Angina pectoris is a narrowing of the coronary arteries that causes insufficient blood supply to the heart. The location of the pain can be in front of or behind the sternum or in the left anterior chest, and the nature of the pain is usually stabbing, cramping or burning. The gold standard for detecting angina is coronary angiography, and coronary CT can also be done to determine whether there is stenosis in the heart vessels and the location and extent of the stenosis. In addition, chest pain should also rule out pulmonary disorders. CT examination of the lungs can help diagnose inflammation of the lungs, tuberculosis of the lungs, and lung occupancy may cause a vague pain in the chest. Orthopedic diseases should also be ruled out, as sternal and cartilage diseases or small joint disorders may cause vague chest pain. A few cases of shingles in the early stages can also cause chest pain if they grow in the anterior chest area.