Ankle

Question 1

Ankle

Answer 1

Normal Series

• AP
• Lateral
• Mortise

Question 2

AP Ankle

Answer 2

• Cassette - 24x30, horizontal, divided in half
• Positioning - pt is sitting or laying with leg extended and foot at 90 dorsiflexion
• Stabilization - pt is lying or seated comfortably, sponge can be used to stablize.
• Shielding - Gonad shielding
• Instructions - Do not force dorsiflexion if not possible
• SID - 100cm
• Central Ray - Perpendicular to image plate and centred between malleoli
• Tube Tilt - 0
• Collimation - A-P, all the soft tissues of the foot. S-I, include the proximal metatarsals and distal tibia and fibula
• kV - Children 60 and adults 70
• Marker Placement - lateral to the anatomy

Question 3

Mortise Ankle

Answer 3

• Cassette - 24x30, horizontal, divided in half
• Positioning - pt is sitting or laying with leg extended and foot dorsiflexed and leg is internally rotated 15-20 until intermalleolar line is parallel to IR
• Stabilization - pt is lying or seated comfortably, sponge can be used to stablize.
• Shielding - Gonad shielding
• Instructions - Do not force dorsiflexion if not possible
• SID - 100cm
• Central Ray - Perpendicular to image plate and centred between malleoli
• Tube Tilt - 0
• Collimation - M-L, all the soft tissues of the ankle and proximal metatarsals. S-I, include the proximal metatarsals and distal tibia and fibula
• kV - Children 60 and adults 70
• Marker Placement - lateral to the anatomy

Question 4

Lateral Ankle

Answer 4

• Cassette - 24x30, vertical or horizontal
• Positioning - sit or lay comfortably on the floor with foot dorsiflexed and lateral side of the foot against the cassette so that malleoli are superimposed.
• Stabilization - seated or lying comfortably
• Shielding - Gonad shielding/lead apron
• Instructions - ensure malleoli are superimposed
• SID - 100cm
• Central Ray - perpendicular to the image plate, at the level of the ankle joint
• Tube Tilt - 0
• Collimation - A-P, include soft tissues of the ankle and proximal metatarsals. S-I, include the soft tissues of the heel and distal tibia and fibula
• kV - Children 60 and adults 70
• Marker Placement - anterior to the anatomy