Is there a need for a revised table of equivalent square fields for the determination of phantom scatter correction factors?

Physics in Medicine and Biology

Volumn 42, Issue 12, 1997, Pages 2369-2381

  Venselaar, J L M ^a   Heukelom, S ^b   Jager, H N ^c   Mijnheer, B J ^d   Van Gasteren, J J M ^e   Van Kleffens, H J ^f   Van der Laarse, R ^e   Westermann, C F ^g  

^a DR BERNARD VERBEETEN INSTITUTE   (Netherlands)

^b VU UNIVERSITY MEDICAL CENTER   (Netherlands)

^c MEDISCH SPECTRUM TWENTE   (Netherlands)

^d NETHERLANDS CANCER INSTITUTE   (Netherlands)

^e Nucletron BV   (Netherlands)

^f UNIVERSITY MEDICAL CENTER UTRECHT   (Netherlands)

^g MEDICAL CENTER HAAGLANDEN   (Netherlands)

Author keywords

[No Author keywords available]

Indexed keywords

ARTICLE; COLLIMATOR; DOSIMETRY; MEGAVOLTAGE RADIATION; PHANTOM; PHOTON; PRIORITY JOURNAL; RADIATION DEPTH DOSE; RADIATION FIELD; RADIATION SCATTERING;

EID: 0031469794     PISSN: 00319155     EISSN: None     Source Type: Journal    
DOI: 10.1088/0031-9155/42/12/005     Document Type: Article

References (22)

1. Aldrich J E and Andrew J W 1985 Characteristics of the photon beam from a new 25 MV linear accelerator Med. Phys. 12 619-24
2. Asp L W 1980 On equivalent square fields Br. J. Radiol. 53 485-7
3. Bjärngard B E and Siddon R L 1982 A note on equivalent circles, squares and rectangles Med. Phys. 9 258-60
4. Burns J E, Perry B J, Pierce N H, Trotman R E and Wilson C W 1959 A kilocurie caesium 137 beam unit at Westminster Hospital: physical aspects Br. J. Radiol. 32 215-23
5. Chen F S 1990 Applying a polynomial formula to photon output and equivalent square field Med. Phys. 6 464-9
6. Day M J and Aird E G A 1983 The equivalent-field method for dose determinations in rectangular fields Br. J. Radiol. suppl 17 (London: BIR) pp 105-14
7. _ 1996 The equivalent field method for dose determinations in rectangular fields Br. J. Radiol. suppl 25 (London: BIR) pp 138-51
8. Day M J, Aird E G A and Shakoor Y 1981 New applications of the concept of equivalent field to the dosimetry of external beam radiotherapy with wedged and unwedged fields Proc. Int. Conf. Radiol. (Brussels)
9. Garbi B J 1991 A mathematical expression for % DD accurate from Co-60 to 24 MV Med. Phys. 18 724-6
10. Jager H N, Heukelom S, van Kleffens H J, van Gasteren J J M, van der Laarse R, Venselaar J L M and Westermann C F 1997 The collimator scatter correction factor of open, symmetrical fields of 6-25 MV photon beams Radiother. Oncol. at press
11. Jones D E A 1949 A note on back-scatter and depth dose for elongated rectangular x-ray fields Br. J. Radiol. 22 342-5
12. Kahn F M 1994 The Physics of Radiation Therapy 2nd edn (Baltimore, MD: Williams and Wilkins)
13. Kemp L A W and Burns J E 1958 Physical measurements on the London Hospital Picker C3000 cobalt unit Acta Radiol. 49 471-84
14. Mijnheer B J, Battermann J J and Wambersie A 1987 What degree of accuracy is required and can be achieved in photon and neutron therapy? Radiother. Oncol. 8 237-52
15. Netherlands Commission on Radiation Dosimetry 1998 Determination and use of scatter correction factors of megavoltage x-ray beams: measurement and use of collimator and phantom scatter correction factors of arbitrarily shaped fields with symmetrical collimator setting NCS Report 12 (Delft: NCS) at press
16. Patomäki L K 1968 The equivalent fluid principle and its use in beam therapy dose calculations Br. J. Radiol. 15 381-3
17. Storchi P and van Gasteren J J M 1996 A table of phantom scatter factors of photon beams as a function of the quality index and field size Phys. Med. Biol. 41 563-71
18. Tatcher M and Bjärngard B E 1993 Equivalent squares of irregular photon fields Med. Phys. 20 1229-32
19. Vadash P and Bjärngard B E 1993 An equivalent-square method for head scatter factors Med. Phys. 20 733-4
20. Van Gasteren J J M, Heukelom S, Jager H N, van Kleffens H J, van der Laarse R, Mijnheer B J, Venselaar J L M and Westermann C F 1995 Comments on 'Intercomparison of normalized head-scatter factor measurement techniques' Med. Phys. 22 1473
21. Van Gasteren J J M, Heukelom S, Jager H N, van Kleffens H J, van der Laarse R, Venselaar J L M and Westermann C F 1998 A 3-Gaussian fit of phantom scatter correction data Phys. Med. Biol. at press
22. Van Gasteren J J M, Heukelom S, van Kleffens H J, van der Laarse R, Venselaar J L M and Westermann C F 1991 The determination of phantom and collimator scatter components of the output of megavoltage photon beams: measurement of the collimator scatter part with a beam-coaxial narrow cylindrical phantom Radiother. Oncol. 20 250-7