Hand and Fingers Flashcards
what is the special technique used to image the 5th finger laterally called
trident
what is the CP for fingers
Perpendicular to the PIP joint of the finger
what is the collimation for fingers
fingertip to distal 1/3 metacarpal
include 2 fingers either side
what is the SID for hand and finger views
100-110cm
what is the kVp for hand and finger views
50-60kVp
what is the mAs for hand and finger views
1.5-2.5mAs
do you use grids for for hand and finger views
no grid
what are the 3 types of projections for fingers
lateral
oblique
AP/DP
what are the 6 projections for hands
lateral AP PA PA Oblique fan lateral bilateral ball catchers
what is the CP for hand views
perpendicular to MCP joint
for AP hand views which way does the palm face
palm up
for lateral and PA hand views which way does the palm face
palm down
what is the collimation for hands
fingers to distal 1/3 of radius and ulnar
what is the CP for the PA oblique hand view
perpendicular to 3rd MCP
what is the CP for the fan lateral hand view
perpendicular to 2nd MCP
what is the CP for the bilateral ball catcher hand view
perpendicular to and between the hands at MCP level
what is the image critique for hands and fingers patient positioning
in terms of elbow, hand and forearm
elbow flexed
hand flat
forearm on table
what is the image critique for true lateral hands patient positioning
in terms of 3 things that need to be superimposed
distal radius and ulna are superimposed
metacarpals superimposed
phalanges of fingers superimposed
what is the image critique for true lateral fingers patient positioning
concave anterior surface of shaft of phalanges
what is the image critique for fan lateral hand patient positioning
in terms of 2 things that need to be superimposed and what the fingers should be
distal radius and ulna superimposed
metacarpals superimposed
fingers lateral but separated
what is the area of interest for finger projections
all of finger to include distal metacarpal
what is the area of interest for thumb projections
all of thumb to include metacarpal and trapezium
what is the area of interest for wrist projections
distal radius/ulna to mid metacarpals
what are the 3 signs of good exposure
optimal density/brightness and contrast with no motion
soft tissue margins visible
clear sharp bony trabeculae
