Eintrag weiter verarbeiten
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry
Gespeichert in:
| Zeitschriftentitel: | Medical Physics |
|---|---|
| Personen und Körperschaften: | , , , |
| In: | Medical Physics, 43, 2016, 6Part19, S. 3563-3563 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Wiley
|
| Schlagwörter: |
| author_facet |
Brost, E Senthilkumar, S Warmington, L Watanabe, Y Brost, E Senthilkumar, S Warmington, L Watanabe, Y |
|---|---|
| author |
Brost, E Senthilkumar, S Warmington, L Watanabe, Y |
| spellingShingle |
Brost, E Senthilkumar, S Warmington, L Watanabe, Y Medical Physics SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry General Medicine |
| author_sort |
brost, e |
| spelling |
Brost, E Senthilkumar, S Warmington, L Watanabe, Y 0094-2405 2473-4209 Wiley General Medicine http://dx.doi.org/10.1118/1.4956619 <jats:sec><jats:title>Purpose:</jats:title><jats:p>To design and construct a second generation optical computed tomography (OCT) system using a fan‐beam with a CMOS array detector for the 3D dosimetry with polymer gel and radiochromic solid dosimeters. The system was specifically designed for the small field dosimetry.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>The optical scanner used a fan‐beam laser, which was produced from a collimated red laser beam (λ=620 nm) with a 15‐degree laser‐line generating lens. The fan‐beam was sent through an index‐matching bath which holds the sample stage and a sample. The emerging laser light was detected with a 2.54 cm‐long CMOS array detector (512 elements). The sample stage rotated through the full 360 degree projection angles at 0.9‐degree increments. Each projection was normalized to the unirradiated sample at the projection angle to correct for imperfections in the dosimeter. A larger sample could be scanned by using a motorized mirror and linearly translating the CMOS detector. The height of the sample stage was varied for a full 3D scanning. The image acquisition and motor motion was controlled by a computer. The 3D image reconstruction was accomplished by a fan‐beam reconstruction algorithm. All the software was developed inhouse with MATLAB.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>The scanner was used on both PRESAGE and PAGAT gel dosimeters. Irreconcilable refraction errors were seen with PAGAT because the fan beam laser line refracted away from the detector when the field was highly varying in 3D. With PRESAGE, this type of error was not seen.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>We could acquire tomographic images of dose distributions by the new OCT system with both polymer gel and radiochromic solid dosimeters. Preliminary results showed that the system was more suited for radiochromic solid dosimeters since the radiochromic dosimeters exhibited minimal refraction and scattering errors. We are currently working on improving the image quality by thorough characterization of the OCT system.</jats:p></jats:sec> SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry Medical Physics |
| doi_str_mv |
10.1118/1.4956619 |
| facet_avail |
Online |
| format |
ElectronicArticle |
| fullrecord |
blob:ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTExOC8xLjQ5NTY2MTk |
| id |
ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTExOC8xLjQ5NTY2MTk |
| institution |
DE-Ch1 DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 |
| imprint |
Wiley, 2016 |
| imprint_str_mv |
Wiley, 2016 |
| issn |
0094-2405 2473-4209 |
| issn_str_mv |
0094-2405 2473-4209 |
| language |
English |
| mega_collection |
Wiley (CrossRef) |
| match_str |
brost2016suft434developmentofafanbeamopticalscannerusingcmosarrayforsmallfielddosimetry |
| publishDateSort |
2016 |
| publisher |
Wiley |
| recordtype |
ai |
| record_format |
ai |
| series |
Medical Physics |
| source_id |
49 |
| title |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_unstemmed |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_full |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_fullStr |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_full_unstemmed |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_short |
SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_sort |
su‐f‐t‐434: development of a fan‐beam optical scanner using cmos array for small field dosimetry |
| topic |
General Medicine |
| url |
http://dx.doi.org/10.1118/1.4956619 |
| publishDate |
2016 |
| physical |
3563-3563 |
| description |
<jats:sec><jats:title>Purpose:</jats:title><jats:p>To design and construct a second generation optical computed tomography (OCT) system using a fan‐beam with a CMOS array detector for the 3D dosimetry with polymer gel and radiochromic solid dosimeters. The system was specifically designed for the small field dosimetry.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>The optical scanner used a fan‐beam laser, which was produced from a collimated red laser beam (λ=620 nm) with a 15‐degree laser‐line generating lens. The fan‐beam was sent through an index‐matching bath which holds the sample stage and a sample. The emerging laser light was detected with a 2.54 cm‐long CMOS array detector (512 elements). The sample stage rotated through the full 360 degree projection angles at 0.9‐degree increments. Each projection was normalized to the unirradiated sample at the projection angle to correct for imperfections in the dosimeter. A larger sample could be scanned by using a motorized mirror and linearly translating the CMOS detector. The height of the sample stage was varied for a full 3D scanning. The image acquisition and motor motion was controlled by a computer. The 3D image reconstruction was accomplished by a fan‐beam reconstruction algorithm. All the software was developed inhouse with MATLAB.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>The scanner was used on both PRESAGE and PAGAT gel dosimeters. Irreconcilable refraction errors were seen with PAGAT because the fan beam laser line refracted away from the detector when the field was highly varying in 3D. With PRESAGE, this type of error was not seen.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>We could acquire tomographic images of dose distributions by the new OCT system with both polymer gel and radiochromic solid dosimeters. Preliminary results showed that the system was more suited for radiochromic solid dosimeters since the radiochromic dosimeters exhibited minimal refraction and scattering errors. We are currently working on improving the image quality by thorough characterization of the OCT system.</jats:p></jats:sec> |
| container_issue |
6Part19 |
| container_start_page |
3563 |
| container_title |
Medical Physics |
| container_volume |
43 |
| format_de105 |
Article, E-Article |
| format_de14 |
Article, E-Article |
| format_de15 |
Article, E-Article |
| format_de520 |
Article, E-Article |
| format_de540 |
Article, E-Article |
| format_dech1 |
Article, E-Article |
| format_ded117 |
Article, E-Article |
| format_degla1 |
E-Article |
| format_del152 |
Buch |
| format_del189 |
Article, E-Article |
| format_dezi4 |
Article |
| format_dezwi2 |
Article, E-Article |
| format_finc |
Article, E-Article |
| format_nrw |
Article, E-Article |
| _version_ |
1792334958258290702 |
| geogr_code |
not assigned |
| last_indexed |
2024-03-01T14:36:17.096Z |
| geogr_code_person |
not assigned |
| openURL |
url_ver=Z39.88-2004&ctx_ver=Z39.88-2004&ctx_enc=info%3Aofi%2Fenc%3AUTF-8&rfr_id=info%3Asid%2Fvufind.svn.sourceforge.net%3Agenerator&rft.title=SU%E2%80%90F%E2%80%90T%E2%80%90434%3A+Development+of+a+Fan%E2%80%90Beam+Optical+Scanner+Using+CMOS+Array+for+Small+Field+Dosimetry&rft.date=2016-06-01&genre=article&issn=2473-4209&volume=43&issue=6Part19&spage=3563&epage=3563&pages=3563-3563&jtitle=Medical+Physics&atitle=SU%E2%80%90F%E2%80%90T%E2%80%90434%3A+Development+of+a+Fan%E2%80%90Beam+Optical+Scanner+Using+CMOS+Array+for+Small+Field+Dosimetry&aulast=Watanabe&aufirst=Y&rft_id=info%3Adoi%2F10.1118%2F1.4956619&rft.language%5B0%5D=eng |
| SOLR | |
| _version_ | 1792334958258290702 |
| author | Brost, E, Senthilkumar, S, Warmington, L, Watanabe, Y |
| author_facet | Brost, E, Senthilkumar, S, Warmington, L, Watanabe, Y, Brost, E, Senthilkumar, S, Warmington, L, Watanabe, Y |
| author_sort | brost, e |
| container_issue | 6Part19 |
| container_start_page | 3563 |
| container_title | Medical Physics |
| container_volume | 43 |
| description | <jats:sec><jats:title>Purpose:</jats:title><jats:p>To design and construct a second generation optical computed tomography (OCT) system using a fan‐beam with a CMOS array detector for the 3D dosimetry with polymer gel and radiochromic solid dosimeters. The system was specifically designed for the small field dosimetry.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>The optical scanner used a fan‐beam laser, which was produced from a collimated red laser beam (λ=620 nm) with a 15‐degree laser‐line generating lens. The fan‐beam was sent through an index‐matching bath which holds the sample stage and a sample. The emerging laser light was detected with a 2.54 cm‐long CMOS array detector (512 elements). The sample stage rotated through the full 360 degree projection angles at 0.9‐degree increments. Each projection was normalized to the unirradiated sample at the projection angle to correct for imperfections in the dosimeter. A larger sample could be scanned by using a motorized mirror and linearly translating the CMOS detector. The height of the sample stage was varied for a full 3D scanning. The image acquisition and motor motion was controlled by a computer. The 3D image reconstruction was accomplished by a fan‐beam reconstruction algorithm. All the software was developed inhouse with MATLAB.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>The scanner was used on both PRESAGE and PAGAT gel dosimeters. Irreconcilable refraction errors were seen with PAGAT because the fan beam laser line refracted away from the detector when the field was highly varying in 3D. With PRESAGE, this type of error was not seen.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>We could acquire tomographic images of dose distributions by the new OCT system with both polymer gel and radiochromic solid dosimeters. Preliminary results showed that the system was more suited for radiochromic solid dosimeters since the radiochromic dosimeters exhibited minimal refraction and scattering errors. We are currently working on improving the image quality by thorough characterization of the OCT system.</jats:p></jats:sec> |
| doi_str_mv | 10.1118/1.4956619 |
| facet_avail | Online |
| format | ElectronicArticle |
| format_de105 | Article, E-Article |
| format_de14 | Article, E-Article |
| format_de15 | Article, E-Article |
| format_de520 | Article, E-Article |
| format_de540 | Article, E-Article |
| format_dech1 | Article, E-Article |
| format_ded117 | Article, E-Article |
| format_degla1 | E-Article |
| format_del152 | Buch |
| format_del189 | Article, E-Article |
| format_dezi4 | Article |
| format_dezwi2 | Article, E-Article |
| format_finc | Article, E-Article |
| format_nrw | Article, E-Article |
| geogr_code | not assigned |
| geogr_code_person | not assigned |
| id | ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuMTExOC8xLjQ5NTY2MTk |
| imprint | Wiley, 2016 |
| imprint_str_mv | Wiley, 2016 |
| institution | DE-Ch1, DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14 |
| issn | 0094-2405, 2473-4209 |
| issn_str_mv | 0094-2405, 2473-4209 |
| language | English |
| last_indexed | 2024-03-01T14:36:17.096Z |
| match_str | brost2016suft434developmentofafanbeamopticalscannerusingcmosarrayforsmallfielddosimetry |
| mega_collection | Wiley (CrossRef) |
| physical | 3563-3563 |
| publishDate | 2016 |
| publishDateSort | 2016 |
| publisher | Wiley |
| record_format | ai |
| recordtype | ai |
| series | Medical Physics |
| source_id | 49 |
| spelling | Brost, E Senthilkumar, S Warmington, L Watanabe, Y 0094-2405 2473-4209 Wiley General Medicine http://dx.doi.org/10.1118/1.4956619 <jats:sec><jats:title>Purpose:</jats:title><jats:p>To design and construct a second generation optical computed tomography (OCT) system using a fan‐beam with a CMOS array detector for the 3D dosimetry with polymer gel and radiochromic solid dosimeters. The system was specifically designed for the small field dosimetry.</jats:p></jats:sec><jats:sec><jats:title>Methods:</jats:title><jats:p>The optical scanner used a fan‐beam laser, which was produced from a collimated red laser beam (λ=620 nm) with a 15‐degree laser‐line generating lens. The fan‐beam was sent through an index‐matching bath which holds the sample stage and a sample. The emerging laser light was detected with a 2.54 cm‐long CMOS array detector (512 elements). The sample stage rotated through the full 360 degree projection angles at 0.9‐degree increments. Each projection was normalized to the unirradiated sample at the projection angle to correct for imperfections in the dosimeter. A larger sample could be scanned by using a motorized mirror and linearly translating the CMOS detector. The height of the sample stage was varied for a full 3D scanning. The image acquisition and motor motion was controlled by a computer. The 3D image reconstruction was accomplished by a fan‐beam reconstruction algorithm. All the software was developed inhouse with MATLAB.</jats:p></jats:sec><jats:sec><jats:title>Results:</jats:title><jats:p>The scanner was used on both PRESAGE and PAGAT gel dosimeters. Irreconcilable refraction errors were seen with PAGAT because the fan beam laser line refracted away from the detector when the field was highly varying in 3D. With PRESAGE, this type of error was not seen.</jats:p></jats:sec><jats:sec><jats:title>Conclusion:</jats:title><jats:p>We could acquire tomographic images of dose distributions by the new OCT system with both polymer gel and radiochromic solid dosimeters. Preliminary results showed that the system was more suited for radiochromic solid dosimeters since the radiochromic dosimeters exhibited minimal refraction and scattering errors. We are currently working on improving the image quality by thorough characterization of the OCT system.</jats:p></jats:sec> SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry Medical Physics |
| spellingShingle | Brost, E, Senthilkumar, S, Warmington, L, Watanabe, Y, Medical Physics, SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry, General Medicine |
| title | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_full | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_fullStr | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_full_unstemmed | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_short | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| title_sort | su‐f‐t‐434: development of a fan‐beam optical scanner using cmos array for small field dosimetry |
| title_unstemmed | SU‐F‐T‐434: Development of a Fan‐Beam Optical Scanner Using CMOS Array for Small Field Dosimetry |
| topic | General Medicine |
| url | http://dx.doi.org/10.1118/1.4956619 |