Investigación

 

Quality control of the breast ca treatments on HDR brachytherapy with TLD-100

 

F. Torres Hoyosª, N. De La Espriella Vélez^b and A. Sánchez Caraballo^c

 

^a Materials and Applied Physics Group, Universidad de Córdoba, Córdoba 230002, Colombia Universidad Cooperativa de Colombia, Montería, Colombia. e-mail: franciscotorreshoyos@yahoo.com

^b Grupo GAMASCO, Universidad de Córdoba, Montería, Colombia.

^c Departamento de enfermería, Universidad de Córdoba, Montería, Colombia.

 

Received 6 January 2014.
Accepted 25 August 2014.

 

Abstract

An anthropomorphic Phantom, a female trunk, was built with a natural bone structure and experimental material coated, glycerin and water-based material called JJT to build soft tissue equivalent to the muscle of human tissue, and a polymer (styrofoam) to build the lung as critical organ to simulate the treatment of breast cancer, with high dose rate brachytherapy (HDR) and sources of Ir-192. The treatments were planned and calculated for the critical organ: Lung, and injury of 2 cm in diameter in breast with MicroSelectron HDR system and the software Plato Brachytherapy V 14.1 of the Nucletron (Netherlands) which uses the standard protocol of radiotherapy for brachytherapy treatments. The dose experimentally measured with dosimeters TLD-100 LIF: Mg; Ti, which were previously calibrated, were placed in the same positions and bodies mentioned above, with less than 5% uncertainty. The reading dosimeters was carried out in a Harshaw TLD 4500.The results obtained for calculated treatments, using the standard simulator, and the experimental with TLD-100, show a high concordance, as they are on average a ± 1.1% making process becomes in a quality control of this type of treatments.

Keywords: TLD-100; anthropomorphic phantom; brachytherapy HDR; breast.

 

PACS: 87.53. Jw; 87.66.Xa; 87.66.Sq

 

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References

1. J.R. Cameron, N. Suntharalingam, and G. Kenney, Thermoluminiscent Dosimetry, the university of Wisconsin Press, (Madinson Mirwaukee, and London, 1968).         [ Links ]

2. ICRU Report 59. Dose and Volumen Specification for Reporting Interstial Therapy, International commission on Radiation and Measurements (ICRU Publications, Bethesda. USA. 1997).         [ Links ]

3. TG 43; American Association of Physicist in Medicine (AAPM). Dosimetry of brachyterapy Sources. Med. Phys. 22 (1995) 209-239.         [ Links ]

4. J. Vásquez, G. Murcia, and M.C. Plazas, Caracterización Dosimétrica del material JJT para uso en radioterapia. Trabajo de grado, (Universidad Pedagógica y Tecnológica de Colombia. Tunja 2000).         [ Links ]

5. ICRU Report 44. Tissue Substitute in Radiation Dosimetry and Measurement (ICRU Publication, Bethesda. USA, 1989).         [ Links ]

6. Technical Reports Series 277. Absorbed Dose determination in photon and electron beams. An International Code of Practice Second Edition. International Atomic Energy Agency, (1987).         [ Links ]

7. Goetsch; Attix; Pearson, Thomadsen. Calibration of Ir 192 High Dose Rate Afterloading Systems. Medical Physics 18 (1991) 462-467.         [ Links ]

8. Plato Brachytherapy Afterloading V 14.1. User Manual, Nucletron. Netherlands, (1999).         [ Links ]

9. ARCAL XXX. Aspectos Físicos de la Garantía de Calidad en Radioterapia: Protocolo de Control de Calidad. Proyecto RLA/6/032 (1999). Mejoramiento de la Calidad en Radioterapia. Apéndice J. Tabla J1.         [ Links ]

10. F. Attix, Introduction to Radiological Physics and Radiation Dosimetry, (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2004).         [ Links ]

11. R. Nath, L. Anderson, G. Luxton, Medical Physics 22 (1995) 209-234 .         [ Links ]

12. S.W.S. McKeever, M. Moscovitch, and P.D. Townsend, Nuclear Technology Publisching (1995) 204-222.         [ Links ]

13. J.L. Muñiz, Métodos experimentales de dosimetría postal para el control de calidad en radioterapia basados en LiF:Mg, Ti (TLD-100) y LiF:Mg, Cu,P (GR-200): Aplicación de métodos numéricos al análisis de las curvas de termoluminiscencia. Madrid, (1999), 203 h. Tesis Doctoral (Doctor en Ciencias Físicas). Universidad Complutense de Madrid. Facultad de Ciencias Físicas. Departamento de Física de Materiales.         [ Links ]

14. S.W.S. McKeever and Y.S. Horowit, Radiat. Phys. Chem 36 (1990) 35.         [ Links ]