Table 1 Scanners and scanning parameters used to acquire volumetric images of pelvic phantom, all CBCT were acquires using dynamic gain fluoro kV mode
From: Fiducial markers visibility and artefacts in prostate cancer radiotherapy multi-modality imaging
CT | Manufacturer | Model | Scan Type | Slice thickness (mm) | Pixel spacing (mm) | Focal spot (mm) | kVp | Tube current (mA) | Exposure (mAs) | FoV (mm×mm) |  |  |
1 | GE | Optima CT580 | Helical | 0.63, 1.25, 2.5 | 0.98 | 0.7 | 120 | 200 | 26 | 500 × 500 |  |  |
2 | GE | Optima CT580 | Helical | 2.5 | 0.98 | 1.2 | 120 | 400 | 106 | 500 × 500 |  |  |
3 | GE | Discovery CT590 RT | Helical | 2.5 | 0.98 | 0.7 | 120 | 200 | 53 | 500 × 500 |  |  |
4 | GE | Discovery CT590 RT | Helical | 2.5 | 0.98 | 1.2 | 120 | 400 | 106 | 500 × 500 |  |  |
CBCT | Manufacturer | Model | Scan Type (Pelvis) | Slice thickness (mm) | Pixel spacing (mm) | Focal spot (mm) | kVp | Tube current (mA) | Exposure (mAs) | FoV (mm×mm) | kV Filter | Bowtie |
5 | Varian | TrueBeam | Varian | 2 | 0.91 | 1 | 125 | 80 | 1074 | 464.9 × 464.9 | Titanium | Half fan |
6 | Varian | TrueBeam | Medium | 2 | 0.91 | 1 | 125 | 63 | 845 | 464.9 × 464.9 | Titanium | Half fan |
7 | Varian | TrueBeam | Obese | 2 | 0.91 | 1 | 140 | 99 | 1683 | 464.9 × 464.9 | Titanium | Half fan |
MRI | Manufacturer | Model | Sequence | Slice thickness (mm) | Slice gap (mm) | TR/TE (ms) | ETL | Flip angle (o) | Acquisition matrix | FoV (mm×mm) | Receiver bandwidth (Hz/px) | Number of averages |
8 | SIEMENS | MAGNETOM Aera 1.5 T | 2D T2 TSE | 3.5 | 0.35 | 4800/94 | 23 | 90/160 | 288 × 384 | 220 × 220 | 200 | 3 |
9 | SIEMENS | MAGNETOM Aera 1.5 T | 2D T1 TSE | 6 | 1.2 | 542/24 | 3 | 90/140 | 336 × 448 | 359 × 359 | 185 | 2 |
10 | SIEMENS | MAGNETOM Aera 1.5 T | 3D GR | 2 | – | 7.46/4.77 | – | 10 | 307 × 384 | 420 × 420 | 325 | 2 |
11 | GE | Optima MR450w 1.5 T | 2D TSE | 6 | 1 | 556/13.1 | 4 | 90/160 | 224 × 512 | 360 × 360 | 122 | 0.5 |
12 | GE | Optima MR450w 1.5 T | 2D SSTSE | 2 | 1 | 567/98.7 | – | 90/180 | 224 × 288 | 200 × 200 | 122 | 0.55 |
13 | GE | Optima MR450w 1.5 T | 2D TSE | 3.5 | 0.5 | 6748/106.7 | 24 | 90/160 | 224 × 384 | 250 × 250 | 122 | 2 |