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Drs. Ross and Tonkopi publish Cone Beam CT Imaging paper

Posted by Krista Whitehouse on January 13, 2016 in Nuclear Medicine
Dr. Andrew Ross
Dr. Andrew Ross

From PubMed

Assessment Of Effective Dose From Cone Beam Ct Imaging In Spect/ct Examination In Comparison With Other Modalities

Tonkopi E, Ross AA

Abstract

The aim of this study was to assess radiation dose from the cone beam computed tomography (CBCT) component of single photon emission tomography/computed tomography (SPECT/CT) examinations and to compare it with the radiopharmaceutical related dose as well as dose from multidetector computed tomography (MDCT). Effective dose (ED) from computed tomography (CT) was estimated using dose-length product values and anatomy-specific conversion factors. The contribution from the SPECT component was evaluated using ED per unit administered activity for the radiopharmaceuticals listed in the International Commission on Radiological Protection Publications 80 and 106. With the exception of cardiac studies (0.11 mSv), the CBCT dose (3.96-6.04 mSv) was similar to that from the radiopharmaceutical accounting for 29-56 % of the total ED from the examination. In comparison with MDCT examinations, the CBCT dose was 48 and 42 % lower for abdomen/pelvis and chest/abdomen/pelvis scans, respectively, while in the chest the CBCT scan resulted in higher dose (23 %). Radiation dose from the CT component should be taken into consideration when evaluating total SPECT/CT patient dose.

Author information

  • 1Department of Diagnostic Radiology, Dalhousie University, 1276 South Park Street, Halifax, NS B3H2Y9, Canada Department of Diagnostic Imaging, Queen Elizabeth II Health Sciences Centre, 1276 South Park Street, Halifax, NS B3H2Y9, Canada elena.tonkopi@cdha.nshealth.ca.
  • 2Department of Diagnostic Radiology, Dalhousie University, 1276 South Park Street, Halifax, NS B3H2Y9, Canada Department of Diagnostic Imaging, Queen Elizabeth II Health Sciences Centre, 1276 South Park Street, Halifax, NS B3H2Y9, Canada.

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