Subtalar Joint - AP Axial Oblique - Medial Rotation (Isherwood)

Radiographic Positioning

Adult

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Name of projection	Subtalar Joint - AP Axial Oblique - Medial Rotation (Isherwood)
Area Covered	Distal tibia and fibula, entire talus and calcaneum, proximal tarsal bones
Pathology shown	Middle subtalar articulation, open sinus tarsi
Radiographic Anatomy
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 to a point 2cm distal and 2cm anterior to the lateral malleolus 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 in a semi seated position on table and turn with their weight resting on the flexed hip and thigh of the unaffected side Patient's leg fully extended Lower leg in AP position, dorsiflex foot Place IR under the ankle Internally rotate leg 60° CR to a point 2cm distal and 2cm anterior to the lateral malleolus 10° cephalad
Critique PACEMAN	Positioning Area Covered Collimation Exposure
Special Notes