Table 3.
Inter- and intra observer agreement of the GGNs' volumes on ultra-low dose CT image reconstructed with each algorithm.
| Nodule size | Type of agreement | Type of agreement | Mean differencea (limits of agreement, %) | ICCb |
|---|---|---|---|---|
| 10 mm | Inter observer | HIR | 5.8 (-7.1, 18.7) | 0.0307 |
| MBIR | 2.1 (-12.3, 16.6) | 0.2999 | ||
| DLR | 1.8 (-4.9, 8.5) | 0.6354 | ||
| intra observer | HIR | 2.5 (-13.9, 18.9) | 0.1834 | |
| MBIR | 2.4 (-10.2, 14.9) | 0.4436 | ||
| DLR | −0.6 (-9.0, 7.8) | 0.5143 | ||
| 6 mm | Inter observer | HIR | 9.8 (-38.7, 58.3) | 0.2763 |
| MBIR | 6.8 (-27.2, 40.7) | 0.1241 | ||
| DLR | 3.0 (-18.3, 24.3) | 0.5417 | ||
| intra observer | HIR | 2.3 (-31.9, 36.5) | 0.6049 | |
| MBIR | 1.5 (-25.6, 29.0) | 0.3935 | ||
| DLR | 0.2 (-17.2, 17.5) | 0.7967 |
HIR, Hybrid iterative reconstruction; MBIR, Model-based iterative reconstruction; DLR, deep learning reconstruction; ICC, intraclass confidence coefficient.
a
Bland-Altman analysis.
b
random single measures with an absolute agreement condition (ICC [1,1], [2, 1]).