An experimental study of the dose distribution in water around 137Cs tubes used in brachytherapy
| Autor: | S.C. Klevenhagen |
|---|---|
| Rok vydání: | 1973 |
| Předmět: |
Silicon
Materials science medicine.medical_treatment Brachytherapy Analytical chemistry chemistry.chemical_element Models Biological Particle detector Percentage depth dose curve Physical Phenomena Radiation Monitoring medicine Cesium Isotopes Methods Radiology Nuclear Medicine and imaging Radioisotopes business.industry Physics Detector Water Radiotherapy Dosage General Medicine Semiconductor detector chemistry Caesium Ionization chamber Measuring instrument Nuclear medicine business Radium |
| Zdroj: | The British journal of radiology. 46(552) |
| ISSN: | 0007-1285 |
| Popis: | The dose distribution in water around type CDC.G 137Cs tubes (The Radiochemical Centre, Amersham) was measured by means of a silicon surface barrier p-n junction detector (for relative values) and a small ionization chamber (for absolute values). The cylindrical semiconductor detector, of 3 mm outer diameter, had high sensitivity, good spatial resolution, and satisfactory energy dependence for measurements of a relative nature. Thirty caesium tubes were investigated; all showed dose distributions symmetrical about the longitudinal axis of the source but asymmetrical about the lateral axis, the latter effect varying in detail from source to source. The distribution for a “typical” caesium source was obtained by averaging the data of ten sources with different distribution patterns. The absolute dose rates and distributions of 137Cs and radium tubes of similar size, equal activity, and identical screenage (0·5 mm Ir–Pt) were compared. By matching the dose rates on the lateral axis (the caesium dose... |
| Databáze: | OpenAIRE |
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