Rad-104: Humerus Procedures

when can AP elbow of distal humerus in partial position be used

in place of AP elbow projection when patient cannot fully extend joint

what does AP elbow of distal humerus in partial flexion require

distal humerus and proximal forearm be imaged separately to create one full image of joint cavity

AP humerus positioning

place top border of IR about 1.5: (33.8 cm) above humeral head

slightly abduct humerus from body and supinate hand

coronal plane passing through humeral epicondyles placed parallel to IR plane

CR of AP humerus

perpendicular to midportion of humerus and centered to IR

collimation of AP humerus

includes entire humerus, along with shoulder and elbow joint

AP humerus criteria

elbow and shoulder joints

maximal visibility of epicondyles without rotation

humeral head and greater tubercule in profile

outline of the lesser tubercule see between humeral head and greater tubercule

beam divergence partially closes elbow joint

little variation in density of proximal and distal humerus

lateral humerus positioning

place top border of IR 1.5” (3.8cm) above humeral head

internally rotate humerus, flex elbow 90 degrees and rest palm of hand on hip

coronal plane passing through epicondyles should be perpendicular to plane of IR

CR of lateral humerus

perpendicular to midportion of humerus and centered to IR

collimation of lateral humerus

includes entire humerus including both adjacent joints

lateral humerus criteria

elbow and shoulder joints

superimposed epicondyles

lesser tubercule in profile

greater tubercule superimposed over humeral head

beam divergence partially closes elbow joint

little variation in density of proximal and distal humerus