Table 3.
Image Quality and Lesion Detection
| SD-IR | LD-IR | LD-DLIR | p-value | |
|---|---|---|---|---|
| Image quality | ||||
| Sharpness (ĸ value) | 0.31 | 0.24 | 0.68 | N.A. |
| Reader 1 | 4.0 ± 0.2 (4.0–5.0) | 3.2 ± 0.4a (3.0–4.0) | 4.1 ± 0.3 (4.0–5.0) | <0.001 |
| Reader 2 | 4.1 ± 0.3 (4.0–5.0) | 3.4 ± 0.5a (3.0–4.0) | 4.1 ± 0.3 (4.0–5.0) | <0.001 |
| Image noise (ĸ value) | 0.41 | 0.66 | 0.61 | N.A. |
| Reader 1 | 3.9 ± 0.3 (3.0–4.0) | 3.0 ± 0.2a (2.0–3.0) | 4.1 ± 0.4b (3.0–5.0) | <0.001 |
| Reader 2 | 3.9 ± 0.3 (3.0–5.0) | 2.9 ± 0.3a (2.0–4.0) | 4.2 ± 0.5b (3.0–5.0) | <0.001 |
| Diagnostic acceptability (ĸ value) | 0.65 | 0.59 | 0.42 | N.A. |
| Reader 1 | 4.0 ± 0.2 (3.0–4.0) | 3.1 ± 0.3a (2.0–4.0) | 4.1 ± 0.3 (3.0–5.0) | <0.001 |
| Reader 2 | 4.0 ± 0.3 (3.0–5.0) | 3.1 ± 0.4a (2.0–4.0) | 4.0 ± 0.3 (3.0–5.0) | <0.001 |
| Lesion detection | ||||
| Thyroid nodule | ||||
| Reader 1 | 100% (22/22) | 100% (22/22) | 100% (22/22) | 1.00 |
| Reader 2 | 91% (20/22) | 86% (19/22) | 86% (19/22) | 1.00 |
| Breast mass | ||||
| Reader 1 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Reader 2 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Lymphadenopathy | ||||
| Reader 1 | 100% (4/4) | 100% (4/4) | 100% (4/4) | 1.00 |
| Reader 2 | 100% (4/4) | 100% (4/4) | 100% (4/4) | 1.00 |
| Liver cyst | ||||
| Reader 1 | 100% (34/34) | 97% (33/34) | 97% (33/34) | 1.00 |
| Reader 2 | 91% (31/34) | 91% (31/34) | 91% (31/34) | 1.00 |
| Hepatic hemangioma | ||||
| Reader 1 | 100% (8/8) | 100% (8/8) | 100% (8/8) | 1.00 |
| Reader 2 | 88% (7/8) | 88% (7/8) | 88% (7/8) | 1.00 |
| Liver metastasis | ||||
| Reader 1 | 100% (3/3) | 100% (3/3) | 100% (3/3) | 1.00 |
| Reader 2 | 100% (3/3) | 100% (3/3) | 100% (3/3) | 1.00 |
| Pancreatic cyst | ||||
| Reader 1 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Reader 2 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Peritoneal dissemination | ||||
| Reader 1 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Reader 2 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Adrenal nodule | ||||
| Reader 1 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Reader 2 | 100% (2/2) | 100% (2/2) | 100% (2/2) | 1.00 |
| Renal cyst | ||||
| Reader 1 | 95% (35/37) | 89% (33/37) | 95% (35/37) | 0.73 |
| Reader 2 | 100% (37/37) | 97% (36/37) | 97% (36/37) | 1.00 |
| Uterine mass | ||||
| Reader 1 | 86% (6/7) | 86% (6/7) | 86% (6/7) | 1.00 |
| Reader 2 | 86% (6/7) | 86% (6/7) | 86% (6/7) | 1.00 |
| Ovarian mass | ||||
| Reader 1 | 100% (4/4) | 100% (4/4) | 100% (4/4) | 1.00 |
| Reader 2 | 100% (4/4) | 100% (4/4) | 100% (4/4) | 1.00 |
N.A., not applicable. LD-DLIR, low-dose with deep learning image reconstruction.LD-IR, low-dose with adaptive statistical iteration reconstruction Veo; SD-IR, standard-dose with hybrid-iterative reconstruction technique.
Data are means ± 1 standard deviation.
a
Value was significantly lower (p < 0.017) than those with SD-IR and LD-DLIR.
b
Value was significantly greater (p < 0.017) than those with SD-IR.