Table 5 PTV margin for each institution, determined assuming that \(\:{d}_{\text{i}\text{I}\text{C}-\text{r}\text{I}\text{C}}\) is zero owing to implementation of rigorous QA procedures and that intra-fraction error caused by treatment couch rotation is zero owing to implementation of a real-time positional monitoring system.
Setup error (reference) | Ong et al. | Zhang et al. | ||||||
|---|---|---|---|---|---|---|---|---|
Manufacturer | Institution | Years of operation | X | Y | Z | X | Y | Z |
Varian | A | 10 | 1.0 | 0.9 | 0.9 | 1.4 | 1.1 | 1.9 |
B | 7 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
C | 7 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
D | 5 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
E | 5 | 1.0 | 0.9 | 0.9 | 1.4 | 1.1 | 1.9 | |
F | 6 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
G | 7 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
H | 9 | 1.0 | 0.9 | 1.0 | 1.5 | 1.1 | 2.0 | |
I | 7 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
J | 6 | 1.0 | 0.9 | 0.9 | 1.4 | 1.1 | 1.9 | |
K | 1 | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | |
Minimum | 1.0 | 0.9 | 0.9 | 1.4 | 1.1 | 1.9 | ||
Maximum | 1.0 | 0.9 | 1.0 | 1.5 | 1.1 | 2.0 | ||
Average | 1.0 | 0.9 | 1.0 | 1.4 | 1.1 | 2.0 | ||
Standard deviation | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | ||
Elekta | L | 6 | 1.3 | 1.3 | 1.3 | 1.7 | 1.4 | 2.2 |
M | 5 | 1.5 | 1.5 | 1.5 | 1.8 | 1.6 | 2.3 | |
N | 5 | 1.2 | 1.1 | 1.2 | 1.6 | 1.3 | 2.1 | |
O | 12 | 1.3 | 1.3 | 1.3 | 1.7 | 1.4 | 2.1 | |
P | 7 | 1.3 | 1.2 | 1.3 | 1.6 | 1.4 | 2.1 | |
Q | 12 | 1.3 | 1.3 | 1.3 | 1.7 | 1.4 | 2.2 | |
R | 11 | 1.4 | 1.3 | 1.3 | 1.7 | 1.4 | 2.2 | |
S | 4 | 1.1 | 1.0 | 1.0 | 1.5 | 1.2 | 2.0 | |
T | 9 | 1.3 | 1.3 | 1.3 | 1.7 | 1.4 | 2.1 | |
U | 7 | 1.3 | 1.3 | 1.3 | 1.7 | 1.4 | 2.1 | |
V | 0 | 1.2 | 1.1 | 1.2 | 1.6 | 1.3 | 2.1 | |
Minimum | 1.1 | 1.0 | 1.0 | 1.5 | 1.2 | 2.0 | ||
Maximum | 1.5 | 1.5 | 1.5 | 1.8 | 1.6 | 2.3 | ||
Average | 1.3 | 1.2 | 1.3 | 1.7 | 1.4 | 2.1 | ||
Standard deviation | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | ||
