ABSTRACT
Positioning for antero-posterior thumb projection. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315382210/8ca82e7c-bd07-4171-b4f5-ebaded57b5b3/content/fig2_82a.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
The patient is seated facing away from the table with the arm extended backwards and medially rotated at the shoulder.
The hand may be slightly rotated to ensure that the second, third and fourth metacarpals are not superimposed on the base of the first metacarpal.
The patient leans forwards, lowering the shoulder so that the first metacarpal is parallel to the table top.
The image receptor is placed under the wrist and thumb and oriented to the long axis of the metacarpal.
