week 7- wrist and forearm
the PA axial stecher method require either angulation of the IR or CR. how many degrees is this angulation?
20 degrees
which positioning method will ensure the radius and ulna remain parallel with each other when performing the PA wrist projection?
flex elbow 90 degrees
what positioning method will reduce OID of the carpals regions?
flexing digits
the PA wrist projection with radial deviation is performed to provide
improved visualization of the medial sided carpals and associated joints spaces
if there is anterior dislocation of a carpal bone, which projection will best demonstrate this injury?
lateral
which specialized projection will demonstrate the scaphoid bone with minimal superimposition and foreshortening?
PA axial stecher method
which non-essential projection will demonstrate the pisiform free of superimposition?
AP oblique with medial rotation
PA wrist with ulnar deviation is performed to demonstrate
scaphoid with reduced foreshortening
what is the evaluation criteria for lateral wrist radiograph?
-bony trabecular detail and soft tissue visualized -side marker place free of area of interest -radial and ulnar styloid process superimposed
what is the evaluation criteria for the PA wrist radiograph?
-open radioulnar joint space -bony trabecular detail and soft tissue visualize -distal radius and proximal 1/2 of metacarpals included
what is the degree of rotation of the forearm when positioning for the PA oblique wrist projection?
45
what is the centering point for the PA wrist radiograph?
mid carpal area
which is the centering point for the lateral wrist projection?
mid carpal area
which method will ensure the wrist region will be placed parallel to the IR and no foreshortening of the distal radius and ulna will be present?
placing entire forearm parallel to IR
which method will eliminate any foreshortening of the radius and ulna when performing the AP forearm projection?
placing forearm parallel to IR
which hand position will result in crossing of the radius and ulna?
pronated, palm down
what is the position of the hand for AP forearm projection?
supinated
which projection best demonstrated the carpal canal?
tangential gaynor-hart method
which carpal bone is free of superimposition on the PA oblique wrist radiograph?
trapezium
