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Phantom dosimetry and cancer risks estimation undergoing 6 MV photon beam by an Elekta SL-25 linac. Appl Radiat Isot 2020; 163:109232. [PMID: 32561064 DOI: 10.1016/j.apradiso.2020.109232] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 04/25/2020] [Accepted: 05/17/2020] [Indexed: 01/15/2023]
Abstract
The High-energy linear accelerator (linac) is a valuable tool and the most commonly used devices for external beam radiation treatments in subjects suffer from cancer. To estimate the dose deposited in several organs of a female patient due to pelvic irradiation by an Elekta SL-25 linac in 6 MV photon beam mode, the MCNPX code is used considering the most details of linac. The equivalent dose in different organs is computed according to the face down position (prone) of MIRD and UFRO phantoms. The data obtained using MCNPX show that the received dose in all commons organs of MIRD and UFRO phantoms is 535.73 and 433.09 mSv/Gyx, respectively. The risks of second cancer incidence and mortality during radiotherapy treatment are compared between MIRD and UFRO phantoms. The results indicated that bladder has the maximum risk of secondary cancer incidence risk of 142.85 and 135.34 per 105 persons based on MIRD and UFRO phantoms, respectively; while the total risk is about 1 in 163 and about 1 in 101 in these phantoms.
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Vázquez-Bañuelos J, Campillo-Rivera GE, García-Duran Á, Rivera ER, Arteaga MV, Baltazar Raigosa A, Vega-Carrillo HR. Doses in eye lens, thyroid, and gonads, due to scattered radiation, during a CT radiodiagnosis study. Appl Radiat Isot 2019; 147:31-34. [PMID: 30798202 DOI: 10.1016/j.apradiso.2019.02.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Revised: 02/13/2019] [Accepted: 02/14/2019] [Indexed: 12/17/2022]
Abstract
X-ray images used for radio-diagnosis are very useful to evaluate the progress of a treatment or to have a better diagnosis. However, during the interaction between the incoming X-ray beam and the body surface, part of the radiation is scattered out reaching other parts of the body delivering an undesirable dose. In this work the dose in eye lenses, thyroid, and gonads of a solid water phantom was measured using thermoluminescent dosimeters, while a Computer Tomography of the torso was obtained. With the measured absorbed dose the effective dose was calculated. Thus, the effective dose in the eye lens, thyroid, and gonads is approximately 57, 214 and 9 μSv respectively. The largest effective dose was on that area located nearest to the region where the radiation is scattered.
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Affiliation(s)
- Joel Vázquez-Bañuelos
- Unidad Académica de Estudios Nucleares, Universidad Autónoma de Zacatecas, C. Ciprés 10, Fracc. La Peñuela, 98068, Zacatecas, Zac., Mexico
| | - Guillermo Eduardo Campillo-Rivera
- Unidad Académica de Estudios Nucleares, Universidad Autónoma de Zacatecas, C. Ciprés 10, Fracc. La Peñuela, 98068, Zacatecas, Zac., Mexico
| | - Ángel García-Duran
- Unidad Académica de Estudios Nucleares, Universidad Autónoma de Zacatecas, C. Ciprés 10, Fracc. La Peñuela, 98068, Zacatecas, Zac., Mexico
| | - Eric Reyes Rivera
- UNEME-Oncología, Av. Las Americas No. 8, Fracc. Campo Real, 98612, Guadalupe, Zac., Mexico
| | - Marcial Vásquez Arteaga
- Nuclear Physics Laboratory and Physics and Mathematics Postgraduate Unit, National University of Trujillo (UNT), Trujillo, Peru
| | - Antonio Baltazar Raigosa
- Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Académica de Ingeniería Eléctrica, Universidad Autonomía de Zacatecas, Av. López Velarde 801, Col. Centro, 98000, Zacatecas, Zac., Mexico
| | - Hector Rene Vega-Carrillo
- Unidad Académica de Estudios Nucleares, Universidad Autónoma de Zacatecas, C. Ciprés 10, Fracc. La Peñuela, 98068, Zacatecas, Zac., Mexico; Programa de Doctorado en Ingeniería y Tecnología Aplicada, Unidad Académica de Ingeniería Eléctrica, Universidad Autonomía de Zacatecas, Av. López Velarde 801, Col. Centro, 98000, Zacatecas, Zac., Mexico.
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