Table 5 CT scan characteristics for abdomen CT among 156 patients in 7 selected facilities
Facility | A (n = 35) | B (n = 26) | C (n = 9) | D (n = 26) | E (n = 25) | F (n = 15) | G (n = 20) | Total (N = 156) |
|---|---|---|---|---|---|---|---|---|
kVp n (%) | ||||||||
110 | 6 (17.1) | 6 (3.8) | ||||||
120 | 20 (100.0) | 20 (12.8) | ||||||
130 | 29 (82.9) | 26 (100) | 9 (100.0) | 26 (100.0) | 25 (100.0) | 15 (100.0) | 130 (83.3) | |
Total mAs | 3281 (2507, 4285)** | 5685 (4271, 9659)** | 12,173.6 (7493.7) | 7721.5 (6208, 10,186)** | 10,774 (9327, 13,647)** | 3205 (2117, 4213)** | - | 6115.5 (3619, 9869)** |
Exam mAs | 104 (82, 132)** | 94.3 (12.0) | 92.9 (28.8) | 45 (14.9) | 88 (73, 112) | 83 (60, 111)** | 315 (258, 315)** | 98 (67, 118)** |
Reference mAs | 148 (4.1) | 65.7 (21.3) | 122 (4.4) | 87.1 (10.5) | 114.2 (8.2) | 121.3 (3.5) | - | 116 (80.5, 140)** |
Scan length (mm) | 421.5 (374.5, 444)** | 643.5 (612, 705)** | 371.5 (252.5, 400)** | 360.2 (100.4) | 759 (51.5) | 347.2 (78.9) | 60.9 (22.9, 115.1)** | 412.5 (320, 633)** |
Scan time (s) | 12.3 (11.1, 13.8)** | 41.2 (3.8) | 28.7 (16.5) | 34.1 (10.3) | 22.7 (9.4) | 16.9 (9.3) | 11.9 (1.5) | 16.2 (12.2, 34)** |
Slice thickness (mm) n (%) | 26 (16.7) | |||||||
1 | 26 (100.0) | 26 (16.7) | ||||||
3 | 26 (100.0) | 20 (12.8) | ||||||
3.75 | 20 (100.0) | 84 (53.9) | ||||||
5 | 35 (100.0) | 9 (100.0) | 25 (100.0) | 15 (100.0) | 26 (16.7) | |||
Image quality n (%) | ||||||||
3 | 2 (7.7) | 2 (22.2) | 10 (38.5) | 1 (7.1) | 15 (9,7) | |||
4 | 22 (84.6) | 7 (77.8) | 10 (38.5) | 2 (8.0) | 3 (21.4) | 2 (10.0) | 46 (29.7) | |
5 | 35 (100.0) | 2 (7.7) | 6 (23.0) | 23 (92.0) | 10 (71.4) | 18 (90.0) | 94 (60.6) | |