Extrapolated surface dose measurements with radiochromic film

被引：35

作者：

Butson, MJ ^{[1
]}

Yu, PKN

Metcalfe, PE

机构：

[1] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon Tong, Peoples R China

[2] Illawarra Canc Care Ctr, Dept Med Phys, Wollongong, NSW 2500, Australia

来源：

MEDICAL PHYSICS | 1999年 / 26卷 / 03期

关键词：

radiochromic film; Gafchromic; surface dose; extrapolation method;

D O I：

10.1118/1.598539

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

A radiochromic film extrapolation method is described for the measurement of surface dose from high energy photon beams. Extrapolated central axis entrance surface dose using Gafchromic film for a 10 x 10 cm(2) field size is 15% +/- 2% and 13% +/- 2% of D-max for 6 and 10 MV x rays, respectively. Extrapolated surface dose for a 30 X 30 cm(2) field with a 10 mm perspex block tray is 49% +/- 2% and 48% +/- 2% of D-max for 6 and 10 MV beams, respectively. All results agree with uncorrected Attix parallel plate ionization chamber surface ionization within 4% for the same beam energies and configurations. (C) 1999 American Association of Physicists in Medicine. [S0094-2405(99)01902-1].

引用

页码：485 / 488

页数：4

共 16 条

[1]

BUTSON M, IN PRESS PHYS MED BI

[2]

Butson Martin J., 1996, Australasian Physical and Engineering Sciences in Medicine, V19, P74

[3] Radiochromic film as a radiotherapy surface-dose detector [J].

Butson, MJ ;

Mathur, JN ;

Metcalfe, PE .

PHYSICS IN MEDICINE AND BIOLOGY, 1996, 41 (06) :1073-1078

[4]

CAROLAN M, 1997, AUST PHYS ENG SCI ME, V20

[5] DOSE BUILDUP FOR OBLIQUELY INCIDENT PHOTON BEAMS [J].

GERBI, BJ ;

MEIGOONI, AS ;

KHAN, FM .

MEDICAL PHYSICS, 1987, 14 (03) :393-399

[6] MEASUREMENT OF DOSE IN THE BUILDUP REGION USING FIXED-SEPARATION PLANE-PARALLEL IONIZATION CHAMBERS [J].

GERBI, BJ ;

KHAN, FM .

MEDICAL PHYSICS, 1990, 17 (01) :17-26

[7] GafChromic MD-55: Investigated as a precision dosimeter [J].

Klassen, NV ;

van der Zwan, L ;

Cygler, J .

MEDICAL PHYSICS, 1997, 24 (12) :1924-1934

[8] ENTRANCE AND EXIT DOSE REGIONS FOR A CLINAC-2100C [J].

KLEIN, EE ;

PURDY, JA .

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS, 1993, 27 (02) :429-435

[9] X-RAY SURFACE DOSE MEASUREMENTS USING TLD EXTRAPOLATION [J].

KRON, T ;

ELLIOT, A ;

WONG, T ;

SHOWELL, G ;

CLUBB, B ;

METCALFE, P .

MEDICAL PHYSICS, 1993, 20 (03) :703-711

[10] SENSITOMETRY OF THE RESPONSE OF A NEW RADIOCHROMIC FILM DOSIMETER TO GAMMA-RADIATION AND ELECTRON-BEAMS [J].

MCLAUGHLIN, WL ;

YUNDONG, C ;

SOARES, CG ;

MILLER, A ;

VANDYK, G ;

LEWIS, DF .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1991, 302 (01) :165-176

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