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Fingers Hand & Wrist

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Created by: mandy91lou

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Radiographic Positioning Quizzes

Question	Answer
Distal Carpals	Trapezium, Trapezoid, Capitate, Hamate
Proximal Carpals	Pisiform, Triquetrum, Lunate, Scaphoid/Navicular
Anatomical Snuff Box	Overlies the Scaphoid bone **Most frequently fractured carpal bone
AP Thumb	Position:Supinated Projection:Ap CR:MCP Joint **Must include the Trapezium
PA Oblique Thumb	Position:Hand pronated, Thumb abduct Projection:Pa Oblique CR:MCP Joint
Lateral Thumb	Position:Lateral Projection:Mediolateral CR:MCP Joint
PA Fingers 2-5	Position:Prone Projection:PA CR:PIP Joint
PA Oblique Fingers 2-5	Position:External Rotation Projection:PA Oblique CR:PIP Joint
Lateral Fingers 2-5	Position:Lateral Projection:Mediolateral (2-3), Lateromedial (4-5) CR:PIP Joint
PA Fingers 2-5 Images	Concavity of phalangeal shafts Equal amount of soft tissue on both sides *Fingernail is centered over distal phalanx
Lateral Fingers 2-5 Images	Concave anterior aspect of the phalangeal shaft Open joints No overlap of the other digits Anatomy: head, body, & base
Why keep digits parallel to film?	1.Keep joint spaces open 2.Prevent foreshortening
PA Hand	Position:Prone Projection:PA CR:3rd MCP Joint
PA Oblique Hand	Position:External Rotation Projection:PA Oblique CR:3rd MCP Joint
Fan Lateral Hand	Position:Fan Lateral Projection:Lateromedial CR:2nd MCP Joint
Fan Lateral Image	Superimposed metacarpals *See individual phalanges without superimposition
Lateral in Extension	Position:Lateral in Extension Projection:Lateromedial CR:2nd MCP Joint
Lateral in Extension Image	Superimposed digits, metacarpals, distal forearm *Thumb abducted
Why use a lateral in extension?	1.To localized foreign body 2.Show soft tissue 3.Show metacarpal fx displacements
PA Wrist	Position:Prone Projection:Pa CR:Midcarpals
PA Oblique Wrist	Position:Lateral Rotation from prone Projection:PA Oblique CR:Midcarpals
Lateral Wrist	Position:Lateral Projection:Lateromedial CR:Wrist Joint
AP Oblique Wrist	Position:Medial Rotation from supine Projection:AP Oblique CR:Midcarpals
Why do a PA Oblique vs. AP Oblique Wrist?	PA Oblique demo scaphoid & trapezoid *carpals on lateral aspect AP Oblique shows the pisiform free from superimposition
Ulnar Deviation Wrist	Position:Prone with Ulnar deviation Projection:Pa CR:Scaphoid
Radial Deviation Wrist	Position:Prone with Radial deviation Projection:Pa CR:Midcarpals
Ulnar Deviation vs Radial Deviation	Ulnar Deviation: carpals on lateral aspect shows scaphoid with no foreshortening & adjacent joints open Radial Deviation: carpals on medial aspect Shows the pisiform
Stecher Method	Position:Stecher Method Projection:PA Axial CR:Perpendicular or angled 20 degrees toward elbow & enters scaphoid
Why the Stecher Method?	shows the scaphoid without foreshortening
Gaynor Hart Method	Position:Gaynor Hart Method Projection:Tangential CR:25-30 degrees to long axis of hand, 1" distal to base of 3rd MC