ABSTRACT
Positioning for lateral knee (basic) 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_47a.jpg" xmlns:xlink="https://www.w3.org/1999/xlink"/>
The patient lies on the side to be examined, with the knee flexed at 45 degrees (i.e.135 degrees from back of calf to back of the thigh) or 90 degrees.
The second limb is brought forward in front of the one being examined and supported on a sandbag.
A sandbag is placed under the ankle of the affected side to bring the long axis of the tibia parallel to the image receptor. Dorsiflexion of the foot helps maintain this position.
The position of the limb is now adjusted to ensure that the femoral condyles are superimposed vertically.
The medial tibial condyle is placed level with the centre of the receptor.
