Which view on plain films is preferred to identify spondylolysis?

The preferred view to identify spondylolysis on plain films is the oblique view. This position allows for a clearer visualization of the pars interarticularis, the specific region of the vertebrae where spondylolysis often occurs. In this view, the anatomical structures are positioned such that the presence of any fractures or defects in the pars can be seen more clearly compared to other views.

The oblique orientation reveals the bony architecture of the vertebrae at an angle that highlights the critical area of interest, making it easier to diagnose conditions like spondylolysis. Other views, such as anterior, posterior, or lateral, do not provide the same focused perspective on the pars interarticularis, potentially leading to missed diagnoses or false negatives. Therefore, using the oblique view is essential for accurate identification of spondylolysis in clinical practice.