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Published in: European Journal of Nuclear Medicine and Molecular Imaging 4/2018

01-04-2018 | Original Article

11C–MET PET/MRI for detection of recurrent glioma

Authors: C. Deuschl, J. Kirchner, T. D. Poeppel, B. Schaarschmidt, S. Kebir, N. El Hindy, J. Hense, H. H. Quick, M. Glas, K. Herrmann, L. Umutlu, C. Moenninghoff, A. Radbruch, M. Forsting, M. Schlamann

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 4/2018

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Abstract

Introduction

Radiological assessment of brain tumors is widely based on the Radiology Assessment of Neuro-Oncology (RANO) criteria that consider non-specific T1 and T2 weighted images. Limitation of the RANO criteria is that they do not include metabolic imaging techniques that have been reported to be helpful to differentiate treatment related changes from true tumor progression. In the current study, we assessed if the combined use of MRI and PET with hybrid 11C–MET PET/MRI can improve diagnostic accuracy and diagnostic confidence of the readers to differentiate treatment related changes from true progression in recurrent glioma.

Methods

Fifty consecutive patients with histopathologically proven glioma were prospectively enrolled for a hybrid 11C–MET PET/MRI to differentiate recurrent glioma from treatment induced changes. Sole MRI data were analyzed based on RANO. Sole PET data and in a third evaluation hybrid 11C–MET-PET/MRI data were assessed for metabolic respectively metabolic and morphologic glioma recurrence. Diagnostic performance and diagnostic confidence of the reader were calculated for the different modalities, and the McNemar test and Mann-Whitney U Test were applied for statistical analysis.

Results

Hybrid 11C–MET PET/MRI was successfully performed in all 50 patients. Glioma recurrence was diagnosed in 35 of the 50 patients (70%). Sensitivity and specificity were calculated for MRI (86.11% and 71.43%), for 11C–MET PET (96.77% and 73.68%), and for hybrid 11C–MET-PET/MRI (97.14% and 93.33%). For diagnostic accuracy hybrid 11C–MET-PET/MRI (96%) showed significantly higher values than MRI alone (82%), whereas no significant difference was found for 11C–MET PET (88%). Furthermore, by rating on a five-point Likert scale significantly higher scores were found for diagnostic confidence when comparing 11C–MET PET/MRI (4.26 ± 0,777) to either PET alone (3.44 ± 0.705) or MRI alone (3.56 ± 0.733).

Conclusion

This feasibility study showed that hybrid PET/MRI might strengthen RANO classification by adding metabolic information to conventional MRI information. Future studies should evaluate the clinical utility of the combined use of 11C–MET PET/MRI in larger patient cohorts.
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Metadata
Title
11C–MET PET/MRI for detection of recurrent glioma
Authors
C. Deuschl
J. Kirchner
T. D. Poeppel
B. Schaarschmidt
S. Kebir
N. El Hindy
J. Hense
H. H. Quick
M. Glas
K. Herrmann
L. Umutlu
C. Moenninghoff
A. Radbruch
M. Forsting
M. Schlamann
Publication date
01-04-2018
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 4/2018
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-017-3916-9

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