Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam
Because of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. Fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (ATs). In this study, the effect of maternal AT...
| Main Authors: | , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wolters Kluwer Medknow Publications
2013-01-01
|
| Series: | Journal of Medical Signals and Sensors |
| Subjects: | |
| Online Access: | http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2013;volume=3;issue=1;spage=31;epage=36;aulast=Atarod |
| _version_ | 1818302783274614784 |
|---|---|
| author | Maryam Atarod Parvaneh Shokrani |
| author_facet | Maryam Atarod Parvaneh Shokrani |
| author_sort | Maryam Atarod |
| collection | DOAJ |
| description | Because of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. Fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (ATs). In this study, the effect of maternal AT and depth in fetal dosimetry was investigated, using peripheral dose (PD) distribution evaluations. A BEAMnrc model of Oncor linac using out of beam components was used for dose calculations in out of field border. A 6 MV photon beam was used to irradiate a chest phantom. Measurements were done using EBT2 radiochromic film in a RW3 phantom as abdomen. The followings were measured for different ATs: Depth PD profiles at two distances from the field′s edge, and in-plane PD profiles at two depths. The results of this study show that PD is depth dependent near the field′s edge. The increase in AT does not change PD depth of maximum and its distribution as a function of distance from the field′s edge. It is concluded that estimating the maximum fetal dose, using a flat phantom, i.e., without taking into account the AT, is possible. Furthermore, an in-plane profile measured at any depth can represent the dose variation as a function of distance. However, in order to estimate the maximum PD the depth of Dmax in out of field should be used for in-plane profile measurement. |
| first_indexed | 2024-12-13T05:44:23Z |
| format | Article |
| id | doaj.art-7a91adae2e8944a4b5f6d0d266c14596 |
| institution | Directory Open Access Journal |
| issn | 2228-7477 |
| language | English |
| last_indexed | 2024-12-13T05:44:23Z |
| publishDate | 2013-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Medical Signals and Sensors |
| spelling | doaj.art-7a91adae2e8944a4b5f6d0d266c145962022-12-21T23:57:43ZengWolters Kluwer Medknow PublicationsJournal of Medical Signals and Sensors2228-74772013-01-01313136Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon BeamMaryam AtarodParvaneh ShokraniBecause of the adverse effects of ionizing radiation on fetuses, prior to radiotherapy of pregnant patients, fetal dose should be estimated. Fetal dose has been studied by several authors in different depths in phantoms with various abdomen thicknesses (ATs). In this study, the effect of maternal AT and depth in fetal dosimetry was investigated, using peripheral dose (PD) distribution evaluations. A BEAMnrc model of Oncor linac using out of beam components was used for dose calculations in out of field border. A 6 MV photon beam was used to irradiate a chest phantom. Measurements were done using EBT2 radiochromic film in a RW3 phantom as abdomen. The followings were measured for different ATs: Depth PD profiles at two distances from the field′s edge, and in-plane PD profiles at two depths. The results of this study show that PD is depth dependent near the field′s edge. The increase in AT does not change PD depth of maximum and its distribution as a function of distance from the field′s edge. It is concluded that estimating the maximum fetal dose, using a flat phantom, i.e., without taking into account the AT, is possible. Furthermore, an in-plane profile measured at any depth can represent the dose variation as a function of distance. However, in order to estimate the maximum PD the depth of Dmax in out of field should be used for in-plane profile measurement.http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2013;volume=3;issue=1;spage=31;epage=36;aulast=AtarodFetal dosimetryMonte Carloperipheral doseradiotherapy |
| spellingShingle | Maryam Atarod Parvaneh Shokrani Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam Journal of Medical Signals and Sensors Fetal dosimetry Monte Carlo peripheral dose radiotherapy |
| title | Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam |
| title_full | Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam |
| title_fullStr | Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam |
| title_full_unstemmed | Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam |
| title_short | Monte Carlo Study of Fetal Dosimetry Parameters for 6 MV Photon Beam |
| title_sort | monte carlo study of fetal dosimetry parameters for 6 mv photon beam |
| topic | Fetal dosimetry Monte Carlo peripheral dose radiotherapy |
| url | http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2013;volume=3;issue=1;spage=31;epage=36;aulast=Atarod |
| work_keys_str_mv | AT maryamatarod montecarlostudyoffetaldosimetryparametersfor6mvphotonbeam AT parvanehshokrani montecarlostudyoffetaldosimetryparametersfor6mvphotonbeam |