Measurement of in-air output ratios using different miniphantom materials

Physics in Medicine and Biology

Volumn 51, Issue 15, 2006, Pages 3819-3834

  Li, Jun ^a   Zhu, Timothy C ^a  

^a UNIVERSITY OF PENNSYLVANIA   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

ATTENUATION; COPPER; ENERGY ABSORPTION; GRAPHITE; LEAD; OPTICAL COLLIMATORS; PHOTONS; POLYMETHYL METHACRYLATES; X RAYS;

CORRECTION FACTOR; IN-AIR OUTPUT RATIO; MINIPHANTOM MATERIAL; PMMA;

BIOLOGICAL MATERIALS;

COPPER; GRAPHITE; LEAD;

ARTICLE; COLLIMATOR; ELECTRON; ENERGY ABSORPTION; GEOMETRY; MEASUREMENT; PHOTON; PRIORITY JOURNAL; RADIATION ATTENUATION; RADIATION ENERGY; X RAY;

AIR; PHANTOMS, IMAGING; PHOTONS; RADIOMETRY; RADIOTHERAPY DOSAGE; RADIOTHERAPY PLANNING, COMPUTER-ASSISTED; SCATTERING, RADIATION;

EID: 33746537729     PISSN: 00319155     EISSN: 13616560     Source Type: Journal    
DOI: 10.1088/0031-9155/51/15/015     Document Type: Article

References (17)

1. AAPM TG21 1983 A protocol for the determination of absorbed dose from high-energy photon and electron beams Med. Phys. 10 741-71
2. Bjärngard B E, Rashid H and Obcemea C H 1989 Separation of primary and scatter components of measured photon beam data Phys. Med. Biol. 34 1939-45
3. Bjärngard B E and Shackford H 1994 Attenuation in high-energy x-ray beams Med. Phys. 21 1069-73
4. Bjärngard B E and Siddon R 1982 A note on equivalent circles, squares, and rectangles Med. Phys. 9 258-60
5. Bjärngard B E and Vadash P 1998 Relations between scatter factor, quality index and attenuation for x-ray beams Phys. Med. Biol. 43 1325-30
6. Dutreix A, Bjärngard B E, Bridier A, Mijnheer B, Shaw J E and Svensson H 1997 Monitor Unit Calculation For High Energy Photon Beams (Leuven: Garant)
7. Frye D M, Paliwal B R, Thomadsen B R and Jursinic P 1995 Intercomparison of normalized head-scatter factor measurement techniques Med. Phys. 22 249-53
8. Johns H E and Cunningham J R 1983 The Physics of Radiology (Springfield, IL: C C Thomas)
9. Johnsson S, Ceberg C, Knöös T and Nilsson P 1999 Transmission measurements in air using the ESTRO mini-phantom Phys. Med. Biol. 44 2445-50
10. Jursinic P and Thomadsen B R 1999 Measurements of head-scatter factors with cylindrical build-up caps and columnar miniphantoms Med. Phys. 26 512-7
11. Li X A, Soubra M, Szanto J and Gerig L H 1995 Lateral electron equilibrium and electron contamination in measurements of head-scatter factors using miniphantoms and brass caps Med. Phys. 22 1167-70
12. Tomé W A and Palta J R 1998 On the calculation of mean restricted collision stopping powers Med. Phys. 25 758-72
13. van Gasteren J J M, Heukelom S, van Kleffens H J, van der Laarse R, Venselaar J L M and Westerman C F 1999 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
14. Venselaar J, Heukelom S, Jager N, Mijnheer B, van der Laarse R, van Gasteren H, van Kleffens H and Westermann C 1999 Effect of electron contamination on scatter correction factors for photon beam dosimetry Med. Phys. 26 2099-106
15. Weber L, Nilsson P and Ahnesjö A 1997 Build-up cap materials for measurement of photon head-scatter factors Phys. Med. Biol. 42 1875-86
16. Zhu T C and Bjärngard B E 1994 The head scatter factor for small fields Med. Phys. 21 65-8
17. Zhu T C, Bjärngard B E, Xiao Y and Yang C J 2001 Modeling the output ratio in air for megavoltage photon beams Med. Phys. 28 925-37