European Radiology

, Volume 16, Issue 12, pp 2866–2874

Impact of the introduction of 16-row MDCT on image quality and patient dose: phantom study and multi-centre survey

  • Francis R. Verdun
  • Nicolas Theumann
  • Pierre-Alexandre Poletti
  • Daniel Gutierrez
  • Abbas Aroua
  • Pierre Schnyder
  • Jean-François Valley
  • Salah D. Qanadli
Computer Tomography


The purpose was to compare the image quality and patient dose between 4- and 16-row MDCT units and to evaluate the dispersion of the dose delivered for common clinical examinations. Four 4- and 16-row MDCT units were used in the study. Image noise levels from images of a CatPhan phantom were compared for all units using a given CTDIvol of 15.0±1.0 mGy. Standard acquisition protocols from ten centres, shifted from 4- to 16-row MDCT (plus one additional centre for 16-row MDCT), were compared for cerebral angiography and standard chest and abdomen examinations. In addition, the protocols used with 16-row MDCT units for diagnosis of the unstable shoulder and for cardiac examinations were also compared. The introduction of 16-MSCT units did not reduce the performance of the detectors. Concerning the acquisition protocols, a wide range in practice was observed for standard examinations; DLP varied from 800 to 5,120, 130 to 860, 410 to 1,790 and 850 to 2,500 for cerebral angiography, standard chest, standard abdomen and heart examinations, respectively.The introduction of 16-row MDCT did not, on average, increase the patient dose for standard chest and abdominal examinations. However, a significant dose increase has been observed for cerebral angiography. There is a wide dispersion in the doses delivered, especially for cardiac imaging.


Multi-slice spiral CT CT dose survey Dose reference levels (DRL) 


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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • Francis R. Verdun
    • 1
  • Nicolas Theumann
    • 2
  • Pierre-Alexandre Poletti
    • 3
  • Daniel Gutierrez
    • 1
  • Abbas Aroua
    • 1
  • Pierre Schnyder
    • 2
  • Jean-François Valley
    • 1
  • Salah D. Qanadli
    • 2
  1. 1.University Institute for Radiation Physics (IRA-DUMSC)LausanneSwitzerland
  2. 2.Department of Diagnostic and Interventional RadiologyUniversity Hospital of Lausanne (CHUV), Cardiovascular and Metabolic Diseases CentreLausanneSwitzerland
  3. 3.Department of RadiologyUniversity Hospital of Geneva (HUG)Genève-14Switzerland

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