Interventional Radiology (IR), is a subspecialty of radiology in which minimally invasive procedures are performed using image guidance. Some of these procedures are done for diagnostic purposes (e.g. angiogram), while others are done for treatment purposes (e.g. angioplasty).

The following procedures are done in IR:

• Angiography - an X-Ray of the arteries and veins to detect blockage or narrowing of the vessels
• Angioplasty - the use of a small balloon on the tip of a catheter inserted into a blood vessel to open up an area of blockage inside the vessel
• Embolization - the insertion of a substance through a catheter into a blood vessel to stop hemorrhaging, or excessive bleeding
• Gastrostomy tubes - a gastrostomy tube (feeding tube) is inserted into the stomach if the patient is unable to take food by mouth
• Stent placement - a tiny, expandable coil, called a stent, is placed inside a blood vessel at the site of a blockage
• Needle biopsy - a small needle is inserted into the abnormal area in almost any part of the body, guided by imaging techniques, to obtain a tissue biopsy. This type of biopsy can provide a diagnosis without surgical intervention
• Injection of clot-lysing agents - clot-lysing agents, such as tissue plasminogen activator (TPA), are injected into the body to dissolve blood clots, thereby increasing blood flow to the heart or brain
• Catheter insertion - a catheter is inserted into large veins for giving chemotherapy drugs, nutritional support, and hemodialysis. A catheter may also be inserted prior to bone-marrow transplantation. 

These procedures are performed by a team of IR radiologists, nursing and x-ray technologists.