无线电技术
磁共振成像
医学
Lasso(编程语言)
放射外科
一致性
放射治疗
人工智能
计算机科学
放射科
内科学
万维网
作者
Gianluca Carloni,Cristina Garibaldi,Giulia Marvaso,Stefania Volpe,Mattia Zaffaroni,Matteo Pepa,Lars Johannes Isaksson,Francesca Colombo,Stefano Durante,Giuliana Lo Presti,Sara Raimondi,Lorenzo Spaggiari,Filippo de Marinis,Gaia Piperno,S. Vigorito,Sara Gandini,Marta Cremonesi,Vincenzo Positano,Barbara Alicja Jereczek‐Fossa
标识
DOI:10.1016/j.radonc.2022.11.013
摘要
Radiomics enables the mining of quantitative features from medical images. The influence of the radiomic feature extraction software on the final performance of models is still a poorly understood topic. This study aimed to investigate the ability of radiomic features extracted by two different radiomic platforms to predict clinical outcomes in patients treated with radiosurgery for brain metastases from non-small cell lung cancer. We developed models integrating pre-treatment magnetic resonance imaging (MRI)-derived radiomic features and clinical data.Pre-radiotherapy gadolinium enhanced axial T1-weighted MRI scans were used. MRI images were re-sampled, intensity-shifted, and histogram-matched before radiomic extraction by means of two different platforms (PyRadiomics and SOPHiA Radiomics). We adopted LASSO Cox regression models for multivariable analyses by creating radiomic, clinical, and combined models using three survival clinical endpoints (local control, distant progression, and overall survival). The statistical analysis was repeated 50 times with different random seeds and the median concordance index was used as performance metric of the models.We analysed 276 metastases from 148 patients. The use of the two platforms resulted in differences in both the quality and the number of extractable features. That led to mismatches in terms of end-to-end performance, statistical significance of radiomic scores, and clinical covariates found significant in combined models.This study shed new light on how extracting radiomic features from the same images using two different platforms could yield several discrepancies. That may lead to acute consequences on drawing conclusions, comparing results across the literature, and translating radiomics into clinical practice.
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