Abstract
Objectives
This study aimed to explore the predictive value of intravoxel incoherent motion diffusion-weighted imaging (IVIM-DWI) and diffusion kurtosis imaging (DKI) quantitative parameters for the response to neoadjuvant chemo-immunotherapy (NCIT) in resectable non-small-cell lung cancer (NSCLC) patients, so as to provide a basis for clinical individualized precision treatment.
Methods
Treatment naive locally advanced NSCLC patients who enrolled in 3 prospective, open-label, and single-arm clinical trials and received NCIT were retrospectively analyzed in this study. Functional MRI imaging was performed at baseline and following 3 weeks of treatment as an exploratory endpoint to evaluate treatment efficacy. Univariate and multivariate logistic regressions were used to identify independent predictive parameters for NCIT response. Prediction models were built with statistically significant quantitative parameters and their combinations.
Results
In total of 32 patients, 13 were classified as complete pathological response (pCR) and 19 were non-pCR. Post-NCIT ADC, ΔADC, and ΔD values in the pCR group were significantly higher than those in the non-pCR group, while the pre-NCIT D, post-NCIT Kapp, and ΔKapp were significantly lower than those in non-pCR group. Multivariate logistic regression analysis demonstrated that pre-NCIT D and post-NCIT Kapp values were independent predictors for NCIT response. The combined predictive model, which consisted of IVIM-DWI and DKI, showed the best prediction performance with AUC of 0.889.
Conclusions
The pre-NCIT D, post-NCIT parameters (ADC and Kapp) and Δ parameters (ΔADC, ΔD, and ΔKapp) were effective biomarkers for predicting pathologic response, and pre-NCIT D and post-NCIT Kapp values were independent predictors of NCIT response for NSCLC patients.
Clinical relevance statement
This exploratory study indicated that IVIM-DWI and DKI MRI imaging would predict pathologic response of neoadjuvant chemo-immunotherapy in locally advanced NSCLC patients at initial state and early treatment, which could help make clinical individualized treatment strategies.
Key Points
• Effective NCIT treatment resulted in increased ADC and D values for NSCLC patients.
• The residual tumors in non-pCR group tend to have higher microstructural complexity and heterogeneity, as measured by Kapp.
• Pre-NCIT D and post-NCIT Kapp values were independent predictors of NCIT response.
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Abbreviations
- ADC:
-
Apparent diffusion coefficients
- AUC:
-
Area under curve
- DKI:
-
Diffusion kurtosis imaging
- IVIM:
-
Intravoxel incoherent motion
- K app :
-
Apparent diffusion kurtosis
- MPR:
-
Major pathologic response
- NCIT:
-
Neoadjuvant chemo-immunotherapy
- NSCLC:
-
Non-small-cell lung cancer
- pCR:
-
Complete pathological response
- ROC:
-
Receiver operating characteristic curve
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The scientific guarantor of this publication is Jingyun Shi.
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Siyang Wang kindly provided statistical advice for this manuscript.
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The informed consents were obtained from all patients and the studies were approved by the local independent ethic committee (ID: 19218XW, 19216XW, 19217XW).
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Bao, X., Bian, D., Yang, X. et al. Multiparametric MRI for evaluation of pathological response to the neoadjuvant chemo-immunotherapy in resectable non-small-cell lung cancer. Eur Radiol 33, 9182–9193 (2023). https://doi.org/10.1007/s00330-023-09813-8
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DOI: https://doi.org/10.1007/s00330-023-09813-8