title: CT dose optimization when changing to CT multi-detector row technology.
abstract: The purpose of this article was to review the strategies to control patient dose in adult and pediatric computed tomography (CT), taking into account the change of technology from single-detector row CT to multi-detector row CT. First the relationships between computed tomography dose index, dose length product, and effective dose in adult and pediatric CT are revised, along with the diagnostic reference level concept. Then the effect of image noise as a function of volume computed tomography dose index, reconstructed slice thickness, and the size of the patient are described. Finally, the potential of tube current modulation CT is discussed.
authors.affiliation: University Institute for Radiation Physics, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland. francis.verdun@chuv.ch
authors.forename: Francis R
authors.initials: FR
authors.lastname: Verdun
authors.forename: Daniel
authors.initials: D
authors.lastname: Gutierrez
authors.forename: Pierre
authors.initials: P
authors.lastname: Schnyder
authors.forename: Abbas
authors.initials: A
authors.lastname: Aroua
authors.forename: François
authors.initials: F
authors.lastname: Bochud
authors.forename: François
authors.initials: F
authors.lastname: Gudinchet
mesh_terms: D006801:Humans; D011829:Radiation Dosage; D018570:Risk Assessment; D012307:Risk Factors; D014057:Tomography, X-Ray Computed / Q000295:instrumentation* / Q000592:standards*