Table 2 Contrast-noise ratio (CNR) for different fiducial markers
From: Fiducial markers visibility and artefacts in prostate cancer radiotherapy multi-modality imaging
Planar image | RP | CIVCO | GA | GA (B) | PM |
|---|---|---|---|---|---|
EPID integrated 6MV 200MU/min ET 3379 s | |||||
 @0o | 8.36 | 15.48 | 2.61 | 1.67 | nv |
 @90o | 9.73 | 4.93 | nv | 3.18 | nv |
6MV 6MV MsE 3 MU | |||||
 @0o | 6.04 | 8.33 | nv | nv | nv |
 @90o | 4.44 | 5.60 | nv | nv | nv |
2.5MV 2.5MV MsE 1.5 MU | |||||
 @0o | 8.56 | 7.39 | 4.24 | 5.94 | nv |
 @90o | 4.15 | 4.51 | 2.63 | 3.59 | nv |
kV 0o: kVp 85,134 mA ET 112 s 90o: kVp 110,102 mA ET 147 s | |||||
 @0o | 2.64 | 2.09 | 4.82 | 6.40 | 9.38 |
 @90o | 6.08 | 6.40 | 4.62 | 3.95 | 2.35 |
ExacTrac 212o: kVp 100,400 mA ET 100 s 149o: kVp 100,400 mA ET 100 s | |||||
 Tube1 | 2.78 | 3.42 | 2.57 | 2.57 | 3.17 |
Tube2 | 2.60 | 2.47 | 3.21 | 3.90 | 2.97 |