Chest X-ray is a very basic investigation in the evaluation of lung diseases. However, chest X-ray interpretation needs a stepwise approach to identify the anatomical components of the X-ray as well as the technical aspects such as centralization, exposure, and the inspiratory-expiratory film concept.
Also, you need to understand the segments of the lung and how to identify them, the role of different X-ray views, and common pathologies that can be identified on the X-ray.
As mentioned by Dr. Abha Mahashur, there are some pathologies that can be diagnosed on the x-ray directly and intervention can be planned on it. A structured step-by-step approach is then provided to assist in X-ray reading practically.