Table 4 Objective image quality: subgroup analysis by body size (main pulmonary artery).
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 | |||
Intravascular attenuation [HU] | ||||||||
BMI < 25 (n = 85) | 451 (356–568) | 451 (356–569) | 450 (355–569) | 450 (355–569) | 451 (357–568) | 451 (356–568) | 451 (356–568) | < 0.05 |
BMI 25.0–29.9 (n = 73) | 388 (323–481) | 388 (324–480) | 388 (324–480) | 389 (324–480) | 389 (325–480) | 390 (326–480) | 389 (326–481) | < 0.05 |
BMI ≥ 30 (n = 54) | 333 (267–440) | 334 (267–440) | 334 (267–440) | 334 (267–439) | 332 (267–439) | 332 (267–439) | 332 (267–438) | < 0.05 |
Intravascular image noise [HU] | ||||||||
BMI < 25 (n = 85) | 50 (47–55) | 43 (39–47) | 35 (33–39) | 29 (26–33) | 35 (30–39) | 27 (23–30) | 18 (15–21) | < 0.05 |
BMI 25.0–29.9 (n = 73) | 48 (45–51) | 41 (38–44) | 33 (31–37) | 27 (25–31) | 31 (28–35) | 24 (21–27) | 16 (14–18) | < 0.05 |
BMI ≥ 30 (n = 54) | 52 (46–55) | 44 (39–47) | 35 (32–40) | 28 (24–34) | 36 (30–39) | 27 (23–30) | 17 (15–20) | < 0.05 |
Signal-to-noise ratio | ||||||||
BMI < 25 (n = 85) | 9 (7–11) | 10 (8–13) | 12 (10–15) | 15 (13–18) | 13 (11–15) | 17 (14–19) | 24 (21–27) | < 0.05 |
BMI 25.0–29.9 (n = 73) | 8 (7–10) | 10 (8–12) | 11 (10–14) | 14 (12–17) | 13 (10–15) | 17 (14–19) | 25 (20–29) | < 0.05 |
BMI ≥ 30 (n = 54) | 6 (5–9) | 8 (6–10) | 9 (7–12) | 12 (10–15) | 10 (8–13) | 13 (10–16) | 19 (14–23) | < 0.05 |
Contrast-to-noise ratio | ||||||||
BMI < 25 (n = 85) | 8 (6–10) | 9 (7–12) | 11 (8–14) | 13 (11–17) | 12 (9–14) | 15 (12–17) | 21 (18–24) | < 0.05 |
BMI 25.0–29.9 (n = 73) | 7 (5–9) | 8 (7–10) | 10 (8–12) | 12 (11–15) | 11 (8–13) | 15 (11–17) | 21 (17–25) | < 0.05 |
BMI ≥ 30 (n = 54) | 5 (4–8) | 6 (5–9) | 8 (6–11) | 10 (7–13) | 8 (7–11) | 11 (8–14) | 17 (11–20) | < 0.05 |
