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Medical radiation sources are used deliberately in the healthcare of patients and are designed for use in a controlled manner. There obviously are some adverse health risks associated with the use of radiation in medicine <ref name="Pub105">[[ICRP Publication 105]] Radiological Protection in Medicine. Ann. ICRP 37(6), 2007.</ref>, with higher amounts of radiation being associated with higher risks. The undisputed health benefits of [[Application_of_ionising_radiation_in_healthcare_(demo)#Diagnostic_Radiology|diagnostic radiology]] ([[ICRP Publication 121]] Radiological Protection in Paediatric Diagnostic and Interventional Radiology, [[ICRP Publication 102]] Managing Patient Dose in Multi-Detector Computed Tomography (MDCT), [[ICRP Publication 87]] Managing Patient Dose in Computed Tomography) using x-ray or nuclear medicine ([[ICRP Publication 128|Publication 128]]) may be accompanied by a generally very small risk (probability) of deleterious effects, while in radiation therapy ([[ICRP Publication 127]] Radiological Protection in Ion Beam Radiotherapy, [[ICRP Publication 98]] Radiation Safety Aspects of Brachytherapy for Prostate Cancer using Permanently Implanted Sources, [[ICRP Publication 97]]: Prevention of High-dose-rate Brachytherapy Accidents, [[ICRP Publication 86]] Prevention of Accidents to Patients Undergoing Radiation Therapy), such risk can be much higher as large amounts of radiation are required.