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Early survival prediction in non-small cell lung cancer from PET/CT images using an intra-tumor partitioning method
Stockholms universitet, Naturvetenskapliga fakulteten, Fysikum. Karolinska Institutet, Sweden.ORCID-id: 0000-0002-7101-240X
Vise andre og tillknytning
2019 (engelsk)Inngår i: Physica medica (Testo stampato), ISSN 1120-1797, E-ISSN 1724-191X, Vol. 60, s. 58-65Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Purpose

To explore prognostic and predictive values of a novel quantitative feature set describing intra-tumor heterogeneity in patients with lung cancer treated with concurrent and sequential chemoradiotherapy.

Methods

Longitudinal PET-CT images of 30 patients with non-small cell lung cancer were analysed. To describe tumor cell heterogeneity, the tumors were partitioned into one to ten concentric regions depending on their sizes, and, for each region, the change in average intensity between the two scans was calculated for PET and CT images separately to form the proposed feature set. To validate the prognostic value of the proposed method, radiomics analysis was performed and a combination of the proposed novel feature set and the classic radiomic features was evaluated. A feature selection algorithm was utilized to identify the optimal features, and a linear support vector machine was trained for the task of overall survival prediction in terms of area under the receiver operating characteristic curve (AUROC).

Results

The proposed novel feature set was found to be prognostic and even outperformed the radiomics approach with a significant difference (AUROCSALoP = 0.90 vs. AUROCradiomic = 0.71) when feature selection was not employed, whereas with feature selection, a combination of the novel feature set and radiomics led to the highest prognostic values.

Conclusion

A novel feature set designed for capturing intra-tumor heterogeneity was introduced. Judging by their prognostic power, the proposed features have a promising potential for early survival prediction.

sted, utgiver, år, opplag, sider
2019. Vol. 60, s. 58-65
Emneord [en]
Survival prediction, Treatment response, Radiomics, Tumor heterogeneity
HSV kategori
Identifikatorer
URN: urn:nbn:se:su:diva-167967DOI: 10.1016/j.ejmp.2019.03.024ISI: 000464560200009OAI: oai:DiVA.org:su-167967DiVA, id: diva2:1304277
Tilgjengelig fra: 2019-04-11 Laget: 2019-04-11 Sist oppdatert: 2019-05-28bibliografisk kontrollert

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Astaraki, MehdiWang, ChunliangToma-Dasu, IulianaLazzeroni, MartaSmedby, Örjan
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