Correlating different imaging modalities can be hugely interesting and value, not just in diagnosis, but understanding the radiographic concepts of our profession.

Plain films have limitations -- one being that they can demonstrate only 4 natural densities, fat being one of these, being marginally more lucent than soft tissue.

This is well demonstated on the chest x-ray delineating the soft tissue (muscular) left heart border from the adjacent epicardial fat.

Internationally, there is a growing number of patients with larger body habitus. As clinical imagers, this can be a challenge, limitating our radiological magicbox!