<unk>  is typically used to define limits on mammography exposures by national and international organisations such as the European Union and International Atomic Energy Agency, at <2.5 milligray (mGy) per exposure to a standard breast (4.5 cm PMMA). In routine quality assurance testing of mammographic equipment,<unk>  measurements for a range of effective breast thicknesses with PMMA, and from real patient exposures, is widely recommended.
Mean glandular dose
Basic reproduction number
Frequency following response
Risk of mortality
Prevalence of circumcision
Cancer slope factor
Infection rate
Dose profile