A chest X-ray is a medical imaging test that uses a small amount of radiation to create pictures of the structures inside the chest, including the heart, lungs, and bones. It helps doctors diagnose various conditions, such as infections, tumors, and fractures. During the procedure, a patient stands in front of an X-ray machine and takes a deep breath while the image is captured. The process is quick, usually taking only a few minutes, and the results are reviewed by a radiologist to provide insights for further medical evaluation or treatment.