The characterization of unflattened photon beams from a 6 MV linear accelerator

Physics in Medicine and Biology

Volumn 53, Issue 7, 2008, Pages 1933-1946

  Cashmore, Jason ^a  

^a UNIVERSITY HOSPITALS BIRMINGHAM NHS FOUNDATION TRUST   (United Kingdom)

Author keywords

[No Author keywords available]

Indexed keywords

CHARACTERIZATION; DOSIMETRY; LINEAR ACCELERATORS; RADIATION EFFECTS; RADIOTHERAPY;

COMMISSIONING DATA; FLATTENING FILTER REMOVAL; LEAKAGE RADIATION; PHOTON BEAMS;

PHOTONS;

ACCURACY; ARTICLE; CALCULATION; DOSIMETRY; FILTER; INTENSITY MODULATED RADIATION THERAPY; LINEAR ACCELERATOR; MACHINE; MEASUREMENT; PHOTON THERAPY; PRIORITY JOURNAL; RADIATION DOSE; RADIATION SCATTERING; TREATMENT PLANNING;

EID: 42449146199     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/53/7/009     Document Type: Article

References (29)

1. Bruggmoser G, Saum R, Schmachtenberg A, Schmid F and Schüle E 2007 Determination of the recombination correction factor kS for some specific plane-parallel and cylindrical ionization chambers in pulsed photon and electron beams Phys. Med. Biol. 52 N35-50
2. BS EN 60976 2001 Medical electrical equipment-Medical electron accelerators-Functional performance characteristics
3. CMS XiO 2003 Beam Data Collection List DOC:9000-959-24H
4. Derikum K and Roos M 1993 Measurement of saturation correction factors of thimble-type ionization chambers in pulsed photon beams Phys. Med. Biol 38 755-63
5. Elekta 2005 Customer Acceptance Tests Doc 4513 370 2065 04
6. Fu W, Dai J, Hu Y, Han D and Song Y 2004 Delivery time comparison for intensity-modulated radiation therapy with/without flattening filter: a planning study Phys. Med. Biol 49 1535-47
7. Hounsell A R and Wilkinson J M 1997 Head scatter modelling for irregular field shaping and beam intensity modulation Phys. Med. Biol 42 1737-49
8. Hounsell A R and Wilkinson J M 1999 Electron contamination and build-up doses in conformal radiotherapy fields Phys. Med. Biol 44 43-55
9. Jiang S B, Boyer Al and Ma C 2001 Modelling the extra focal radiation and monitor chamber backscatter for photon beam dose calculation Med. Phys 18 55-66
10. Jordan T J 1996 Central axis depth dose data for use in radiotherapy Br. J. Radiol. (Suppl. 25) 72
11. Karzmark C J, Nunan C S and Tanabe E 1993 Medical Electron Accelerators (New York: McGraw-Hill) p 127
12. Klein E E, Esthappan J and Li Z 2003 Surface and buildup dose characteristics for 6, 10, and 18 MV photons from an Elekta Precise linear accelerator J. Appl. Clin. Med. Phys. 4 1-7
13. Lam K L, Muthuswamy M S and Tan Haken R K 1996 Flattening filter based empirical methods to parameterise the head scatter factor Med. Phys. 23 343-52
14. Mesbahi A 2007 Dosimetric characteristics of unflattened 6 MV photon beams of a clinical linear accelerator: a Monte Carlo study Appl. Radiat. Isot. 65 1029-36
15. Nilsson B 1985 Electron contamination from different materials in high energy photon beams Phys. Med. Biol. 30 139-51
16. Petti P L, Goodman M S, Gabriel T A and Mohan R 1983 Investigation of buildup dose from electron contamination of clinical photon beams Med. Phys 10 18-24
17. Ponisch F, Titt U, Vassiliev O N, Kry S F and Mohan R 2006 Properties of unflattened photon beams shaped by a multileaf collimator Med. Phys 33 1738-46
18. Rasband W 2006 ImageJ 1.36b (USA: National Institutes of Health) http://rsb.info.nih.gov/ij
19. Redpath A T 2005 Modelling of output factors for conformal megavoltage x-ray beams Br. J. Radiol. 78 612-22
20. Sharpe M B, Miller M B, Yan D and Wong J W 2000 Monitor unit settings for intensity modulated beams delivered using a step-and-shoot approach Med. Phys 27 2719-25
21. Sikora M, Dohm O and Alber M 2007 A virtual photon source model of an Elekta linear accelerator with integrated mini MLC for Monte Carlo based IMRT dose calculation Phys. Med. Biol. 52 4449-63
22. Titt U, Vassiliev O N, Ponisch F, Dong L, Liu H and Mohan R 2006a A flattening filter free photon treatment concept evaluation with Monte Carlo Med. Phys 33 1595-602
23. Titt U, Vassiliev O N, Ponisch F, Kry S F and Mohan R 2006b Monte Carlo study of backscatter in a flattening filter free clinical accelerator Med. Phys 33 3270-3
24. Tsechanski A, Krutman Y and Faermann S 2005 On the existence of low-energy photons (<150 keV) in the unflattened x-ray beam from an ordinary radiotherapeutic target in a medical linear accelerator Phys. Med. Biol 50 5629-39
25. Vassiliev O N, Titt U, Kry S F, Ponisch F, Gillin M T and Mohan R 2006a Monte Carlo study of photon fields from a flattening filter-free clinical accelerator Med. Phys. 33 820-7
26. Vassiliev O N, Titt U, Ponisch F, Kry S F, Mohan R and Gillin M T 2006b Dosimetric properties of photon beams from a flattening filter free clinical accelerator Phys. Med. Biol. 51 1907-17
27. Zhu T C and Bjärngard B E 1995 The fraction of photons undergoing head scatter in x-ray beams Phys. Med. Biol. 40 1127-34
28. Zhu T C and Bjärngard B E 2003 Head scatter off-axis for megavoltage x rays Med. Phys. 30 533-43
29. Zhu X R, Kang Y and Gillin M T 2006 Measurements of in-air output ratios for a linear accelerator with and without the flattening filter Med. Phys. 33 3723-33