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EJNMMI Research
Published in: EJNMMI Research 1/2020

01-12-2020 | Magnetic Resonance Imaging | Original research

Regional SUV quantification in hybrid PET/MR, a comparison of two atlas-based automatic brain segmentation methods

Authors: Weiwei Ruan, Xun Sun, Xuehan Hu, Fang Liu, Fan Hu, Jinxia Guo, Yongxue Zhang, Xiaoli Lan

Published in: EJNMMI Research | Issue 1/2020

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Abstract

Background

Quantitative analysis of brain positron-emission tomography (PET) depends on structural segmentation, which can be time-consuming and operator-dependent when performed manually. Previous automatic segmentation usually registered subjects’ images onto an atlas template (defined as RSIAT here) for group analysis, which changed the individuals’ images and probably affected regional PET segmentation. In contrast, we could register atlas template to subjects’ images (RATSI), which created an individual atlas template and may be more accurate for PET segmentation. We segmented two representative brain areas in twenty Parkinson disease (PD) and eight multiple system atrophy (MSA) patients performed in hybrid positron-emission tomography/magnetic resonance imaging (PET/MR). The segmentation accuracy was evaluated using the Dice coefficient (DC) and Hausdorff distance (HD), and the standardized uptake value (SUV) measurements of these two automatic segmentation methods were compared, using manual segmentation as a reference.

Results

The DC of RATSI increased, and the HD decreased significantly (P < 0.05) compared with the RSIAT in PD, while the results of one-way analysis of variance (ANOVA) found no significant differences in the SUVmean and SUVmax among the two automatic and the manual segmentation methods. Further, RATSI was used to compare regional differences in cerebral metabolism pattern between PD and MSA patients. The SUVmean in the segmented cerebellar gray matter for the MSA group was significantly lower compared with the PD group (P < 0.05), which is consistent with previous reports.

Conclusion

The RATSI was more accurate for the caudate nucleus and putamen automatic segmentation and can be used for regional PET analysis in hybrid PET/MR.
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Metadata
Title
Regional SUV quantification in hybrid PET/MR, a comparison of two atlas-based automatic brain segmentation methods
Authors
Weiwei Ruan
Xun Sun
Xuehan Hu
Fang Liu
Fan Hu
Jinxia Guo
Yongxue Zhang
Xiaoli Lan
Publication date
01-12-2020
Publisher
Springer Berlin Heidelberg
Published in
EJNMMI Research / Issue 1/2020
Electronic ISSN: 2191-219X
DOI
https://doi.org/10.1186/s13550-020-00648-8

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