Effect of slice thickness on reproducibility of radiomic features in urinary stones
10.3969/j.issn.1002-1671.2024.10.019
- VernacularTitle:层厚对泌尿系结石影像组学特征可重复性的影响
- Author:
Lei TANG
1
;
Shixia WANG
;
Zhenlu YANG
;
Wuchao LI
;
Xianchun ZENG
Author Information
1. 贵州省人民医院医学影像科,贵州 贵阳 550002
- Keywords:
urinary stone;
radiomics;
feature extraction;
slice thickness;
computed tomography
- From:
Journal of Practical Radiology
2024;40(10):1663-1666
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the effect of CT slice thickness on the reproducibility of radiomic features in urinary stones.Methods A retrospective analysis was performed on 30 cases of stones diagnosed by urinary CT.Thin-slice(1 mm)images were reconstructed into two groups of images with thicknesses of 2 mm and 5 mm.Two radiologists conducted manual segmentation independently and then extracted features.The reproducibility of the radiomic features was calculated using the concordance correlation coefficient(CCC).Results Under different slice thickness conditions by the same radiologist,the average CCC of all groups was less than 0.85(P＜0.05).For radiologist A,the proportion of stone features with CCC＜0.85 were 50.13％,79.91％,and 82.38％in the 1 mm vs 2 mm group,2 mm vs 5 mm group,and 1 mm vs 5 mm group,respectively.Corresponding values for radiologist B were 44.55％,79.47％and 82.32％,respectively.Among the seven categories of radiomic features,the morphological features with CCC＜0.85 was 100％in the 1 mm vs 5 mm group.Conclusion CT slice thickness significantly affected the reproducibility of radiomic features in urinary stones,with the greatest effect observed in morphological features.Thin-slice imaging demonstrated more stable reproducibility of stone characteristics.
