Highlights
- •Clinical response to BACE in lung cancer varies among patients with similar features.
- •Radiomics signatures exhibited excellent performance in predicting early recurrence.
- •The combined model exhibits high clinical utility.
Rationale and Objectives
Bronchial arterial chemoembolization (BACE) was deemed as an effective and safe approach
for advanced standard treatment-ineligible/rejected lung cancer patients. However,
the therapeutic outcome of BACE varies greatly and there is no reliable prognostic
tool in clinical practice. This study aimed to investigate the effectiveness of radiomics
features in predicting tumor recurrence after BACE treatment in lung cancer patients.
Materials and Methods
A total of 116 patients with pathologically confirmed lung cancer who received BACE
treatment were retrospectively recruited. All patients underwent contrast-enhanced
CT within 2 weeks before BACE treatment and were followed up for more than 6 months.
We conducted a machine learning-based characterization of each lesion on the preoperative
contrast-enhanced CT images. In the training cohort, recurrence-related radiomics
features were screened by least absolute shrinkage and selection operator (LASSO)
regression. Three predictive radiomics signatures were built with linear discriminant
analysis (LDA), support vector machine (SVM) and logistic regression (LR) algorithms,
respectively. Univariate and multivariate LR analyses were performed to select the
independent clinical predictors for recurrence. The radiomics signature with best
predictive performance was integrated with the clinical predictors to form a combined
model, which was visualized as a nomogram. The performance of the combined model was
assessed by receiver operating characteristic curve (ROC), calibration curve, and
decision curve analysis (DCA).
Results
Nine recurrence-related radiomics features were screened out, and three radiomics
signatures (RadscoreLDA, RadscoreSVM and RadscoreLR) were built based on these features. Patients were classified into the low-risk and
high-risk groups based on the optimal threshold of three signatures. Progression-free
survival (PFS) analysis showed that patients of low-risk group achieved longer PFS
than patients of high-risk group (P < 0.05). The combined model including RadscoreLDA and independent clinical predictors (tumor size, carcinoembryonic antigen and pro-gastrin
releasing peptide) achieved the best predictive performance for recurrence after BACE
treatment. It yields AUCs of 0.865 and 0.867 in the training and validation cohorts,
with accuracy (ACC) of 0.804 and 0.750, respectively. Calibration curves indicated
that the probability of recurrence predicted by the model fits well with the actual
recurrence probability. DCA showed that the radiomics nomogram was clinically useful.
Conclusion
The radiomics and clinical predictors-based nomogram can predict tumor recurrence
after BACE treatment effectively, which allowing oncologists to identify potential
recurrence and enable better patient management and clinical decision-making.
Abbreviations:
BACE (bronchial arterial chemoembolization), ER (early recurrence), CT (computed tomography), MRI (magnetic resonance imaging), CTA (CT angiography), DCA (decision curve analysis), PFS (progression-free survival), mRECIST (modified Response Evaluation Criteria in Solid Tumors), LASSO (least absolute shrinkage and selection operator), LDA (linear discriminant analysis), SVM (support vector machine), LR (logistic regression), ORR (objective response rate), DCR (disease control rate), AUC (area under the curve), ROC (receiver operating characteristic), ECOG (Eastern Cooperative Oncology Group), VOI (volume of interest), 95% CI (95% confidence interval), GLSZM (grey-level size zone matrix), GLCM (grey-level co-occurrence matrix), GLRLM (gray-level run length matrix), GLDM (gray-level dependence matrix), NGTDM (neighbouring gray tone difference matrix), TBIL (total bilirubin), CEA (carcinoembryonic antigen), SCC (squamous cell carcinoma antigen), CYFRA21.1 (cytokeratin-19-fragment CYFRA21-1), NSE (neuron-specific enolase), ProGRP (pro-gastrin releasing peptide)Key Words
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Article info
Publication history
Published online: May 22, 2023
Accepted:
April 13,
2023
Received in revised form:
April 12,
2023
Received:
March 4,
2023
Publication stage
In Press Corrected ProofIdentification
Copyright
© 2023 The Association of University Radiologists. Published by Elsevier Inc. All rights reserved All rights reserved.