Hand/Thumb/Fingers RAD 1 Positioning Flashcards
What SID is used for hand positioning?
40”
What IR is used for the hand?
10 x 12
Where is the CR located for PA Hand and PA oblique?
Perpendicular to 3rd MCP joint
What structures are seen in PA Hand projection?
- PA projection of entire hand
- 1’ distal forearm
- Open IP and MCP joints
- Palm flat against IR
- No rotation
What structures are seen in 45 degree PA oblique hand?
- Slight overlap of the metacarpal bases and heads
- Seperation of the 2nd and 3rd metacarpals
- Open IP and MCP joints
Where is the 45 degree PA Hand oblique rotated?
Lateral
What structures are seen in a lateromedial hand projection?
- Superimposed metacarpals
- Proximal portions of phalanges superimposed
- Superimposition of distal radius and ulna
- all digits fully extended/fanned
Where is the CR for a lateromedial hand projection?
Perpendicular to 2nd MCP joint
What sign does the lateromedial hand make?
ok sign
What is another name for AP oblique hand projection?
Ball-catchers aka Norgaard method
Where is the CR located for Ball-catchers?
Perpendicular in the middle of both hands at the level of MCP
What are structures seen in Ball-Catchers position?
- Both hands shown from the carpal area to the tips of the digits
- Metacarpal hands and proximal phalangeal bases free of superimposition
- Aids in the diagnosis of rheumatoid arthritis
What does MCP stand for?
Metacarpal phalangeal joint
Where is the CR located for PA projection of fingers?
Perpendicular to PIP joint of affected digit
What structures are seen in PA projection of finger?
- Open IP & MCP joint spaces without bone overlap
- Entire digit from fingertip to distal portion of metacarpal
- Soft tissue and bony trabeculation
Where is the CR located for 45 degree medial oblique position of 2nd finger?
Perpendicular to PIP joint
What structures are seen in a 45 degree medial oblique position of 2nd finger?
- Entire digit projected at a 45 degree angle, including the distal portion of the adjoining metacarpal
- Medial oblique done to decrease OID
- Soft tissue and bony trabeculation
- No superimposition of adjacent digits over the proximal phalanx or MCP joint
Where is the CR located for mediolateral projection of 2nd digit?
Perpendicular to PIP joint
What structures are seen for mediolateral projection of 2nd digit
- No rotation of phalanges
- Open IP spaces
- No obstruction of the proximal phalanx or MCP joint by adjacent digits
- Mediolateral for the 2nd digit done to reduce OID
Where is the CR located for 45 degree lateral oblique position of 3rd-5th digits?
Perpendicular to PIP joint
What structures are seen for a 45 degree lateral oblique position of 3rd-5th digits?
- Entire digit projected at a 45 degree angle, including the distal portion of the adjoining metacarpal
- Soft tissue and bony trabeculation
- No superimposition of the adjacent digits over the proximal phalanx or MCP joint
What is the CR located for a lateromedial projection for 3rd-5th digits?
Perpendicular to PIP joint
What structures are seen for a lateromedial projection for 3rd-5th digits?
- No rotation of phalanges
- Open IP spaces
- No obstruction of the proximal phalanx or MCP joint by adjacent digits
- Soft tissue and boney trabeculation
Where is the CR located for PA oblique projection of thumb?
Perpendicular to MCP joint
What structures are seen in a PA oblique projection of thumb?
- Visualization from the distal tip of the thumb to the trapezium
- Open IP and MCP joint spaces
- soft tissue and boney trabeculation
Where is the CR located for the AP projection of thumb?
Perpendicular to MCP joint
What are the structures seen for a AP projection of thumb?
- Visualization from the distal tip of the thumb to the trapezium
- Open IP and MCP joint spaces
- soft tissue and boney trabeculation
Where is the CR located for Mediolateral projection of thumb?
Perpendicular to MCP joint
What are the structures seen for a Mediolateral projection of thumb?
- Visualization from the distal tip of the thumb to the trapezium
- Open IP and MCP joint spaces
- Visualization of anterior or posterior displacement or foreign body
What is the tip of the finger called?
Tuft
