Name of projection | Subtalar Joint - AP Axial Oblique - Lateral Rotation (Isherwood) |
Area Covered | Distal tibia and fibula, entire talus and calcaneum, proximal tarsal bones |
Pathology shown | Posterior subtalar articulation, subtalar joint in profile |
Radiographic Anatomy |
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IR Size & Orientation | 18 x 24cm Landscape |
Film / Screen Combination | Detail (CR and DR as recommended by manufacturer) |
Bucky / Grid | No |
Filter | No |
Exposure | 60 kVp 3.2 mAs |
FFD / SID | 100cm |
Central Ray | CR directed to a point 2cm distal to the medial malleolus with an angle of 10° cephalad |
Collimation | Four sides of collimation collimate to ankle jont and calcaneum |
Markers | Distal and lateral Marker orientation AP |
Shielding | Gonadal (check your department's policy guidelines) |
Respiration | Not applicable |
Positioning | - Patient semi supine / seated
- Patient's leg fully extended on the table
- Place IR under the ankle
- Rotate lower leg laterally 60°
- Foot dorsiflexed to 90°
- CR directed to a point 2cm distal to the medial malleolus
- CR angled 10° cephalad
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Critique
| Positioning Area Covered Collimation Exposure
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Special Notes |
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