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Proceedings Paper

Applying a radiomics approach to predict prognosis of lung cancer patients
Author(s): Nastaran Emaminejad; Shiju Yan; Yunzhi Wang; Wei Qian; Yubao Guan; Bin Zheng
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Paper Abstract

Radiomics is an emerging technology to decode tumor phenotype based on quantitative analysis of image features computed from radiographic images. In this study, we applied Radiomics concept to investigate the association among the CT image features of lung tumors, which are either quantitatively computed or subjectively rated by radiologists, and two genomic biomarkers namely, protein expression of the excision repair cross-complementing 1 (ERCC1) genes and a regulatory subunit of ribonucleotide reductase (RRM1), in predicting disease-free survival (DFS) of lung cancer patients after surgery. An image dataset involving 94 patients was used. Among them, 20 had cancer recurrence within 3 years, while 74 patients remained DFS. After tumor segmentation, 35 image features were computed from CT images. Using the Weka data mining software package, we selected 10 non-redundant image features. Applying a SMOTE algorithm to generate synthetic data to balance case numbers in two DFS (“yes” and “no”) groups and a leave-one-case-out training/testing method, we optimized and compared a number of machine learning classifiers using (1) quantitative image (QI) features, (2) subjective rated (SR) features, and (3) genomic biomarkers (GB). Data analyses showed relatively lower correlation among the QI, SR and GB prediction results (with Pearson correlation coefficients < 0.5 including between ERCC1 and RRM1 biomarkers). By using area under ROC curve as an assessment index, the QI, SR and GB based classifiers yielded AUC = 0.89±0.04, 0.73±0.06 and 0.76±0.07, respectively, which showed that all three types of features had prediction power (AUC>0.5). Among them, using QI yielded the highest performance.

Paper Details

Date Published: 24 March 2016
PDF: 7 pages
Proc. SPIE 9785, Medical Imaging 2016: Computer-Aided Diagnosis, 97851E (24 March 2016); doi: 10.1117/12.2214672
Show Author Affiliations
Nastaran Emaminejad, The Univ. of Oklahoma (United States)
Shiju Yan, Univ. of Shanghai for Science and Technology (China)
Yunzhi Wang, The Univ. of Oklahoma (United States)
Wei Qian, The Univ. of Texas at El Paso (United States)
Yubao Guan, Guangzhou Medical Univ. (China)
Bin Zheng, The Univ. of Oklahoma (United States)

Published in SPIE Proceedings Vol. 9785:
Medical Imaging 2016: Computer-Aided Diagnosis
Georgia D. Tourassi; Samuel G. Armato III, Editor(s)

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