Reproducibility and Location-stability of Radiomic Features Derived from Cone-beam Computed Tomography: a Phantom Study

Overview

Journal Dentomaxillofac Radiol

Publisher Oxford University Press

Date 2023 Sep 4

PMID 37664997

Authors

Xian He

Zhi Chen

Yutao Gao

Wanjing Wang

Meng You

Affiliations

Soon will be listed here.

Abstract

Objectives: This study aims to determine the reproducibility and location-stability of cone-beam computed tomography (CBCT) radiomic features.

Methods: Centrifugal tubes with six concentrations of KHPO solutions (50, 100, 200, 400, 600, and 800 mg ml) were imaged within a customized phantom. For each concentration, images were captured twice as test and retest sets. Totally, 69 radiomic features were extracted by LIFEx. The reproducibility was assessed between the test and retest sets. We used the concordance correlation coefficient (CCC) to screen qualified features and then compared the differences in the numbers of them under 24 series (four locations groups * six concentrations). The location-stability was assessed using the Kruskal-Wallis test under different concentration sets; likewise, the numbers of qualified features under six test sets were analyzed.

Results: There were 20 and 23 qualified features in the reproducibility and location-stability experiments, respectively. In the reproducibility experiment, the performance of the peripheral groups and high-concentration sets was significantly better than the center groups and low-concentration sets. The effect of concentration on the location-stability of features was not monotonic, and the number of qualified features in the low-concentration sets was greater than that in the high-concentration sets. No features were qualified in both experiments.

Conclusions: The density and location of the target object can affect the number of reproducible radiomic features, and its density can also affect the number of location-stable radiomic features. The problem of feature reliability should be treated cautiously in radiomic research on CBCT.

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