A lot of patients are given their X-rays and they take them home and they have their report available perhaps, but won’t necessarily know the anatomy or be able to interpret the different planes of the tissues through which the X-rays are passing.
Indeed, X-rays have certain limitations. One has to do a lot of interpretation to understand exactly what you are seeing. Therefore, one radiologist may give a slightly different report from another, depending upon his or her skill at interpreting minor subtleties in the shadows and highlights.
When the doctor orders your X-rays, he will know that a single view like this A-P view has limitations and he will invariably order at least two views taken from different viewpoints. In knee orthopaedics, most surgeons would order a minimum of three, and often four, views - all taken at slightly different angles so that you can interpret and put together the picture into the larger whole.