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Patient doses from PET-CT procedures.

S Avramova-Cholakova1, S Ivanova2, E Petrova3

  • 1National Centre of Radiobiology and Radiation Protection, Sofia, Bulgaria s_avramova@mail.bg.

Radiation Protection Dosimetry
|April 8, 2015
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Summary
This summary is machine-generated.

This study estimated patient radiation doses from positron emission tomography-computed tomography (PET-CT) scans in Bulgaria. Doses were found to be comparable to international benchmarks, suggesting current practices are safe.

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Area of Science:

  • Medical Imaging
  • Radiological Protection
  • Nuclear Medicine

Background:

  • Bulgaria introduced Positron Emission Tomography (PET) in 2009, now operating two hybrid PET-computed tomography (CT) systems.
  • Assessing patient radiation effective doses from PET-CT procedures is crucial for safety and optimization.

Purpose of the Study:

  • To estimate patient effective doses from PET-CT procedures in Bulgaria.
  • To explore potential dose optimization strategies for PET-CT examinations.

Main Methods:

  • Retrospective data collection from 108 patients (50 on Philips Gemini TF, 58 on GE Discovery 600).
  • Whole-body (18)F-2-fluoro-2-deoxy-D-glucose (FDG) PET-CT examinations.
  • Effective dose calculation using CT Expo software and NRPB coefficients for CT, and ICRP 80 for PET.

Main Results:

  • Average effective doses from CT component: 8.0-8.9 mSv (Philips) and 7.8-8.7 mSv (GE).
  • Average effective doses from PET component: 4.9 mSv (Philips) and 5.9 mSv (GE).
  • Calculated doses are relatively lower or comparable to similar international surveys.

Conclusions:

  • Patient effective doses from PET-CT in Bulgaria are within acceptable ranges.
  • Further analysis of observed dose differences can inform optimization efforts.
  • This study provides baseline data for radiation dose management in Bulgarian PET-CT centers.