Table 1.
The details of scanning parameters for each case
| CT | CBCT | MRI | |
| Case 1 | GE BrightSpeed
a
140 kV, 39 mAs slice thickness 2.5 mm supine position |
N/A | SIEMENS Novus (1.5T)
c
Axial/sag/cor d position T1 (TR: 410 ms; TE: 10 ms), T2 (TR: 5300 ms; TE: 100 ms) voxel size: 0.5273 × 0.5273 mm slice thickness: 5 mm |
| Case 2 | N/A | 3DX CBCT
b
80 kV, 45 mAs FOV: 4 × 4 cm voxel size: 0.125 × 0.125 mm |
SIEMENS Sonata (1.5T) axial/osag/ocor position T1 (TR: 350 ms; TE: 15 ms), T2 (TR: 2790 ms; TE: 103 ms); PD (TR: 2790 ms; TE: 13 ms) voxel size: 0.3125 × 0.3125 mm Slice thickness: 4/3 mm(for axial) |
| Case 3 | N/A | 3D Accuitomo 170 CBCT 90 kV, 45 mAs FOV: 6 × 6 cm voxel size: 0.125 × 0.125 mm. |
SIEMENS Trio Tim (3.0 T) axial/osag/ocor position T1 (TR: 250 ms; TE: 2.7 ms), T2 (TR: 4120 ms; TE: 99 ms); PD (TR: 4120 ms; TE: 20 ms) voxel size: 0.2344 × 0.2344 mm/0.5469 × 0.5469 mm Slice thickness: 3 mm |
| Case 4 | N/A | 3D Accuitomo 170 CBCT 90 kV, 45 mAs FOV: 6 × 6 cm voxel size: 0.125 × 0.125 mm. |
GE OPTIMA MR360 (1.5T) axial/osag/ocor position T1 (TR: 338–494 ms; TE: 10–11 ms), T2 (TR: 2000 ms; TE: 106 ms); PD fs (TR: 1993 ms; TE: 32 ms); PD (TR: 1771 ms; TE: 47 ms) voxel size: 0.3906 × 0.3906 mm Slice thickness: 2.5/3 mm (for axial) |
| Case 5 | N/A | 3D Accuitomo 170 CBCT 90 kV, 45 mAs FOV: 6 × 6 cm voxel size: 0.125 × 0.125 mm. |
GE Medical system Signa HDxt (1.5T) axial/osag/ocor position T1 (TR: 733 ms; TE: 10 ms), T2 (TR: 4383 ms; TE: 102 ms); T2 fs(TR: 3350 ms; TE: 84 ms); PD (TR: 1950 ms; TE: 22 ms) voxel size: 0.2344 × 0.2344 mm Slice thickness: 2/2.6 mm (for osag) |
CBCT, cone beam CT; FOV, field of view; PD, proton density; TE, echo time; TR, repetition time.
a
CT: GE Medical system BrightSpeed CT scanner (General Electric Company, Connecticut, CT);
b
CBCT: 3DX, 3D Accuitomo 170 (J. Morita MFG. Corp., Irvine, CA);
c
MRI: SIEMENS Novus, SIEMENS Sonata, SIEMENS Trio Tim (Siemens AG, Munich, Germany); GE Medical system OPTIMA MR360, GE Medical system Signa HDxt (General Electric Company, Connecticut, CT);
d
sag: sagittal; cor: coronal; osag: oblique sagittal; ocor: oblique coronal; fs: fat suppression.