Research Article
Diagnostic Value of CT Arthrography for Evaluation of Osteochondral Lesions at the Ankle
Table 1
Exemplary 3 T MR imaging parameters.
| | Sequence | 2D IM-w TSE | 2D T2-w TSE | 2D IM-w TSE | 2D T1-w TSE |
| | Additional features | FS, BLADE | | FS, BLADE | DRIVE | | Plane | Sagittal | Transverse | Coronal | Coronal | | Echo time (TE; ms) | 46 | 77 | 47 | 13 | | Repetition time (TR; ms) | 4500 | 5360 | 4500 | 1000 | | Field of view (FOV; mm) | 140 | 120 | 140 | 140 | | Slice thickness (mm) | 3 | 3 | 3 | 3 | | In-plane resolution (mm2) | 0.44 × 0.44 | 0.38 × 0.38 | 0.36 × 0.36 | 0.36 × 0.36 | | Flip angle (°) | 90° | 90° | 90° | 90° | | Number of slices | 22 | 25 | 24 | 22 | | Receiver bandwidth (Hz/ pixel) | 182 | 147 | 181 | 171 | | Echo train length | 9 | 15 | 9 | 3 | | Phase encoding direction | AP | RL | RL | RL | | Distance factor (%) | 10 | 20 | 10 | 10 | | Acquisition time (min) | 5 : 08 | 3 : 57 | 5 : 48 | 4 : 04 |
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FOV: field of view; w: weighted; TSE: turbo spin echo; IM: intermediate; fs: fat saturated; BLADE: motion correction with radial blades; DRIVE pulse: driven equilibrium pulse.
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