Canadian Association of Radiologists Journal
Volume 61, Issue 5 , Pages 271-279, December 2010

Strategies for Radiation-dose Reduction and Image-quality Optimization in Multidetector Computed Tomographic Coronary Angiography

  • Felipe S. Torres, MD

      Affiliations

    • Corresponding Author InformationAddress for correspondence: Felipe S. Torres, MD, Division of Cardiothoracic Imaging, Department of Medical Imaging, Toronto General Hospital, University of Toronto and University Health Network, Toronto General Hospital, 585 University Avenue, Toronto, Ontario M5G 2N2, Canada.
  • ,
  • Andrew M. Crean, MD, MRCP, FRCR
  • ,
  • Elsie T. Nguyen, MD, FRCPC
  • ,
  • Narinder Paul, MD, MRCP (UK), FRCR, FCPC

Division of Cardiothoracic Imaging, Department of Medical Imaging, Toronto General Hospital, University of Toronto and University Health Network, Toronto General Hospital, Toronto, Ontario, Canada

published online 07 June 2010.

Abstract 

The technological evolution of computed tomography (CT) in the last decade has placed CT coronary angiography (CTCA) in the spotlight of imaging modalities available to evaluate patients with coronary artery disease. Widespread utilisation of CTCA has generated concern from the medical community regarding potential health issues related to the significant radiation exposure associated with this method, and several modifications of the CTCA technique have been proposed to reduce the radiation exposure without affecting the diagnostic image quality. This review will discuss a practical approach to performing CTCA to ensure that the radiation dose is minimized while maintaining diagnostic image quality.

Résumé 

L'évolution technologique de la tomodensitométrie au cours de la dernière décennie a projeté la coronarographie par tomodensitométrie à l'avant-plan des moyens d'imagerie permettant d'évaluer les patients atteints de coronaropathie. L'utilisation très répandue de la coronarographie par tomodensitométrie a suscité des inquiétudes au sein de la collectivité médicale concernant d'éventuels problèmes de santé liés à une importante exposition aux radiations associée à cette méthode, et plusieurs modifications à apporter à la technique de coronarographie par tomodensitométrie ont été proposées afin de réduire l'exposition aux radiations sans compromettre la qualité de l'image servant au diagnostic. Cet article traitera d'une approche pratique pour effectuer des coronarographies par tomodensitométrie de façon à réduire au minimum la dose de radiation tout en maintenant la qualité de l'image servant au diagnostic.

Key Words: Multidetector computed tomography, Cardiac computed tomography, Radiation dose, Dose reduction, Image quality

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PII: S0846-5371(09)00243-5

doi:10.1016/j.carj.2009.11.013

Canadian Association of Radiologists Journal
Volume 61, Issue 5 , Pages 271-279, December 2010