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Updated: May 24, 2026

Whole-body PET/MRI of Pediatric Patients: The Details That Matter
Published on: December 19, 2017
Minimizing and communicating radiation risk in pediatric nuclear medicine
Frederic H Fahey1, S Ted Treves, S James Adelstein
1Division of Nuclear Medicine and Molecular Imaging, Department of Radiology, Children's Hospital Boston, Boston, Massachusetts 02115, USA. frederic.fahey@childrens.harvard.edu
Insights
Pediatric nuclear medicine requires understanding radiation risks. This review covers dosimetry, risk estimation, and communication strategies for effective pediatric patient care.
Area of Science:
- Pediatric Nuclear Medicine
- Radiological Sciences
- Medical Physics
Background:
- Pediatric nuclear medicine is crucial across various specialties like oncology and cardiology.
- Medical imaging radiation exposure is under increased scrutiny, especially for younger patients.
- Effective communication of radiation risks to families is essential.
Purpose of the Study:
- To review radiation dosimetry for radiopharmaceuticals and CT in pediatric nuclear medicine.
- To explain the scientific basis of radiation risk estimation in this population.
- To discuss strategies for communicating risk and reducing radiation dose.
Main Methods:
- Review of radiation dosimetry principles for radiopharmaceuticals.
- Analysis of radiation dosimetry for CT in hybrid imaging (PET/CT, SPECT/CT).
- Examination of radiation risk models and communication techniques.
Main Results:
- Dosimetry data for common pediatric nuclear medicine procedures and CT protocols.
- Understanding of age-dependent radiation risk factors.
- Effective communication strategies and dose reduction techniques are presented.
Conclusions:
- Practitioners need expertise in dosimetry and risk communication for pediatric nuclear medicine.
- Optimizing radiation safety is paramount in pediatric imaging.
- This article provides a comprehensive guide for managing radiation in pediatric nuclear medicine.
Abstract:
The value of pediatric nuclear medicine is well established. Pediatric patients are referred to nuclear medicine from nearly all pediatric specialties including urology, oncology, cardiology, gastroenterology, and orthopedics. Radiation exposure is associated with a potential, small, risk of inducing cancer in the patient later in life and is higher in younger patients. Recently, there has been enhanced interest in exposure to radiation from medical imaging. Thus, it is incumbent on practitioners of pediatric nuclear medicine to have an understanding of dosimetry and radiation risk to communicate effectively with their patients and their families. This article reviews radiation dosimetry for radiopharmaceuticals and also CT given the recent proliferation of PET/CT and SPECT/CT. It also describes the scientific basis for radiation risk estimation in the context of pediatric nuclear medicine. Approaches for effective communication of risk to patients' families are discussed. Lastly, radiation dose reduction in pediatric nuclear medicine is explicated.
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