Interventional radiology refers to therapeutic procedures that are done using fluoroscopy, ultrasound, CT, or MRI guidance.
Some interventional radiologic procedures for palliation in patients with cancer include: drainage for malignant obstruction of renal and biliary tracts; dilatation and stenting for malignant occlusions of the gastrointestinal, renal and respiratory tracts; feeding gastrostomy; palliative embolization to control pain, hemorrhage, and hormone production and reduce tumor bulk.

Sabharwal R, Fotiadis NI, Adam A. The Role of Interventional Radiology in the Palliative Care of Patients with Cancer; Hanks G, Cherny NI, Christakis NA, Fallon M, Kaasa S, Portenoy RK (Ed).Oxford Textbook of Palliative Medicine. Oxford University Press,4th ed. 2010, pp. 573-584.