X-ray is the quickest and easiest way for a physician to verify and assess broken bones. X-ray is also used to identify disease processes in bone such as cancer. X-rays of the chest are the most frequently ordered diagnostic tests. Chest x-rays are taken for evaluation of the lungs, heart, and chest wall. Patients may have a chest x-ray for symptoms such as shortness of breath, a bad or persistent cough, chest pain, chest injury, or even fever.