Knee/Patella - Special Views - Video Lesson

In this view, we will be demonstrating the tangential need set a gas view. The tangential knee set a gas view should be performed with a patient lying supine or prone on the radiographic table. A forty inch source to image distance with a patient holding the IR tube angulation to match deflection of the patient's knee. This is the tangental view of the patella. The patient is going to assist with this She is actually holding the IR. I have placed a fifteen to twenty degree angle on the X-ray tube. So at first, I put in the ninety degrees in add it the fifteen to twenty. The central ray is at the knee joint. We have a height collimation of four by four with the right marker in the field of view. I have double checked my SID with this angle