Welcome to the
Dosimetry Standards section of NMISA
The Dosimetry Standards (DS) section’s vision is to be a measurement centre of excellence inspired to consistently deliver outstanding, innovative and internationally comparable measurement solutions that support the country’s trade, people’s quality of life and enable the protection of the environment.
Our mission is to provide South African industry and environmental, health and safety sectors with fit-for-purpose measurement standards and measurements. This is achieved by keeping and maintaining the national measurement standards and units to an acceptable international standard; and by disseminating traceability to the South African industry.
Nuclear and radiation techniques are often the sole means of diagnosis and treatment in a large number of health problems, or complement non-nuclear techniques. Application of accurate doses, determined for each patient through careful evaluation and calculations, is of utmost importance for the effectiveness of the application of radiation. Therefore, dosimetry, while not a diagnostic or treatment method, also plays an important role in the application of radionuclides and radiotherapy. The dosimetry section maintains the link between the users of radiation in the country and an international measurement system. This ensures that correct doses are administered to patients decreasing possibilities of maltreatment and thus causing recurrences in the disease.
The Dosimetry Standards Section offers a wide range of services within radiation measurements. Services currently offered by the Section include the following:
- Calibration Services in Radiation Protection
- Calibration Service in Radiation Therapy in absorbed dose to water using Co-60
- Calibration Service in Brachytherapy using air kerma reference rate with Ir-192 and Co-60
- Calibration Service in Diagnostic Radiology in air kerma, PPV, Air kerma length product
- Hands On training in dosimetry measurements
- Courses in radiation measurements are also provided on request
Core infrastructure has been setup and the DS is in position to provide the Health sector traceable measurements in imaging. This is very important to ensure that proper diagnosis can be made using x-rays with a reduced risk of overdosing the patient. Current capabilities cover air kerma/rate and x-ray voltage through Practical peak voltage measurement capabilities.
Current developments include: Air kerma length product, and Air kerma area product. The aim is to also upgrade the measurement capability in the area to primary standard level.
All facilities used to provide the service in radiation protection to the industry have been replaced and are currently being commissioned. These are the facilities that are core in supporting the industry in radiation protection and also contribute a huge percentage in the external income generated by the section.
|Mr Sibusiso Jozela||Head: Dosimetry Standards Section|
|Mr Sonwabile Ngcezu||Scientist|
|Ms Nomonde Tebekana||Scientist|
|Mr Refuoe Pepenene||Scientist|
|Ms Wendy Thoka||Scientist|
|Mr Dithole Seepamore||Scientist|
|Mr Daniel Cwele||Scientist|
|Mr Sicelo Kubheka||In-Service Trainee|
|Ms Maria Skosana||In-Service Trainee|