Transcript Chapter 6

Chapter 6
Calcaneus
Ankle
Calcaneus
• Os Calcis
• Articulates with
– ___________(Subtalar joint)
– __________
• 3 articulating surfaces (facets)
– ____________
– Middle
– Anterior
Calcaneus
• __________________
– Medial process
• __________________
– Trochlea Process
– Lateral process
• __________________
– Forms Sinus Tarsi
• _________________
– Posterioinferior
Calcaneous Imaging
Os Calcis
Routine
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Plantardorsal
Lateral
40” SID
65 kV
Plantardorsal
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Pt Supine
__________________
Angle ____________________
Center at base of ____________and exit
at the level of lateral malleolus
• Collimate to calcaneus
Lateral Calcaneus
• Position patient for __________ projection
• ___________________
• Use a pillow under knee if needed to
ensure no tilt
• Center ___________to medial malleolus
• Collimate to include calcaneous
Ankle
• Consists of:
– Distal ______________
– Talus
• Synovial _____________
Distal Tibia/Fibula
• __________________
– Extended portion of distal Fibula
• _________________
– Extended portion of distal Tibia
Distal Tibia
• Anterior ______________
– Process off anterior distal tibia
• ______________
– Flattened portion lateral distal aspect
Ankle
• ___________
– Space formed by inferior Tib/Fib and where
superior talus fits.
• _____________
– The “ceiling” of the mortise.
Imaging the Ankle
Routine
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AP
Lateral
Internal / External Oblique
60 kV
40” SID
AP Ankle
• Dorsiflex foot. Ankle to form __________
• No Foot rotation
• Center Mid ankle _______________
• Collimate to skin
Lateral Ankle
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Position patient for _________ projection
_________ aspect of foot against cassette
Dorsiflex foot to ___________
Use a pillow under knee if needed to
ensure no tilt
• Center at _______________
• Collimate to include _______________
Internal Rotation
• Place Ankle in AP and rotate ________
• Center ___________________
Ankle Mortise
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Place ankle __________
Rotate ________________
CR between _____________
Collimate to the skin laterally
External Rotation
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Place Ankle in AP
Rotate _______________
Center between _____________
Collimate to the skin laterally