title: Digital cine angiography permits radiation dose reduction without reduction in image quality.
abstract: OBJECTIVE
  To investigate how much the radiation dose in digital cine angiography (DCA) systems can be reduced while maintaining an image quality equivalent to that of conventional cine angiography (CCA).
  
  
  METHODS
  Simulated vessel phantoms were subjected to DCA and CCA. In DCA, the input dose value to the image intensifier built in the system was 0.10, 0.12, 0.14, 0.17, 0.2, and 0.24 microGy. The detectability for simulated vessel phantoms was visually evaluated by five observers. The radiation dose was measured using radiofluorescent glass-rod dosimeters. Doses of digital cine imaging were measured as relative values with the dose of CCA considered as 1.0.
  
  
  RESULTS
  The relative DCA/CCA values in DCA, measured by radiofluorescent glass-rod dosimeters, ranged from 0.414 to 0.901 for simulated vessel phantoms
  
  
  CONCLUSIONS
  DCA allows a reduction by 59% of the radiation dose compared with CCA without reduction of image quality.
authors.affiliation: Department of Radiology, Kyushu University Hospital.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Funama
authors.forename: Kazuo
authors.initials: K
authors.lastname: Awai
authors.forename: Yoshiyuki
authors.initials: Y
authors.lastname: Umezu
authors.forename: Masamichi
authors.initials: M
authors.lastname: Shimamura
authors.forename: Kazuhisa
authors.initials: K
authors.lastname: Ogawa
authors.forename: Toyoyuki
authors.initials: T
authors.lastname: Kato
authors.forename: Masahiro
authors.initials: M
authors.lastname: Hashida
authors.forename: Yasuyuki
authors.initials: Y
authors.lastname: Yamashita
mesh_terms: D000704:Analysis of Variance; D015901:Angiography, Digital Subtraction / Q000379:methods*; D006801:Humans; D019047:Phantoms, Imaging; D011785:Quality Assurance, Health Care; D011829:Radiation Dosage; D011835:Radiation Protection / Q000379:methods*