title: Dual-energy CT: radiation dose aspects.
abstract: OBJECTIVE
  Various applications for dual-energy CT (DECT) have been investigated and have shown substantial clinical benefits. However, only limited data are available regarding the radiation dose associated with DECT imaging. The purpose of this article is to review the available literature regarding the radiation dose associated with DECT imaging applications in comparison with conventional single-energy CT techniques.
  
  
  CONCLUSIONS
  The rediscovery of DECT and the increasing availability of this technique on clinical CT systems have opened new dimensions for CT. The advanced spectral differentiation of materials within the human body as well as the selective visualization or subtraction of iodinated contrast material or xenon provides both advanced visualization of disease-specific molecular substrates as well as additional functional information within a single scan.
authors.affiliation: Institute of Clinical Radiology and Nuclear Medicine, University Medical Center Mannheim, Medical Faculty Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, Mannheim, Germany. thomas.henzler@medma.uni-heidelberg.de
authors.forename: Thomas
authors.initials: T
authors.lastname: Henzler
authors.forename: Christian
authors.initials: C
authors.lastname: Fink
authors.forename: Stefan O
authors.initials: SO
authors.lastname: Schoenberg
authors.forename: U Joseph
authors.initials: UJ
authors.lastname: Schoepf
mesh_terms: D006801:Humans; D011829:Radiation Dosage; D011832:Radiation Injuries / Q000517:prevention & control*; D011835:Radiation Protection / Q000379:methods*; D015900:Radiography, Dual-Energy Scanned Projection / Q000379:methods*; D011874:Radiometry / Q000379:methods*; D014057:Tomography, X-Ray Computed / Q000379:methods*