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Updated: Jun 6, 2026

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A high-sensitivity multidetector whole-body counter.

J A Kalef-Ezra¹, S T Valakis, T Soupsanas

¹Medical Physics Laboratory, Medical School, University of Ioannina, Ioannina 45110, Greece. jkalef@cc.uoi.gr

Radiation Protection Dosimetry

|November 16, 2010

Summary

A new whole-body counter monitors internal contamination using 16 detectors. Its accuracy in counting efficacy predictions was validated in adults, enabling clinical research applications.

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Area of Science:

Nuclear physics and instrumentation
Medical physics
Radiological health

Background:

Internal contamination monitoring is crucial for radiation safety and clinical research.
Existing whole-body counters may have limitations in accuracy and applicability across diverse body types.

Purpose of the Study:

To present a prototype multidetector shadow-shield whole-body counter.
To evaluate its performance as a monitor of internal contamination and a tool for clinical research.

Main Methods:

The counter utilizes 16 Sodium Iodide (Thallium-activated) [NaI(Tl)] detectors.
Counting efficacy predictions were validated using X-ray absorptiometry in adults of various body shapes and sizes.

Main Results:

The prototype demonstrated accuracy in counting efficacy predictions across a range of adult body compositions.
The precision of total body potassium measurements was sufficient for clinical follow-up.

Conclusions:

The developed whole-body counter is suitable for monitoring internal contamination.
Its validated accuracy and precision make it a valuable tool for clinical research and follow-up studies.