The chest area of the body; commonly used in medical contexts to refer to the thoracic region and its organs.
胸部レントゲンを撮って肺の状態を確認した。
A chest X-ray was taken to check the condition of the lungs.
事故で胸部を強く打ち、胸の痛みが続いている。
He was hit hard in the chest in the accident and continues to have chest pain.