title: [Technical parameters to decrease the radiation dose from conventional and digital radiographs].
abstract: Reducing radiation dose while maintaining adequate image quality on conventional and digital radiographs requires optimal use of the unit. Additional filtration avoids unnecessary tissue exposure and improves photon transmission. Automatic exposure control may reduce exposure and dose. The volume of tissue imaged must be limited by the use of diaphragms and shutters or compression. Sensitive detectors with increased photon detection also contribute to reduce dose. Radiographic films combined to rare-earth screens also afford a good photon-conversion efficiency. Large area flat panel amorphous silicon x-ray sensors may also reduce dose up to 50% compared to films. Finally, calculation of the Kerma-area product independent of the source distance constitutes an important indicator of radiation dose.
authors.affiliation: Service de Radiothérapie, Hôpital Tenon, 4 Rue de la Chine, 75020 Paris, France. jean-noel.foulquier@tnn.aphp.fr
authors.forename: J N
authors.initials: JN
authors.lastname: Foulquier
mesh_terms: D001822:Body Burden; D005602:France; D006283:Health Physics; D006801:Humans; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000517:prevention & control*; D011834:Radiation Monitoring / Q000295:instrumentation / Q000379:methods / Q000592:standards; D011835:Radiation Protection / Q000379:methods* / Q000592:standards; D011856:Radiographic Image Enhancement / Q000379:methods* / Q000592:standards; D011874:Radiometry / Q000295:instrumentation / Q000379:methods / Q000592:standards; D012015:Reference Standards; D013679:Technology, Radiologic / Q000379:methods* / Q000592:standards; D014963:X-Ray Intensifying Screens