Table 1 Patient and scanner characteristics.
From: Assessment of image quality and impact of deep learning-based software in non-contrast head CT scans
Centre | p-Value (Site I vs. II, Site I vs. III, Site II vs. IIII) | ||||
|---|---|---|---|---|---|
Site I | Site II | Site III | |||
Patient cohort | N | 48 | 54 | 50 | |
Male/Female (Percent) | 20/28 (42%/58%) | 28/26 (52%/48%) | 27/23 (54%/46%) | 0.41/0.31/0.98 | |
Median Age (IQR) | 63 (50; 77) | 82 (68; 88) | 73 (59; 83) | < 0.001/0.01/0.01 | |
Scan parameters | Reference mAs (A)/ Reference mAs (B) | 300/300 | 273 | – | – |
Median mAs (A) (IQR)/ Median mAs (B) (IQR) | 213 (202; 224)/ 226 (215; 239) | 214 (204; 221) | 230 (230; 230) | – | |
Median scan length in cm (IQR) | 16.6 (15.8; 17.1) | 16.6 (16.0; 17.5) | 16.9 (15.8; 17.6) | 0.59/0.30/0.60 | |
Radiation dose | Median CTDIvol (IQR) (mGy) | 33 (31; 34) | 30 (29; 31) | 48 (48; 52) | < 0.001/ < 0.001/ < 0.001 |
Median DLP (IQR) (mGy∙cm) | 528 (501; 583) | 498 (469; 532) | 847 (798; 847) | < 0.001/ < 0.001/0.001 | |
Median Effective Dose (mSv) (IQR)* | 1.06 (1.00; 1.17) | 1.00 (0.94; 1.06) | 1.69 (1.60; 1.69) | < 0.001/ < 0.001/0.001 | |
