Any method, medicine, or device used to prolong life. Whether, when, and how to use life-sustaining treatments are difficult topics that require careful consideration by patients, their surrogates, and health care professionals.
A radiological subspecialty that makes use of imaging technologies to assist and guide invasive procedures, (e.g., the collection of tissue specimens from internal organs, or the placement of catheters, drugs, radioactive materials, or stents within body structures).