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Thumb Positioning
Term | Definition |
---|---|
What are the three routine projections for the thumb series? | AP projection, Lateral projection, and PA Oblique projection |
What projection of thumb may be substituted if the patient is unable to maintain the required position for the AP projection? | PA projection |
What is the disadvantage of using the PA projection? | Increased OID and magnification |
What carpal should all thumb images include in the collimated field? | Trapezium |
AP Projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at end of table with arm internally rotated Center IR to MCP joint CR perpendicular to MCP joint Shield is required |
Lateral Projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at end of table with the relaxed hand placed on the IR Center IR to MCP joint CR perpendicular to MCP joint Shield is required |
PA Oblique Projection Collimation? patient positioning? IR placement? Central Ray? Shield | 8x10 Seated at end of table with the palm of the hand resting on the IR Center IR to MCP joint CR perpendicular to MCP joint Shield is required |