Assessment of the interventional neuroradiology workforce in the United States: a review of the existing data.

Endovascular surgical neuroradiology, also known as interventional neuroradiology, is a relatively new medical subspecialty. Endovascular surgical neurora-diology is now recognized as a specialty by the Amer-ican College of Graduate Medical Education (ACGME), and training standards have been defined (1). The field has grown rapidly in the past decade and will likely continue to grow. Much of the growth in endovascular surgical neuroradiology has been driven by the success of the treatment of cerebral aneurysms with the Guglielmi detachable coil (GDC). Carotid stent placement, intracranial angioplasty and stent placement, and acute ischemic stroke therapy are being intensively investigated and might add to the demand for endovascular surgical neuroradiolo-