Assessment of dosimetrical performance in 11 Varian a-Si500 electronic portal imaging devices

Physics in Medicine and Biology

Volumn 53, Issue 23, 2008, Pages 6893-6909

  Kavuma, Awusi ^a,b   Glegg, Martin ^a   Currie, Garry ^a   Elliott, Alex ^a,b  

^a BEATSON WEST OF SCOTLAND CANCER CENTRE   (United Kingdom)

^b UNIVERSITY OF GLASGOW   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CONCURRENCY CONTROL; DETECTORS; DOSIMETERS; DOSIMETRY; LINEARIZATION; MERGERS AND ACQUISITIONS; SENSITIVITY ANALYSIS;

ACQUISITION SYSTEMS; CLINICAL USES; CONTROL SOFTWARE PACKAGES; DATA REPRODUCIBILITY; DETECTOR PANELS; DOSE RATES; ELECTRONIC PORTAL IMAGING DEVICES; FIELD SIZES; HIGH DEGREE OF ACCURACIES; IMAGE ACQUISITION SYSTEMS; IMAGE PROFILES; INSTALLATION DATES; MEASURED SIGNALS; MEMORY EFFECTS; MONITOR UNITS; PIXEL VALUES; RATE INFLUENCES; REFERENCE BEAMS; REPRODUCIBILITY; SIGNAL RESPONSES; SOFTWARE/HARDWARE; SUCCESSIVE IMAGES;

IMAGE ACQUISITION;

ARTICLE; COMPUTER PROGRAM; CONTROLLED STUDY; DOSIMETRY; HUMAN; IMAGE ANALYSIS; IMAGE RECONSTRUCTION; IONIZATION CHAMBER; PRIORITY JOURNAL;

DOSE-RESPONSE RELATIONSHIP, RADIATION; EQUIPMENT FAILURE ANALYSIS; PARTICLE ACCELERATORS; RADIOMETRY; RADIOTHERAPY DOSAGE; REPRODUCIBILITY OF RESULTS; SOFTWARE;

EID: 58149214092     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/53/23/016     Document Type: Article

References (33)

1. Berger L, François P, Gaboriaud G and Rosenwald J C 2006 Performance optimization of the Varian a-Si500 EPID system J. Appl. Clin. Med. Phys. 7 105-14
2. Chang J and Ling C C 2003 Using the frame averaging of a-Si500 EPID for IMRT verification J. Appl. Clin. Med. Phys. 4 287-99
3. Chen J, Chuang C F, Morin O, Aubi M and Pouliot J 2006 Calibration of an a-Si flat panal portal imager for exit-beam dosimetry Med. Phys. 33 584-94
4. Fowler J F and Attix F H 1966 Solid state integrating dosimeters Radiation Dosimetry vol 2 (NewYork: Academic) pp 241-90
5. Greer P B 2007 Off-axis dose response characteristics of an a-Si EPID Med. Phys. 34 3815-24
6. Greer P B and Barnes M P 2007 Investigation of an a-Si EPID for measurement and quality assurance of enhanced dynamic wedge Phys. Med. Biol. 52 1075-87
7. Greer P B and Popescu C C 2003 Dosimetric properties of an a-Si EPID for verification of dynamic IMRT Med. Phys. 30 1618-27
8. Hee J K, Gyuseong C, Tae H L and Young S K 2002 Comparative study on the radiation damage of a-Si:H p-i-n diodes made by PECVD and ion shower doping Nucl. Sci. IEEE 49 2244-9
9. Herman M G, Balter J M, Jaffray D A, McGee K P, Shalev S, Van Herk M and Wong J W 2001 Clinical use of electronic portal imaging: report of AAPM radiation therapy committee task group 58 Med. Phys. 28 712-37
10. McCurdy B M C, Luchka K and Pistorious S 2001 Dosimetric investigation and portal dose image prediction using an a-Si EPID Med. Phys. 28 911-24
11. McDermott L N, Louwe R J, Sonke J J, van Herk M B and Mijnheer B J 2004 Dose-response and ghosting effects of an a-Si EPID Med. Phys. 31 285-95
12. McDermott L N, Nijsten S M, Sonke J J, Partridge M, van Herk M and Mijnheer B J 2006 Comparison of ghosting effects for three commercial a-Si EPIDs Med. Phys. 33 2448-51
13. McGarry C K, Grattan M W D and Cosgrove V P 2007 Optimization of image quality and dose for Varian a-Si500 EPIDs Phys. Med. Biol. 52 6865-77
14. Menon G V and Sloboda R S 2004 Quality assurance measurements of a-Si EPID performance Med. Dosim. 29 11-7
15. Mohammadi M and Bezak E 2006 Two-dimensional transimited dose measurements using scanning liquid ionisation chambers EPID Phys. Med. Biol. 51 2971-85
16. Moore J A and Siebers J V 2005 Verification of the optimal backscatter for an a-Si EPID Phys. Med. Biol. 50 2341-50
17. Nijsten S M J J G, Mijnheer B J, Dekker A L A J, Lambin P and Minken A W H 2007 Routine individualized patient dosimetry using EPID Radiother. Oncol. 83 67-75
18. Pardo J, Franco L, Gomez F, Iglesias A, Pazoz A, Pena J, Mosquera J, Pombar M and Sendon J 2005 Development and operation of a pixel segmented liquid-filled linear array for radiotherapy quality assurance Phys. Med. Biol. 50 1703-16
19. Parent L, Fielding A, Dance D R, Seco J and Evans P M 2007 a-Si EPID calibration for dosimetric applications: comparison of a method based on Monte Carlo prediction of response with existing techniques Phys. Med. Biol. 52 3351-68
20. Parent L, Seco J, Evans P M, Dance D R and Fielding A 2006 Evaluation of two methods of predicting MLC leaf positions using EPID measurements Med. Phys. 33 3174-82
21. Pasma K L, Heijmen B J, Kroonwijk M and Visser A G 1998 Portal dose image (PDI) prediction for dosimetric treatment verification in radiotherapy. An algorithm for open beams Med. Phys. 25 830-40
22. Piermattei A et al 2007 Application of a practical method for the isocenter point in vivo dosimetry by a transit signal Phys. Med. Biol. 52 5101-17
23. Podgorsak E B 2005 Radiation dosimeters Radiation Oncology Physics: A Handbook for Teachers and Students ed J Izewska and G Rajan (Vienna: International Atomic Energy Agency) pp 71-99
24. Renner W D, Norton K and Holmes T 2005 A method for deconvolution of integrated electronic portal images to obtain fluence for dose reconstruction J. Appl. Clin. Med. Phys. 6 22-39
25. Steciw S, Warkentin B, Rathee S and Fallone B G 2005 Three-dimensional IMRT verification with a flat-panel EPID Med. Phys. 32 600-12
26. Van Elmpt W J C, Nijsten S M J J G, Schiffeleers R F H, Dekker A L A J, Mijnheer B J, Lambin P and Minken A W H 2006 A Monte Carlo based 3D dose reconstruction method derived from portal dose images Med. Phys. 33 2426-34
27. Van Esch A, Depuydt T and Huyskes D P 2004 The use of an aSi-based EPID for routine absolute dosimetry pre-treatment verification of dynamic IMRT fields Radiother. Oncol. 71 223-34
28. Vetterli D, Riem H, Aebersold D M, Greiner R H, Manser P, Cossmann P, Kemmerling L, Born E J and Mini R 2004 Introduction of a novel dose saving acquisition mode for the PortalVision a-Si500 EPID to facilitate on-line patient setup verification Med. Phys. 31 828-31
29. Vial P, Greer P B, Hunt P, Oliver L and Baldock C 2008 The impact of MLC transmitted radiation on EPID dosimetry for dMLC beams Med. Phys. 35 1267-77
30. Wendling M, Louwe R J W, McDermott L N, Sonke J J, Herk M V and Mijnheer B J 2006 Accurate 2D IMRT verification using a back-projection EPID dosimetry method Med. Phys. 33 259-73
31. Winkler P and George D 2006 An intercomparison of 11 a-Si EPIDs of the same type: implications for portal dosimetry Phys. Med. Biol. 51 4189-200
32. Winkler P, Hefner A and George D 2005 Dose-response characteristic of an a-Si EPID Med. Phys. 32 3095-105
33. Zijtveld M V, Dirkx M L P, DeBoer H C J and Heijmen B J M 2007 3D dose reconstruction for clinical evaluation of IMRT pre-treatment verification with an EPID Radiother. Oncol. 81 201-7