Sunday, December 21, 2008

Praning5254 LEWIS METHOD: TANGENTIAL POSITION of SESAMOID

Film size:
• 8X10
Patients position:
• Prone position
Position of part:
• Ankle of the affected side is elevated
Central ray:
• Perpendicular and tangential to 2nd metatarsophalengeal joint
Structure shown:
• Tangential position of the metatarsal heads and sesamoids is shown
Evaluation criteria:
• Sesamoid heads should projected of any portion of 1st metatarsal
• Metatarsal heads should be clearly seen

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