What is the difference between an oblique knee x-ray and a sunrise and tunnel x-ray?
There are two different position for doing an oblique knee (which is basically fully extending the leg and rotating it 45 degrees) You can either do an internal oblique in which you would role the leg inwards 45 degrees this will show the proximal tib/fib joint. You can also do an external oblique which you would roll the leg 45 outwards. This will show the tib and fib superimposed. A sunrise xray (also called a skyline, or patella view) will show you the patella completely free of all other bones (the femur, and tibia). For this view the patient would flex their knee and the central xray would be angled to match up with the patellor femoral joint space. This view is best used to demostrate a vertical fracture of the patella. This will also demonstate if there is a subluxation or dislocation of the patella. If it is suspected that a patient had the horizontal patella fracture the sunride view should not be done as flexing the knee maybe dislocat the pieces of the patella. The tunnel vi
