Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry
Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present study evaluates improvements of dosimetric pr...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wolters Kluwer Medknow Publications
2017-01-01
|
| Series: | Journal of Medical Signals and Sensors |
| Subjects: | |
| Online Access: | http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2017;volume=7;issue=1;spage=21;epage=25;aulast=Nazari |
| _version_ | 1818407432434483200 |
|---|---|
| author | Vahideh Nazari Seied R Mahdavi Ahmad Mostaar Hassan Nedaei Mohammad A Mosleh Shirazi Alireza Nikoofar Golbarg Esmailie |
| author_facet | Vahideh Nazari Seied R Mahdavi Ahmad Mostaar Hassan Nedaei Mohammad A Mosleh Shirazi Alireza Nikoofar Golbarg Esmailie |
| author_sort | Vahideh Nazari |
| collection | DOAJ |
| description | Dosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present study evaluates improvements of dosimetric properties of the low elbow camera-based EPID Theraview (Cablon Medical, Leusden, The Netherlands) equipped with a cooled charge coupled device (CCD) for portal dosimetry. The dose response, warm-up behavior, stability over long- and short-term scales (throughout a day) were studied. The field size dependency of the EPID response was also investigated and compared with ion chamber measurements under the same conditions. The EPID response without saturation for doses up to 2 Gy was linear for both beam qualities (6 and 15 MV). There was no evident warm-up characteristic. The detector sensitivity showed excellent stability in short term [standard deviation (SD) 0.38%]. In long-term stability (over a period of approximately 3 months), a negligible linear decline of 0.01% per day was observed. It was concluded that the cooled CCD camera-based EPID could be used for portal dosimetry, after accurate corrections for the field size dependency and sensitivity loss. |
| first_indexed | 2024-12-14T09:27:45Z |
| format | Article |
| id | doaj.art-9cb0496f91104c1ab1d8a9ce0496a705 |
| institution | Directory Open Access Journal |
| issn | 2228-7477 |
| language | English |
| last_indexed | 2024-12-14T09:27:45Z |
| publishDate | 2017-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Journal of Medical Signals and Sensors |
| spelling | doaj.art-9cb0496f91104c1ab1d8a9ce0496a7052022-12-21T23:08:09ZengWolters Kluwer Medknow PublicationsJournal of Medical Signals and Sensors2228-74772017-01-01712125Multi-parametric Improvements in the CCD Camera-based EPID for Portal DosimetryVahideh NazariSeied R MahdaviAhmad MostaarHassan NedaeiMohammad A Mosleh ShiraziAlireza NikoofarGolbarg EsmailieDosimetric verification of radiation treatment has recently been extended by the introduction of electronic portal imaging devices (EPIDs). Detailed dose response specifications of EPID should be addressed prior to any dosimetric application. The present study evaluates improvements of dosimetric properties of the low elbow camera-based EPID Theraview (Cablon Medical, Leusden, The Netherlands) equipped with a cooled charge coupled device (CCD) for portal dosimetry. The dose response, warm-up behavior, stability over long- and short-term scales (throughout a day) were studied. The field size dependency of the EPID response was also investigated and compared with ion chamber measurements under the same conditions. The EPID response without saturation for doses up to 2 Gy was linear for both beam qualities (6 and 15 MV). There was no evident warm-up characteristic. The detector sensitivity showed excellent stability in short term [standard deviation (SD) 0.38%]. In long-term stability (over a period of approximately 3 months), a negligible linear decline of 0.01% per day was observed. It was concluded that the cooled CCD camera-based EPID could be used for portal dosimetry, after accurate corrections for the field size dependency and sensitivity loss.http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2017;volume=7;issue=1;spage=21;epage=25;aulast=NazariElectronic portal imaging deviceselbowportal dosimetryradiometry |
| spellingShingle | Vahideh Nazari Seied R Mahdavi Ahmad Mostaar Hassan Nedaei Mohammad A Mosleh Shirazi Alireza Nikoofar Golbarg Esmailie Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry Journal of Medical Signals and Sensors Electronic portal imaging devices elbow portal dosimetry radiometry |
| title | Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry |
| title_full | Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry |
| title_fullStr | Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry |
| title_full_unstemmed | Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry |
| title_short | Multi-parametric Improvements in the CCD Camera-based EPID for Portal Dosimetry |
| title_sort | multi parametric improvements in the ccd camera based epid for portal dosimetry |
| topic | Electronic portal imaging devices elbow portal dosimetry radiometry |
| url | http://www.jmss.mui.ac.ir/article.asp?issn=2228-7477;year=2017;volume=7;issue=1;spage=21;epage=25;aulast=Nazari |
| work_keys_str_mv | AT vahidehnazari multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT seiedrmahdavi multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT ahmadmostaar multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT hassannedaei multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT mohammadamoslehshirazi multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT alirezanikoofar multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry AT golbargesmailie multiparametricimprovementsintheccdcamerabasedepidforportaldosimetry |