Table 4 Calibration accuracy for the H 1 and H 2 units
Target/filter and kV combination | Within-unit calibration | Cross-unit calibration | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
H1 | H2 | H1images calibrated with H2data | H2images calibrated with H1data | ||||||||||
120mAs | 160mAsr | 200mAs | 120mAs | 160mAsr | 200mAs | 120mAs | 160mAsr | 200mAs | 120mAs | 160mAsr | 200mAs | ||
W/Rh | |||||||||||||
kV = | 26 | 50.6(0.44) | 51.9(0.47) | 54.0(0.47) | 48.8(0.48) | 51.6(0.44) | 52.9(0.40) | 55.7(0.44) | 57.1(0.47) | 59.2(0.47) | 43.6(0.48) | 46.5(0.44) | 47.8(0.40) |
27 | 50.2(0.44) | 51.8(0.46) | 53.5(0.44) | 49.2(0.43) | 50.6(0.43) | 52.3(0.42) | 54.2(0.44) | 55.9(0.46) | 57.6(0.44) | 45.2(0.43) | 46.5(0.43) | 48.2(0.42) | |
28 | 50.8(0.46) | 52.3(0.46) | 53.5(0.46) | 50.8(0.37) | 51.8(0.33) | 53.2(0.35) | 55.5(0.47) | 57.0(0.47) | 58.2(0.46) | 46.2(0.36) | 47.2(0.33) | 48.5(0.35) | |
29 | 50.3(0.47) | 51.4(0.50) | 52.7(0.48) | 51.2(0.31) | 52.6(0.30) | 53.3(0.31) | 55.9(0.47) | 57.0(0.50) | 58.3(0.49) | 45.7(0.31) | 47.1(0.29) | 47.8(0.31) | |
30 | 50.9(0.61) | 52.1(0.63) | 53.0(0.62) | 51.5(0.39) | 52.5(0.40) | 53.1(0.42) | 55.8(0.62) | 57.0(0.65) | 57.9(0.63) | 46.7(0.38) | 47.8(0.39) | 48.3(0.41) | |
W/Ag | |||||||||||||
kV = | 27 | 51.0(0.77) | 52.4(0.78) | 52.9(0.80) | 52.3(0.43) | 53.3(0.44) | 54.0(0.44) | 50.9(0.80) | 52.4(0.81) | 52.9(0.83) | 52.3(0.42) | 53.3(0.42) | 53.9(0.43) |
28 | 51.1(0.90) | 52.1(0.92) | 52.8(0.93) | 52.2(0.39) | 53.5(0.41) | 52.5(0.43) | 50.1(0.92) | 51.1(0.94) | 51.8(0.95) | 53.1(0.38) | 54.4(0.39) | 53.5(0.42) | |
29 | 50.8(0.94) | 52.1(0.96) | 52.2(0.97) | 51.5(0.40) | 52.8(0.41) | 52.9(0.40) | 49.5(0.99) | 50.7(0.98) | 50.9(0.99) | 52.8(0.39) | 54.1(0.40) | 54.2(0.39) | |
30 | 51.5(0.98) | 52.5(0.99) | 52.6(1.00) | 52.5(0.44) | 53.0(0.44) | 53.4(0.45) | 48.9(0.99) | 50.0(1.00) | 50.0(1.01) | 55.0(0.43) | 55.6(0.44) | 55.9(0.45) | |
31 | 55.9(0.91) | 56.7(0.90) | 56.8(0.93) | 52.3(0.51) | 53.2(0.51) | 53.6(0.52) | 48.3(0.94) | 49.1(0.93) | 49.3(0.97) | 59.7(0.49) | 60.6(0.49) | 61.0(0.50) | |
32 | 54.0(0.97) | 54.8(0.97) | 55.9(1.00) | 54.0(0.64) | 54.6(0.64) | 55.8(0.65) | 51.2(0.98) | 52.1(0.97) | 53.2(1.00) | 56.7(0.63) | 57.3(0.64) | 58.5(0.65) | |