Table 8 Summary of CT dose analysis by protocol.
CTAC (n = 116) | CAC (n = 621) | p-value | ||
|---|---|---|---|---|
Sample size | 116 (102 in one-day, 14 in two-day) | 621 (574 in one-day, 47 in two-day) | ||
Scan purpose | Attenuation correction/localisation | Diagnostic/localisation and attenuation correction | ||
DLP | Mean ± SD | 58.5 ± 30.1 | 72.3 ± 10.3 | < 0.001a |
Min | 22.1 | 38.8 | ||
Max | 174.3 | 126.8 | ||
AD | 53.1 | 67.8 | ||
DRL | 78.6 | 77.5 | ||
CTDIvol | Mean ± SD | 3.1 ± 1.6 | 4.9 ± 0.2 | < 0.001a |
Min | 1.4 | 4.8 | ||
Max | 7.4 | 7.0 | ||
AD | 2.8 | 4.8 | ||
DRL | 4.3 | 4.8 | ||
Scan Length | Mean | 156.0 ± 21.0 | 145.4 ± 21.1 | < 0.001a |
Min | 99.0 | 73.0 | ||
Max | 267.0 | 217.5 |
