Cumulative radiation doses from recurrent PET–CT examinations

Author:

Hosono Makoto1ORCID,Takenaka Mamoru2,Monzen Hajime3,Tamura Mikoto3,Kudo Masatoshi2,Nishimura Yasumasa1

Affiliation:

1. Department of Radiation Oncology, Faculty of Medicine, Kindai University, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka, Japan

2. Department of Gastroenterology, Faculty of Medicine, Kindai University, Ohno-Higashi, Osaka-Sayama, Osaka, Japan

3. . Department of Medical Physics, Graduate School of Medical Sciences, Kindai University, Ohno-Higashi, Osaka-Sayama, Osaka, Japan

Abstract

Positron emission tomography (PET–CT) is an essential imaging modality for the management of various diseases. Increasing numbers of PET–CT examinations are carried out across the world and deliver benefits to patients; however, there are concerns about the cumulative radiation doses from these examinations in patients. Compared to the radiation exposure delivered by CT, there have been few reports on the frequency of patients with a cumulative effective radiation dose of ≥100 mSv from repeated PET–CT examinations. The emerging dose tracking system facilitates surveys on patient cumulative doses by PET–CT because it can easily wrap up exposure doses of PET radiopharmaceuticals and CT. Regardless of the use of a dose tracking system, implementation of justification for PET–CT examinations and utilisation of dose reduction measures are key issues in coping with the cumulative dose in patients. Despite all the advantages of PET/MRI such as eliminating radiation exposure from CT and providing good tissue contrast in MRI, it is expensive and cannot be introduced at every facility; thus, it is still necessary to utilise PET–CT with radiation reduction measures in most clinical situations.

Publisher

British Institute of Radiology

Subject

Radiology Nuclear Medicine and imaging,General Medicine

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