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Table 1 Shear wave elasticity values, and intra- and interrater intraclass correlation coefficient (ICC) agreement and coefficient of variation (CV) for EMean (mean elasticity) in region of interest (ROI) with the two methods (total nodular ROI with tracing total nodule and focal nodular ROI with 3 mm circle) by two raters

From: Shear wave elasticity by tracing total nodule showed high reproducibility and concordance with fibrosis in thyroid cancer

Method of ROIEMean (kPa), mean ± SD (min-max)ICC (95% CI)CV (%)
Read 1Read 2
Total nodular ROI
 Intrarater assay (within image)
  Rater 125.3 ± 10.0 (12.0–49.6)24.7 ± 9.0 (12.1–40.1)0.975 (0.983–0.990)1.7
  Rater 224.3 ± 11.7 (9.6–58.7)24.3 ± 11.9 (9.2–59.9)0.999 (0.997–1.000)1.4
Intrarater assay (different image)
 Rater 124.8 ± 9.0 (12.0–40.0)24.6 ± 9.4 (9.3–41.7)0.959 (0.895–0.984)7.6
 Rater 224.3 ± 11.7 (9.6–58.7)26.0 ± 13.1 (10.3–60.8)0.976 (0.933–0.991)7.5
 Interrater assay25.3 ± 10.0 (12.0–49.6)24.3 ± 11.7 (9.6–58.7)0.863 (0.653–0.946)14.9
Focal nodular ROI
 Intrarater assay (within image)
  Rater 134.0 ± 17.2 (14.4–86.3)39.6 ± 22.9 (16.3–115.2)0.934 (0.842–0.973)13.4
  Rater 245.0 ± 36.8 (12.4–179.9)36.6 ± 23.4 (10.4–111.8)0.866 (0.693–0.945)16.9
Intrarater assay (different image)
 Rater 134.0 ± 17.2 (14.4–86.3)33.6 ± 11.9 (11.2–53.7)0.894 (0.730–0.958)12.3
 Rater 245.0 ± 36.8 (12.4–179.9)37.1 ± 19.1 (11.1–93.1)0.734 (0.347–0.894)19.8
 Interrater assay34.0 ± 17.2 (14.4–86.3)45.0 ± 36.8 (12.4–179.9)0.783 (0.443–0.915)19.0