Published in:
01-01-2020 | Computed Tomography | Original Article
CT-based radiomics for prediction of histologic subtype and metastatic disease in primary malignant lung neoplasms
Authors:
José Raniery Ferreira-Junior, Marcel Koenigkam-Santos, Ariane Priscilla Magalhães Tenório, Matheus Calil Faleiros, Federico Enrique Garcia Cipriano, Alexandre Todorovic Fabro, Janne Näppi, Hiroyuki Yoshida, Paulo Mazzoncini de Azevedo-Marques
Published in:
International Journal of Computer Assisted Radiology and Surgery
|
Issue 1/2020
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Abstract
Purpose
As some of the most important factors for treatment decision of lung cancer (which is the deadliest neoplasm) are staging and histology, this work aimed to associate quantitative contrast-enhanced computed tomography (CT) features from malignant lung tumors with distant and nodal metastases (according to clinical TNM staging) and histopathology (according to biopsy and surgical resection) using radiomics assessment.
Methods
A local cohort of 85 patients were retrospectively (2010–2017) analyzed after approval by the institutional research review board. CT images acquired with the same protocol were semiautomatically segmented by a volumetric segmentation method. Tumors were characterized by quantitative CT features of shape, first-order, second-order, and higher-order textures. Statistical and machine learning analyses assessed the features individually and combined with clinical data.
Results
Univariate and multivariate analyses identified 40, 2003, and 45 quantitative features associated with distant metastasis, nodal metastasis, and histopathology (adenocarcinoma and squamous cell carcinoma), respectively. A machine learning model yielded the highest areas under the receiver operating characteristic curves of 0.92, 0.84, and 0.88 to predict the same previous patterns.
Conclusion
Several radiomic features (including wavelet energies, information measures of correlation and maximum probability from co-occurrence matrix, busyness from neighborhood intensity-difference matrix, directionalities from Tamura’s texture, and fractal dimension estimation) significantly associated with distant metastasis, nodal metastasis, and histology were discovered in this work, presenting great potential as imaging biomarkers for pathological diagnosis and target therapy decision.