global Research, Munich, Germany
Accurate mapping of the attenuation properties of
patient tissue is instrumental for quantitative positron
emission tomography (PET). In hybrid PET/MR scanners,
this can be achieved using dedicated MR images to
identify tissue classes of known attenuation (e.g. fat,
lung, air). For the particular case of bone tissue,
standard sequences are not adequate due to the fast T2*
relaxation time. Ultra-short echo time (UTE) sequences
have been reported to provide adequate bone tissue
identification for the purposes of PET attenuation
correction. These sequences do, however, require
acquisition times in the order of 2 to 5 minutes to
cover a typical PET station. Such long acquisition times
increase the probability of patient movement occurring
during the acquisition. In this study, we analyze the
artifacts introduced by patient motion on the bone maps
obtained with UTE.
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