BACKSCATTERING AND TRANSMISSION THROUGH A HIGH-Z INTERFACE AS A MEASURE OF ELECTRON-BEAM ENERGY

被引：7

作者：

DAS, IJ ^{[1
]}

BUSHE, HS ^{[1
]}

机构：

[1] UNIV MASSACHUSETTS, MED CTR, DEPT RADIAT ONCOL, WORCESTER, MA 01655 USA

来源：

MEDICAL PHYSICS | 1994年 / 21卷 / 02期

关键词：

INTERFACE DOSIMETRY; ELECTRON BEAM; BACKSCATTER; TRANSMISSION; BEAM ENERGY; QUALITY ASSURANCE;

D O I：

10.1118/1.597375

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：

The ratio of electron beam transmission (Tr) and backscattering (Bs) is used as a measure of beam energy. With a proper thickness of high Z medium placed at the surface of a low Z homogeneous medium, it is observed that the function log(Tr/Bs) is a linear function of electron energy. This method is applied to electrons produced with scattering foil and pulse-Swept (scanned) beams for the nominal energies ranging from 6 to 20 MeV. This technique provides a unique alternative method which is easy, simple, and accurate within +/-3% for estimation of electron beam energy.

引用

页码：315 / 319

页数：5

共 24 条

[1] ENERGY CALIBRATION OF HIGH-ENERGY ELECTRONS USING A CERENKOV DETECTOR AND A COMPARISON WITH DIFFERENT METHODS [J].

ALMEIDA, CE ;

ALMOND, PR .

PHYSICS IN MEDICINE AND BIOLOGY, 1974, 19 (04) :476-483

[2] PHYSICAL MEASUREMENTS OF ELECTRON BEAMS FROM 6 TO 18 MEV - ABSORBED DOSE AND ENERGY CALIBRATION [J].

ALMOND, PR .

PHYSICS IN MEDICINE AND BIOLOGY, 1967, 12 (01) :13-&

[3] THE MASS ANGULAR SCATTERING POWER METHOD FOR DETERMINING THE KINETIC ENERGIES OF CLINICAL ELECTRON-BEAMS [J].

BLAIS, N ;

PODGORSAK, EB .

PHYSICS IN MEDICINE AND BIOLOGY, 1992, 37 (10) :1931-1942

[4]

BRAHME A, 1976, Medical Physics (Woodbury), V3, P95, DOI 10.1118/1.594210

[5] INTERFACE DOSE PERTURBATION AS A MEASURE OF MEGAVOLTAGE PHOTON-BEAM ENERGY [J].

DAS, IJ ;

KHAN, FM ;

GERBI, BJ .

MEDICAL PHYSICS, 1988, 15 (01) :78-81

[6]

DEASY J O, 1991, Medical Physics (Woodbury), V18, P621

[7]

Feldman A, 1974, Med Phys, V1, P74, DOI 10.1118/1.1637283

[8] ENERGY DETERMINATION FOR ELECTRON-BEAM CALIBRATION [J].

FREIM, JO ;

FELDMAN, A .

PHYSICS IN MEDICINE AND BIOLOGY, 1988, 33 (03) :361-365

[9]

GESKE G, 1990, Strahlentherapie und Onkologie, V166, P610

[10] USING ION CHAMBERS WITH WEDGE-SHAPED ABSORBERS FOR ELECTRON-ENERGY MEASUREMENTS [J].

JOHNSEN, SW .

MEDICAL PHYSICS, 1986, 13 (02) :257-258

← 1 2 3 →