Journal Article

DKFZ-2025-03046

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Monte Carlo simulation of a cabinet kilovoltage X-ray irradiator.

Theodoridou, E. (First author)DKFZ* ; Dong, R. (First author)DKFZ* ; King, C. (First author)DKFZ* ; Poludniowski, G. ; Häring, P.DKFZ* ; Hain, E.DKFZ* ; Litou, C.DKFZ* ; Voutou, E.DKFZ* ; Foka, P. ; Sammut, N. ; Seco, J. (Last author)DKFZ* ; Spadea, M. F.

2026
Elsevier Amsterdam

Abstract: We present a rigorously defined dosimetric Monte Carlo (MC) model of the MultiRad225 kilovoltage X-ray irradiator, which is validated using experimental techniques. Previous MC studies performed with the MultiRad225 lacked rigorous dosimetric validation.Experimental measurements are conducted with an ionization chamber and radiochromic film with beam energies of 119, 160, and 200 kV. MC simulations are conducted mimicking each experiment. Both beam quality (half-value layer, HVL) and quantity (dose rate) are assessed with these methods.MC simulated dose rates and HVL values show close agreement with experimental results across varying source-to-surface distances (SSD) for each beam energy with most dose rate simulations falling within 5% of the experimentally measured values.This work provides a validated MC model as a foundation for future studies with the MultiRad225. The MC model utilizes a comprehensive geometry which accurately captures relevant physical phenomena.

Keyword(s): Dosimetry ; Half-value layer (HVL) ; Kilovoltage X-ray irradiator ; Monte Carlo simulation

Note: #EA:E041#LA:E041# / Volume 141, January 2026, 105708 / Available online 22 December 2025

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Contributing Institute(s):

1. Med. Physik in der Radioonkologie (E041)

Research Program(s):

1. 315 - Bildgebung und Radioonkologie (POF4-315) (POF4-315)

Appears in the scientific report 2025

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Database coverage:
; Clarivate Analytics Master Journal List ; Current Contents - Clinical Medicine ; Essential Science Indicators ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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