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

Verdun, Francis ; Theumann, Nicolas ; Poletti, Pierre-Alexandre ; Gutierrez, Daniel ; Aroua, Abbas ; Schnyder, Pierre ; Valley, Jean-François ; Qanadli, Salah

In: European Radiology, 2006, vol. 16, no. 12, p. 2866-2874

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    Titre
    • Impact of the introduction of 16-row MDCT on image quality and patient dose: phantom study and multi-centre survey
    Auteur
    • Verdun, Francis. University Institute for Radiation Physics (IRA-DUMSC), Grand-Pré 1, CH-1007, Lausanne, Switzerland
    • Theumann, Nicolas. Department of Diagnostic and Interventional Radiology, University Hospital of Lausanne (CHUV), Cardiovascular and Metabolic Diseases Centre, 1011, Lausanne, Switzerland
    • Poletti, Pierre-Alexandre. Department of Radiology, University Hospital of Geneva (HUG), 1211, Genève-14, Switzerland
    • Gutierrez, Daniel. University Institute for Radiation Physics (IRA-DUMSC), Grand-Pré 1, CH-1007, Lausanne, Switzerland
    • Aroua, Abbas. University Institute for Radiation Physics (IRA-DUMSC), Grand-Pré 1, CH-1007, Lausanne, Switzerland
    • Schnyder, Pierre. Department of Diagnostic and Interventional Radiology, University Hospital of Lausanne (CHUV), Cardiovascular and Metabolic Diseases Centre, 1011, Lausanne, Switzerland
    • Valley, Jean-François. University Institute for Radiation Physics (IRA-DUMSC), Grand-Pré 1, CH-1007, Lausanne, Switzerland
    • Qanadli, Salah. Department of Diagnostic and Interventional Radiology, University Hospital of Lausanne (CHUV), Cardiovascular and Metabolic Diseases Centre, 1011, Lausanne, Switzerland
    Type de document
    • Postprint
    Identifiant OAI-PMH
    • oai:doc.rero.ch:311289
    Summary
    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±1.0mGy. 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 5,120mGy.cm, 130 to 860mGy.cm, 410 to 1,790mGy.cm and 850 to 2,500mGy.cm 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