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Published in: European Journal of Nuclear Medicine and Molecular Imaging 4/2022

Open Access 01-03-2022 | Positron Emission Tomography | Original Article

A novel analytic approach for outcome prediction in diffuse large B-cell lymphoma by [18F]FDG PET/CT

Authors: Xiaohui Zhang, Lin Chen, Han Jiang, Xuexin He, Liu Feng, Miaoqi Ni, Mindi Ma, Jing Wang, Teng Zhang, Shuang Wu, Rui Zhou, Chentao Jin, Kai Zhang, Wenbin Qian, Zexin Chen, Cheng Zhuo, Hong Zhang, Mei Tian

Published in: European Journal of Nuclear Medicine and Molecular Imaging | Issue 4/2022

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Abstract

Purpose

This study aimed to develop a novel analytic approach based on 2-deoxy-2-[18F]fluoro-D-glucose positron emission tomography/computed tomography ([18F]FDG PET/CT) radiomic signature (RS) and International Prognostic Index (IPI) to predict the progression-free survival (PFS) and overall survival (OS) of patients with diffuse large B-cell lymphoma (DLBCL).

Methods

We retrospectively enrolled 152 DLBCL patients and divided them into a training cohort (n = 100) and a validation cohort (n = 52). A total of 1245 radiomic features were extracted from the total metabolic tumor volume (TMTV) and the metabolic bulk volume (MBV) of pre-treatment PET/CT images. The least absolute shrinkage and selection operator (LASSO) algorithm was applied to develop the RS. Cox regression analysis was used to construct hybrid nomograms based on different RS and clinical variables. The performances of hybrid nomograms were evaluated using the time-dependent receiver operator characteristic (ROC) curve and the Hosmer–Lemeshow test. The clinical utilities of prediction nomograms were determined via decision curve analysis. The predictive efficiency of different RS, clinical variables, and hybrid nomograms was compared.

Results

The RS and IPI were identified as independent predictors of PFS and OS, and were selected to construct hybrid nomograms. Both TMTV- and MBV-based hybrid nomograms had significantly higher values of area under the curve (AUC) than IPI in training and validation cohorts (all P < 0.05), while no significant difference was found between TMTV- and MBV-based hybrid nomograms (P > 0.05). The Hosmer–Lemeshow test showed that both TMTV- and MBV-based hybrid nomograms calibrated well in the training and validation cohorts (all P > 0.05). Decision curve analysis indicated that hybrid nomograms had higher net benefits than IPI.

Conclusion

The hybrid nomograms combining RS with IPI could significantly improve survival prediction in DLBCL. Radiomic analysis on MBV may serve as a potential approach for prognosis assessment in DLBCL.

Trial registration

NCT04317313. Registered March 16, 2020. Public site: https://​clinicaltrials.​gov/​ct2/​show/​NCT04317313
Appendix
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Metadata
Title
A novel analytic approach for outcome prediction in diffuse large B-cell lymphoma by [18F]FDG PET/CT
Authors
Xiaohui Zhang
Lin Chen
Han Jiang
Xuexin He
Liu Feng
Miaoqi Ni
Mindi Ma
Jing Wang
Teng Zhang
Shuang Wu
Rui Zhou
Chentao Jin
Kai Zhang
Wenbin Qian
Zexin Chen
Cheng Zhuo
Hong Zhang
Mei Tian
Publication date
01-03-2022
Publisher
Springer Berlin Heidelberg
Published in
European Journal of Nuclear Medicine and Molecular Imaging / Issue 4/2022
Print ISSN: 1619-7070
Electronic ISSN: 1619-7089
DOI
https://doi.org/10.1007/s00259-021-05572-0

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