Ankle
AP IR Size: 8x10 TT SID: 40'' Page #'s: 1:279,88	Positioning:   • Pt. Supine with Leg Extended   • Foot dorsiflexed 90°	CR Entrance & Angle:   • _|_ between malleoli   • Collimation:   •	Eval Criteria:   • Open Tibiotalar Joint and centered   • Normal overlap of tibiofibular joint with anterior tubercle slightly SI over the fibula   • No SI of medial talomalleolar joint
AP Oblique MR IR Size: 8x10 TT SID: 40'' Page #'s: 1:283,92&94	Positioning:   • Pt. Supine w/ Leg Extended, Foot 90°   • For tibiofibular joint in profile - Leg & Foot 45° Medially   • For Mortise Joint (99% of the time) - Leg and foot 15°-20° Medially	CR Entrance & Angle:   • _|_ between malleoli, For Mortise Joint - Malleoli Parallel   • Collimation:   • Best to Determine:   • Mortise Joint or Tibiofibular Joint	Eval Criteria:   • For mortise - Complete open mortise joint with tibiotalar joint space in profile   • For 45° - Some overlap of tibia & fibula over the talus   • Open tibiofibular joint
Lateral (ML) IR Size: 8x10 TT SID: 40'' Page #'s: 1:280,90	Positioning:   • Pt lateral position on affected   • Foot dorsiflexed 90°   • (Usually Knee should be off the table, use sponge)	CR Entrance & Angle:   • _|_ on medial malleolus   • Collimation:   • Include 5th MT tuberosity in case of Jones Fx Respiration:   •	Eval Criteria:   • Tibiotalar joint well seen and centered with SI of medial & lateral talar domes   • Fibula over posterior half of tibia   • 5th MT seen to check for Jones fx
Stress IR Size: 8x10 TT SID: 40'' Page #'s: 1:287,96	Positioning:   • Same as AP & AP oblique   • Uses Extreme Inversion & Eversion   • If ligament is torn a widening of the joint space is demonstrated one of injury   • Radiologist performs procedure	CR Entrance & Angle:   •   • Collimation:   • Best to Determine:   • Ligamentous Tears	Eval Criteria: