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Updated: Feb 9, 2026
06:20
Irradiator Commissioning and Dosimetry for Assessment of LQ α and β Parameters, Radiation Dosing Schema, and in vivo Dose Deposition
Published on: March 11, 2021
7.8K
Radiation dose assessment for occupationally exposed workers in Malawi
Getrude Chinangwa1, Joseph K Amoako2, John J Fletcher3
1Graduate School of Nuclear and Allied Sciences, University of Ghana, Accra, Ghana.
Summary
Radiographers in Malawi received radiation doses below international limits. Scattered radiation dose rates at control panels were also within safe levels, ensuring worker safety in X-ray departments.
Area of Science:
- Medical Physics
- Radiological Protection
- Occupational Health
Background:
- Assesses radiation exposure for radiographers in Malawian hospitals.
- Evaluates scattered radiation dose rates at X-ray control panels.
- Compares findings against International Commission on Radiological Protection (ICRP) limits.
Purpose of the Study:
- To evaluate occupational radiation doses for radiographers.
- To measure scattered radiation dose rates in X-ray control areas.
- To ensure compliance with international radiation safety standards.
Main Methods:
- Utilized Thermoluminescent Dosimeters (TLDs) for individual worker dosimetry over one month.
- Employed survey meters for ambient dose rate measurements.
- Included fifteen radiographers across three Malawian hospitals.
Main Results:
- The average monthly occupational dose for radiographers was 0.247 mSv.
- Average ambient dose rates varied: 0.39 µSv/hr (Mtengo wa Nthenga), 5.03 µSv/hr (Bwaila), and 4 µSv/hr (Kamuzu Central).
- All measured dose levels were found to be below ICRP-recommended limits.
Conclusions:
- Occupational radiation doses for radiographers in the studied Malawian hospitals are within safe international limits.
- Scattered radiation levels at control panels pose no undue risk to personnel.
- The findings support the effectiveness of current radiation protection measures in these facilities.
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