التفاصيل البيبلوغرافية
| العنوان: |
Intercomparison of calibration procedures for 192Ir HDR sources in Brazil. |
| المؤلفون: |
de Almeida CE; Laboratório de Ciências Radiológicas-LCR-DBB-UERJ, Rio de Janeiro, Brazil. cea@uerj.br, Pereira AJ, Marechal MH, Pereira G, Cruz JC, Ferraz JC, Giordani AJ, Khalil CM, Martins RH, Menegussi G, Moreira D, Rocha JR, Pinto MA |
| المصدر: |
Physics in medicine and biology [Phys Med Biol] 1999 Mar; Vol. 44 (3), pp. N31-8. |
| نوع المنشور: |
Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
| اللغة: |
English |
| بيانات الدورية: |
Publisher: IOP Publishing Country of Publication: England NLM ID: 0401220 Publication Model: Print Cited Medium: Print ISSN: 0031-9155 (Print) Linking ISSN: 00319155 NLM ISO Abbreviation: Phys Med Biol Subsets: MEDLINE |
| أسماء مطبوعة: |
Original Publication: Bristol : IOP Publishing |
| مواضيع طبية MeSH: |
Radiometry*, Iridium Radioisotopes/*analysis, Brachytherapy ; Brazil ; Calibration ; Gamma Rays |
| مستخلص: |
The lack of well established dosimetry protocols for HDR sources is a point of great concern regarding the uniformity of procedures within a particular country and worldwide. The main objective of this paper is to report the results from ten institutions of an intercomparison of calibration procedures for 192Ir HDR sources currently in use in Brazil. The treatment irradiator of one institution was calibrated by a reference system and used by all participants with their own measuring electrometers and ionization chambers under the same experimental conditions. Two methods were used: the calibration jig and the well-type ionization chamber. Each participant was allowed to use their own method and formalism. The results of this exercise were very positive since this was the first time in Brazil that a group of users gathered to share their experience and openly discuss the physical concepts behind the calibration procedures. The results were all within +/-3.0%, except one case where -4.6% was observed and later identified as a problem with the Nk value for x-rays. Though the magnitude of the deviations found was generally acceptable considering the diversity of formalisms currently in use, a proposal is now being prepared to be adopted as a national protocol. The identification of the institutions was left out for the sake of confidentiality. |
| المشرفين على المادة: |
0 (Iridium Radioisotopes) |
| تواريخ الأحداث: |
Date Created: 19990422 Date Completed: 19990527 Latest Revision: 20190726 |
| رمز التحديث: |
20231215 |
| DOI: |
10.1088/0031-9155/44/3/006 |
| PMID: |
10211813 |
| قاعدة البيانات: |
MEDLINE |
