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Preoperative MRI radiomic analysis for predicting local tumor progression in colorectal liver metastases before microwave ablation.
- Source :
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International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group [Int J Hyperthermia] 2024; Vol. 41 (1), pp. 2349059. Date of Electronic Publication: 2024 May 16. - Publication Year :
- 2024
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Abstract
- Purpose: Radiomics may aid in predicting prognosis in patients with colorectal liver metastases (CLM). Consistent data is available on CT, yet limited data is available on MRI. This study assesses the capability of MRI-derived radiomic features (RFs) to predict local tumor progression-free survival (LTPFS) in patients with CLMs treated with microwave ablation (MWA).<br />Methods: All CLM patients with pre-operative Gadoxetic acid-MRI treated with MWA in a single institution between September 2015 and February 2022 were evaluated. Pre-procedural information was retrieved retrospectively. Two observers manually segmented CLMs on T2 and T1-Hepatobiliary phase (T1-HBP) scans. After inter-observer variability testing, 148/182 RFs showed robustness on T1-HBP, and 141/182 on T2 (ICC > 0.7).Cox multivariate analysis was run to establish clinical (CLIN-mod), radiomic (RAD-T1, RAD-T2), and combined (COMB-T1, COMB-T2) models for LTPFS prediction.<br />Results: Seventy-six CLMs (43 patients) were assessed. Median follow-up was 14 months. LTP occurred in 19 lesions (25%).CLIN-mod was composed of minimal ablation margins (MAMs), intra-segment progression and primary tumor grade and exhibited moderately high discriminatory power in predicting LTPFS (AUC = 0.89, p = 0.0001). Both RAD-T1 and RAD-T2 were able to predict LTPFS: (RAD-T1: AUC = 0.83, p = 0.0003; RAD-T2: AUC = 0.79, p = 0.001). Combined models yielded the strongest performance (COMB-T1: AUC = 0.98, p = 0.0001; COMB-T2: AUC = 0.95, p = 0.0003). Both combined models included MAMs and tumor regression grade; COMB-T1 also featured 10 <superscript>th</superscript> percentile of signal intensity, while tumor flatness was present in COMB-T2.<br />Conclusion: MRI-based radiomic evaluation of CLMs is feasible and potentially useful for LTP prediction. Combined models outperformed clinical or radiomic models alone for LTPFS prediction.
- Subjects :
- Humans
Male
Female
Middle Aged
Aged
Microwaves therapeutic use
Retrospective Studies
Disease Progression
Adult
Radiomics
Colorectal Neoplasms pathology
Colorectal Neoplasms diagnostic imaging
Liver Neoplasms diagnostic imaging
Liver Neoplasms secondary
Liver Neoplasms surgery
Magnetic Resonance Imaging methods
Subjects
Details
- Language :
- English
- ISSN :
- 1464-5157
- Volume :
- 41
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- International journal of hyperthermia : the official journal of European Society for Hyperthermic Oncology, North American Hyperthermia Group
- Publication Type :
- Academic Journal
- Accession number :
- 38754994
- Full Text :
- https://doi.org/10.1080/02656736.2024.2349059