Lithuanian Journal of Physics article / Lietuvos fizikos žurnalo straipsnis

[PDF] http://dx.doi.org/10.3952/lithjphys.46208

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 46, 261–270 (2006)

EVALUATION OF SCATTERED RADIATION IN MAMMOGRAPHY EXAMINATION WITH Si DETECTOR
D. Adlienė^a and I. Cibulskaitė^a,b
^aKaunas University of Technology, Studentų 50, LT-51368 Kaunas, Lithuania
E-mail: diana.adliene@ktu.lt
^bKaunas Medical University Clinic, Eivenių 2, LT-50009 Kaunas, Lithuania
E-mail: onko@takas.lt

Received 9 December 2005

Monte Carlo simulations for interaction processes of low energy (23–25 keV) X-ray photons, which are commonly used in mammography examinations, are presented in this paper. The contribution of scattered radiation to the total dose is determined using scattering factor and the influence of scattered radiation for measurements with Si detector is investigated. Modelling results are compared with the results of experimental in vitro measurements using a phantom.

Keywords: scattered radiation, Compton scattering, glandular tissue dose, mammography, Monte Carlo method
PACS: 02.70.Uu , 29.40.Wk , 32.80.Cy

IŠSKLAIDYTOSIOS SPINDULIUOTĖS INDĖLIO VERTINIMAS MAMOGRAFINIAME TYRIME PANAUDOJANT Si DETEKTORIŲ
. D. Adlienė^a, I. Cibulskaitė^a,b
^aKauno technologijos universitetas, Kaunas, Lietuva
^bKauno medicinos universiteto klinikos, Kaunas, Lietuva

Pristatomi mažų energijos verčių (23–25 keV) Rentgeno fotonų, kokie naudojami mamografinių tyrimų metu, sąveikos su PMMA (polimetilmetakrilato) fantomu Monte Karlo modeliavimo rezultatai. Nustačius sklaidos koeficientus, vertinama sklaidos dėl Relėjaus (Rayleigh) ir Komptono (Compton) sąveikos įtaka apskaičiuotajai dozei. Monte Karlo modeliavimo rezultatai palyginami su eksperimentiniais duomenimis, gautais matuojant in vitro. Remiantis rezultatų analize, svarstoma galimybė naudoti Si detektorius dozėms medicininiame fantome įvertinti.

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