Calcaneus

Question 1

Calcaneus X-Ray Series

Answer 1

Normal Series

• Axial or AP
• Lateral

Question 2

Axial Calcaneus

Answer 2

• Cassette - 18x24, vertical
• Positioning - fencer stance, facing away from the tube. Foot is placed on the cassette with knee slightly flexed
• Stabilization - standing comfortably, hold chair if needed
• Shielding - Gonad shielding/lead apron
• Instructions - ensure malleoli are superimposed
• SID - 100cm
• Central Ray - mid achilles tendon at insertion
• Tube Tilt - 30-40 from horizontal
• Collimation - A-P, include soft tissues of the calcaneus. S-I, include all the calcaneus
• kV - Children 60 and adults 70
• Marker Placement - lateral to the anatomy in PA orientation

Question 3

AP Calcaneus

Answer 3

• Cassette - 18x24, vertical
• Positioning - pt is sitting on the floor, leg extended, posterior of lower leg and heel on cassette with foot at 90 dorsiflexed
• Stabilization - sit comfortably
• Shielding - Gonad shielding/lead apron
• Instructions - ensure foot is dorsiflexed
• SID - 100cm
• Central Ray - base of 3rd metatarsal
• Tube Tilt - 40 cephalad
• Collimation - A-P, include soft tissues of the calcaneus. S-I, include all the calcaneus
• kV - Children 60 and adults 70
• Marker Placement - lateral to the anatomy

Question 4

Lateral Calcaneus

Answer 4

• Cassette - 18x24, vertical
• Positioning - pt is lying or sitting with lateral side of foot on cassette and dorsiflexed
• Stabilization - sit comfortably and can use sponge to stablize
• Shielding - Gonad shielding/lead apron
• Instructions - ensure patella is perpendicular to the cassette
• SID - 100cm
• Central Ray - 2cm inferior and posterior to medial malleolus
• Tube Tilt - 0
• Collimation - A-P, include soft tissues of the calcaneus. S-I, include all the calcaneus
• kV - Children 60 and adults 70
• Marker Placement - anterior to the anatomy