Thumb Flashcards
Thumb
X-Ray Series
Normal Series
- AP
- Lateral
- Lateral Oblique
AP Thumb
Cassette - 18x24 horizontal divided into thirds
Positioning - pt sitting with no knees under table, hand on 1/3 the cassette and lead sheet on the rest.
internally rotate arm on thumbnail is against the cassette.
If they cannot rotate then do a lateral with a sponge to incrase OID
Stabilization - elbow on the table with arm as flat as possibl
Shielding - Gonad shielding/lead apron
Instructions - forearm pronated with palm flat on image, fingers separated
SID - 100cm
Central Ray - centred on 1st MCP joint
Tube Tilt - 0
Collimation - M-L, all soft tissue of the thumb. S-I, must include all of thumb and trapizum lengthwise
Children 50 and adults 60
Marker Placement - lateral to the anatomy
Lateral Thumb
Cassette - 18x24 horizontal divided into thirds
Positioning - pt sitting with no knees under table, hand on 1/3 the cassette and lead sheet on the rest.
make a loose fist and rotate thumb until perpendicular to image plate
Stabilization - elbow on the table with arm as flat as possible
Shielding - Gonad shielding/lead apron
Instructions - thumb to be parallel
SID - 100cm
Central Ray - centred on 1st MCP joint
Tube Tilt - 0
Collimation - M-L, all soft tissue of the thumb. S-I, must include all of thumb and trapizum lengthwise
Children 50 and adults 60
Marker Placement - anterior to the anatomy
Oblique Thumb
Cassette - 18x24 horizontal divided into thirds
Positioning - pt sitting with no knees under table, hand on 1/3 the cassette and lead sheet on the rest.
lie hand flat and elbow is flexed
Stabilization - elbow on the table with arm as flat as possible
Shielding - Gonad shielding/lead apron
Instructions - thumb to be parallel
SID - 100cm
Central Ray - centred on 1st MCP joint
Tube Tilt - 0
Collimation - M-L, all soft tissue of the thumb. S-I, must include all of thumb and trapizum lengthwise
Children 50 and adults 60
Marker Placement - anterior to the anatomy
