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Titolo:
MEASUREMENTS OF THE ELECTRON DOSE DISTRIBUTION NEAR INHOMOGENEITIES USING A PLASTIC SCINTILLATION DETECTOR
Autore:
WELLS CMM; MACKIE TR; PODGORSAK MB; HOLMES MA; PAPANIKOLAOU N; RECKWERDT PJ; CYGLER J; ROGERS DWO; BIELAJEW AF; SCHMIDT DG; MUEHLENKAMP JK;
Indirizzi:
UNIV WISCONSIN,DEPT MED PHYS,1530 MED SCI CTR,1300 UNIV AVE MADISON WI 53706 OTTAWA REG CANC CTR OTTAWA K1Y 4K7 ON CANADA NATL RES COUNCIL CANADA OTTAWA ON CANADA RADIAT MEASUREMENTS INC MIDDLETON WI 53562
Titolo Testata:
International journal of radiation oncology, biology, physics
fascicolo: 5, volume: 29, anno: 1994,
pagine: 1157 - 1165
SICI:
0360-3016(1994)29:5<1157:MOTEDD>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENERGY BEAM DOSIMETRY; 2D;
Keywords:
SCINTILLATION DETECTOR; ELECTRON BEAM DOSIMETRY; INHOMOGENEITY; HETEROGENEITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
C.M.M. Wells et al., "MEASUREMENTS OF THE ELECTRON DOSE DISTRIBUTION NEAR INHOMOGENEITIES USING A PLASTIC SCINTILLATION DETECTOR", International journal of radiation oncology, biology, physics, 29(5), 1994, pp. 1157-1165

Abstract

Purpose: Accurate measurement of the electron dose distribution near an inhomogeneity is difficult with traditional dosimeters which themselves perturb the electron field. We tested the performance of a new high resolution, water-equivalent plastic scintillation detector which has ideal properties for this application. Methods and Materials: A plastic scintillation detector with a 1 mm diameter, 3 mm long cylindrical sensitive volume was used to measure the dose distributions behind standard benchmark inhomogeneities in water phantoms. The plastic scintillator material is more water equivalent than polystyrene in terms ofits mass collision stopping power and mass scattering power. Measurements were performed for beams of electrons having initial energies of 6 and 18 MeV at depths from 0.2-4.2 cm behind the inhomogeneities. Results: The detector reveals hot and cold spots behind heterogeneities at resolutions equivalent to typical film digitizer spot sizes. Plots of the dose distributions behind air, aluminum, lead, and formulations for cortical and inner bone-equivalent materials are presented. Conclusion: The plastic scintillation detector is suited for measuring the electron dose distribution near an inhomogeneity.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/10/20 alle ore 13:22:35