ABSTRACT
Positioning for ‘skyline’ (supero-inferior) patellar 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_50a.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
The patient sits on the X-ray table, with the affected knee flexed over the side.
Ideally, the leg should be flexed to 45 degrees; however, some orthopaedic doctors may request skyline projections with a specified amount of flexion, for example 20 degrees, depending on the clinical situation and information required. Too much flexion reduces the retropatellar spacing. Sitting the patient on a cushion helps to achieve the optimum position.
The receptor is supported horizontally on a stool at the level of the inferior tibial tuberosity border.
This method describes the use of CR equipment. However, this could be adapted to be used with digital radiography equipment, using the erect detector placed in a horizontal position with the patient sitting on a chair with the knee overhanging the detector, as described above.
