Table 3 Objective image quality.
From: Improved image quality in CT pulmonary angiography using deep learning-based image reconstruction
FBP | ASiR-V | DLIR | p-value | |||||
|---|---|---|---|---|---|---|---|---|
30% | 60% | 90% | Low | Medium | High | |||
Attenuation paraspinal muscle [HU] | 55 (46–62) | 55 (47–61) | 54 (47–61) | 54 (47–60) | 54 (48–60) | 53 (48–59) | 53 (49–58) | < 0.05 |
Main pulmonary artery | ||||||||
Intravascular attenuation [HU] | 399 (312–494) | 399 (311–494) | 399 (311–494) | 398 (311–493) | 399 (312–495) | 400 (312–495) | 400 (312–495) | < 0.05 |
Intravascular image noise [HU] | 50 (46–54) | 42 (39–46) | 35 (32–39) | 28 (25–32) | 34 (30–37) | 26 (23–29) | 17 (15–20) | < 0.05 |
Signal-to-Noise ratio | 8 (6–10) | 9 (8–12) | 11 (9–14) | 14 (12–17) | 12 (10–15) | 16 (13–18) | 23 (19–27) | < 0.05 |
Contrast-to-Noise ratio | 7 (5–9) | 8 (6–11) | 10 (8–12) | 12 (10–15) | 11 (8–13) | 14 (11–17) | 20 (16–24) | < 0.05 |
Segmental pulmonary artery | ||||||||
Intravascular attenuation [HU] | 374 (307–461) | 374 (305–461) | 373 (303–461) | 372 (301–461) | 371 (306–461) | 371 (304–461) | 370 (301–461) | < 0.05 |
Intravascular image noise [HU] | 38 (33–45) | 31 (26–37) | 25 (20–30) | 18 (14–24) | 25 (21–30) | 20 (17–24) | 14 (12–17) | < 0.05 |
Signal-to-Noise ratio | 10 (8–13) | 12 (9–16) | 15 (12–20) | 20 (16–27) | 15 (12–18) | 19 (15–24) | 25 (21–33) | < 0.05 |
Contrast-to-Noise ratio | 9 (6–11) | 11 (8–14) | 13 (10–17) | 17 (13–23) | 13 (10–16) | 16 (13–21) | 22 (17–28) | < 0.05 |
