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Radiation Protection Dosimetry Advance Access published online on October 3, 2009
Radiation Protection Dosimetry, doi:10.1093/rpd/ncp202
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© The Author 2009. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oxfordjournals.org

RADIATION EXPOSURE FOR MEDICAL STAFF PERFORMING QUANTITATIVE CORONARY PERFUSION PET WITH 13N-AMMONIA

Ulrik Sloth Kristoffersen1,2,*, Henrik Gutte1,2, Dorthe Skovgaard1,2, Peter Andreas Andersen1 and Andreas Kjaer1,2

1 Department of Clinical Physiology, Nuclear Medicine & PET, Copenhagen University Hospital, KF-4012, Rigshospitalet, Blegdamsvej 9, DK-2100 Copenhagen, Denmark
2 Cluster for Molecular Imaging, Faculty of Health Sciences, University of Copenhagen, Blegdamsvej 3, DK-2200 Copenhagen, Denmark

* Corresponding author: ulriksk{at}mfi.ku.dk

Received May 28, 2009, amended August 26, 2009, accepted September 2, 2009

Purpose: To evaluate radiation doses to medical staff performing quantitative 13N-ammonia myocardial perfusion positron emission tomography (PET). Methods: Seventeen PET examinations were performed. Nine examinations consisted of two PET scans (one during rest and one after pharmacological stress with dipyridamole) and eight examinations consisted of three PET scans (additionally a scan after cold pressor testing). The two nuclear technologists and the physician attending the examinations were equipped with an electronic dosemeter over the chest and thermoluminescent dosimetry chips on the right index finger and wrist. Results: The highest mean equivalent dose per examination for a staff member was 453 µSv (417–490 µSv) to the right index finger, 138 µSv (127–149 µSv) to the right wrist and 13 ± 0.8 µSv to the chest. Conclusions: Myocardial perfusion PET with 13N-ammonia exposes the staff to radiation doses that are comparable to doses from 18F-fluoro-deoxy-glucose scans and the annual doses are well within the recommended upper limits for radiation workers.


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