EEfforts are needed to limit radiation exposure. New research indicates that hemodialysis patients are exposed to unnecessarily high radiation doses that put them at increased risk for the development of cancer (De Mauri A, et al. Estimated radiation exposure from medical imaging in hemodialysis patients. (J Am Soc Nephrol, March 2011). The results add to a growing body of literature suggesting that many patients with chronic and recurrent medical problems receive potentially dangerous doses of radiation from medical imaging.