Abstract
Objectives
To determine the utility of amide proton transfer-weighted (APTw) MR imaging in distinguishing solitary brain metastases (SBMs) from glioblastomas (GBMs).
Methods
Forty-five patients with SBMs and 43 patients with GBMs underwent conventional and APT-weighted sequences before clinical intervention. The APTw parameters and relative APTw (rAPTw) parameters in the tumour core and the peritumoral brain zone (PBZ) were obtained and compared between SBMs and GBMs. The receiver-operating characteristic (ROC) curve was used to assess the best parameter for distinguishing between the two groups.
Results
The APTwmax, APTwmin, APTwmean, rAPTwmax, rAPTwmin or rAPTwmean values in the tumour core were not significantly different between the SBM and GBM groups (P = 0.141, 0.361, 0.221, 0.305, 0.578 and 0.448, respectively). However, the APTwmax, APTwmin, APTwmean, rAPTwmax, rAPTwmin or rAPTwmean values in the PBZ were significantly lower in the SBM group than in the GBM group (P < 0.001). The APTwmin values had the highest area under the ROC curve 0.905 and accuracy 85.2% in discriminating between the two neoplasms.
Conclusion
As a noninvasive imaging method, APT-weighted MR imaging can be used to distinguish SBMs from GBMs.
Key Points
• APTw values in the tumour core were not different between SBMs and GBMs.
• APTw values in peritumoral brain zone were lower in SBMs than in GBMs.
• The APTw min was the best parameter to distinguish SBMs from GBMs.
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Abbreviations
- GBM:
-
Glioblastoma
- SBM:
-
Solitary brain metastases
- APT:
-
Amide proton transfer
- APTw:
-
APT-weighted
- rAPTw:
-
Relative APTw
- CEST:
-
Chemical exchange-based saturation transfer
- CNAWM:
-
Contralateral normal-appearing white matter
- Gd:
-
Gadolinium
- H&E:
-
Haematoxylin and eosin
- PBZ:
-
Peritumoral brain zone
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Acknowledgements
This study was partially supported by grants from National Natural Science Foundation of China (81171322), Guangdong Provincial Natural Science Foundation (2014A030313271, S2012010009114), Guangdong Provincial Science and Technology Project (2014A020212726), Southern Medical University clinical research project (LC2016ZD028) and the National Institutes of Health (R01EB009731, R01CA166171).
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The scientific guarantor of this publication is Zhibo Wen, MD.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Funding
This study is partially supported by grants from National Natural Science Foundation of China (81171322), Natural Science Foundation of Guangdong Province (2014A030313271), Guangdong Provincial Science and Technology Project (2014A020212726), Natural Science Foundation of Guangdong Province (S2012010009114), Southern Medical University clinical research project (LC2016ZD028) and the National Institutes of Health (R01EB009731, R01CA166171).
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No complex statistical methods were necessary for this article.
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Written informed consent was obtained from all subjects (patients) in this study.
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Institutional Review Board approval was obtained.
Methodology
• retrospective
• diagnostic or prognostic study
• performed at one institution
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Yu, H., Lou, H., Zou, T. et al. Applying protein-based amide proton transfer MR imaging to distinguish solitary brain metastases from glioblastoma. Eur Radiol 27, 4516–4524 (2017). https://doi.org/10.1007/s00330-017-4867-z
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DOI: https://doi.org/10.1007/s00330-017-4867-z