Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy
A Monte Carlo simulation was used to study imaging and dosimetric characteristics of a novel design of megavoltage (MV) X-ray detectors for radiotherapy applications. The new design uses Cerenkov effect to convert X-ray energy absorbed in optical fibres into light for MV X-ray imaging. The proposed...
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| Format: | Article |
| Language: | English |
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Wiley
2012-01-01
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| Series: | International Journal of Optics |
| Online Access: | http://dx.doi.org/10.1155/2012/724024 |
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| author | A. Teymurazyan G. Pang |
| author_facet | A. Teymurazyan G. Pang |
| author_sort | A. Teymurazyan |
| collection | DOAJ |
| description | A Monte Carlo simulation was used to study imaging and dosimetric characteristics of a novel design of megavoltage (MV) X-ray detectors for radiotherapy applications. The new design uses Cerenkov effect to convert X-ray energy absorbed in optical fibres into light for MV X-ray imaging. The proposed detector consists of a matrix of optical fibres aligned with the incident X rays and coupled to an active matrix flat-panel imager (AMFPI) for image readout. Properties, such as modulation transfer function, detection quantum efficiency (DQE), and energy response of the detector, were investigated. It has been shown that the proposed detector can have a zero-frequency DQE more than an order of magnitude higher than that of current electronic portal imaging device (EPID) systems and yet a spatial resolution comparable to that of video-based EPIDs. The proposed detector is also less sensitive to scattered X rays from patients than current EPIDs. |
| format | Article |
| id | doaj-art-3377ecdc3a084fb4a1110dbb878dc3f4 |
| institution | OA Journals |
| issn | 1687-9384 1687-9392 |
| language | English |
| publishDate | 2012-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Optics |
| spelling | doaj-art-3377ecdc3a084fb4a1110dbb878dc3f42025-08-20T02:24:17ZengWileyInternational Journal of Optics1687-93841687-93922012-01-01201210.1155/2012/724024724024Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation TherapyA. Teymurazyan0G. Pang1Imaging Research, Sunnybrook Health Sciences Centre and Department of Medical Biophysics, University of Toronto, Toronto, ON, M4N 3M5, CanadaImaging Research, Sunnybrook Health Sciences Centre and Department of Medical Biophysics, University of Toronto, Toronto, ON, M4N 3M5, CanadaA Monte Carlo simulation was used to study imaging and dosimetric characteristics of a novel design of megavoltage (MV) X-ray detectors for radiotherapy applications. The new design uses Cerenkov effect to convert X-ray energy absorbed in optical fibres into light for MV X-ray imaging. The proposed detector consists of a matrix of optical fibres aligned with the incident X rays and coupled to an active matrix flat-panel imager (AMFPI) for image readout. Properties, such as modulation transfer function, detection quantum efficiency (DQE), and energy response of the detector, were investigated. It has been shown that the proposed detector can have a zero-frequency DQE more than an order of magnitude higher than that of current electronic portal imaging device (EPID) systems and yet a spatial resolution comparable to that of video-based EPIDs. The proposed detector is also less sensitive to scattered X rays from patients than current EPIDs.http://dx.doi.org/10.1155/2012/724024 |
| spellingShingle | A. Teymurazyan G. Pang Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy International Journal of Optics |
| title | Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy |
| title_full | Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy |
| title_fullStr | Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy |
| title_full_unstemmed | Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy |
| title_short | Megavoltage X-Ray Imaging Based on Cerenkov Effect: A New Application of Optical Fibres to Radiation Therapy |
| title_sort | megavoltage x ray imaging based on cerenkov effect a new application of optical fibres to radiation therapy |
| url | http://dx.doi.org/10.1155/2012/724024 |
| work_keys_str_mv | AT ateymurazyan megavoltagexrayimagingbasedoncerenkoveffectanewapplicationofopticalfibrestoradiationtherapy AT gpang megavoltagexrayimagingbasedoncerenkoveffectanewapplicationofopticalfibrestoradiationtherapy |