Photon beam quality correction factors for the NE2571A and NE2581A thimble ionization chambers using PENELOPE

Fast Monte Carlo codes for occupational dosimetry in interventional radiology

“…Monte Carlo simulations have been performed using the PENELOPE/ penEasy system [15,16] versions 2014 (PENELOPE) and 2018-04-30beta (penEasy), which has been extensively tested for dosimetry problems relevant for the present work [7,17,21,18]. The penEasy tally named 'energy deposition' was used to obtain the energy absorbed in the relevant spatial regions.…”

Computation of the electron beam qualitykQ,Q0factors for the NE2571, NE2571A and NE2581A thimble ionization chambers using PENELOPE

“…Details of the other two chambers considered, the NE2571A and the NE2581A, were provided by the manufacturer and are described in the work by Erazo and Lallena [15]. These are Farmer-type chambers with sensitive volumes of 0.69 and 0.56 cm 3 , respectively.…”

“…The simulations performed in the present work were carried out in a way similar to those of previous works [13][14][15], following the prescription of Sempau and Andreo [26] for the optimal values of the PENELOPE tracking parameters to simulate ionization chambers. Specifically, we used C 1 = C 2 = 0.02 for all materials of the ionization chamber and a water volume extending 2 cm around it.…”

“…The value of f c,Q may be obtained by Monte Carlo simulation provided an accurate geometrical description of the detector is available. Equation ( 1) was employed to evaluate the beam quality correction factor corresponding to various chambers irradiated with both photon and electron beams and using different Monte Carlo codes [4,[9][10][11][12][13][14][15][16]. The aim of the present work is to use the Monte Carlo code PENELOPE [17] to estimate k Q,Q 0 , in case of electrons beams, for three ionization chambers: the NE2571, permitting a comparison with the results of Muir and Rogers quoted above, and the NE2571A and the NE2581A thimble ionization chambers, both manufactured by QADOS (Sandhurst, UK).…”

A multicenter study of modified electron beam output calibration

“…This clarifies that the gradient corrections were implicitly calculated and included. Two studies by Erazo 13,14 provide Monte Carlo calculated data for cylindrical chambers and other studies 15,16 focused on the beam quality factor $${k}_{Q\ }$$calculated for parallel‐plate chambers. The systematic uncertainties in calculated beam quality conversion factors for the NE2571 chambers are less than 1.2% using conservative assumptions 11 .…”