Amongst all X-ray requests, the most common request is for a chest X-ray. A good quality chest X-ray is a must to detect chest diseases. A proper X-ray is correctly centred and taken with the correct exposure factors while the patient holds breath in deep inspiration. It is essential for both the radiologic technologist and radiologist to be familiar with what a good quality X-ray looks like and the various positions in which a chest X-ray can be performed.