Results 1 to 10 of about 1,765 (182)

Enhancement of the EGSnrc code egs_chamber for fast fluence calculations of charged particles

Zeitschrift Fur Medizinische Physik, 2022
Purpose: Simulation of absorbed dose deposition in a detector is one of the key tasks of Monte Carlo (MC) dosimetry methodology. Recent publications (Hartmann and Zink, 2018; Hartmann and Zink, 2019; Hartmann et al., 2021) have shown that knowledge of ...
Klemens Zink, Günther H Hartmann, Boris Keil   +2 more
exaly   +6 more sources

A Monte Carlo based dose verification tool for an HDR Ir-192 brachytherapy source and its evaluation on extremity malignancies. [PDF]

J Appl Clin Med Phys
Abstract Background TG‐43 formalism dose calculation for brachytherapy with the homogeneous water‐based assumption is widely used, which can lead to dose inaccuracy in treatment planning. Purpose Extremity malignancies are also treated with high‐dose‐rate (HDR) 192Ir interstitial brachytherapy, a treatment site that has not been specifically ...
Li P, Kong CW, Zhang R, Zhou D, Huang C, Chiu TL, Nam PH, Yung CT, Chang TY, Yu SK, Yang B.   +10 more
europepmc   +2 more sources

Macro Monte Carlo dose calculation for very high energy electron (VHEE) radiotherapy. [PDF]

Med Phys
Abstract Background Very high energy electron (VHEE) radiotherapy has gained growing interest owing to its potential to reach deep‐seated targets and induce FLASH effect. Dose calculations can be performed using analytical or Monte Carlo (MC) methods. Analytical approaches enable rapid dose computation but suffer from limited accuracy in heterogeneous ...
Zhu C, Amstutz F, Costantini CM, Volken W, Stampanoni MFM, Manser P, Fix MK.   +6 more
europepmc   +2 more sources

Advancing iris melanoma brachytherapy: Eye plaque models for Monte Carlo simulations and 3D dosimetric datasets. [PDF]

Med Phys
Abstract Purpose To develop and benchmark eye plaque models for Monte Carlo (MC) simulation of iris melanoma brachytherapy and to develop a database of 3D dose distributions for the iris plaques containing 103Pd${}^{103}{\rm Pd}$, 125I${}^{125}{\rm I}$, and 131Cs${}^{131}{\rm Cs}$ seeds.
Djedouani M, Viner A, Fletcher EM, Thomson RM.   +3 more
europepmc   +2 more sources

Evaluation of extrapolation chamber response for surface and buildup dose assessment in radiotherapy photon beams using Monte Carlo simulations. [PDF]

Med Phys
Abstract Background Surface dose assessment is essential in radiotherapy, but accurately measuring doses in the buildup region of megavoltage beams presents significant challenges. Extrapolation chambers are frequently regarded as the most suitable detectors for this purpose. Purpose To establish under what conditions extrapolation chambers can be used
Reis CQM, Muir BR, Nicolucci P, Rogers DWO.   +3 more
europepmc   +2 more sources

Feasibility study: Use of an optical scanning system to obtain 3D body surface images suitable for total skin electron therapy treatment dosimetry. [PDF]

J Appl Clin Med Phys
Abstract Background Total skin electron therapy (TSET, also known as TSE, TSI, TSEI or TSEBT) provides an effective treatment for extensive superficial lesions such as mycosis fungoides, although the standing setups and large distances used for treatment mean that comprehensive three‐dimensional (3D) dose calculations are rarely achievable clinically ...
Crowe SB, Cassim N, Luscombe J, McMahon KL, Kairn T.   +4 more
europepmc   +2 more sources

Field output correction factors and perturbation factor analysis for novel SunSILICON and SunSILICON P silicon diode detectors. [PDF]

J Appl Clin Med Phys
Abstract Background Field output factor measurements of clinical linear accelerators require detector‐specific corrections, due to the introduction of fluence perturbation effects by non‐water‐equivalent components of applied detectors. Purpose This study aims to determine field output correction factors for novel shielded and unshielded silicon diode ...
Schönfeld AA, Alissa M, Towle D, Murray A, Schönfeld AB, Anders TJ, Alquist E, Evrard O, Rosenwald C, Hildreth J, Flatten V, Wessing G, Habib C, Czarnecki D.   +13 more
europepmc   +2 more sources

Performance evaluation of a new type of commercial silicon detectors for photon beam dosimetry. [PDF]

J Appl Clin Med Phys
Abstract Background Modern radiotherapy relies on advanced treatment techniques that utilize a large number of small fields, for which maintaining dosimetric accuracy is often challenging. Most vendors have introduced microdetectors suitable for small field dosimetry. Sun Nuclear has developed two silicon diodes with a sensitive volume of 0.35 mm3 that
Das IJ, Ding M, Ding GX.
europepmc   +2 more sources

Detector response and dose calculation lateral to material interfaces for 6 MV photon beam. [PDF]

J Appl Clin Med Phys
Abstract Background Dose calculation around inhomogeneities is challenging for many algorithms. A validation of dose distributions in these conditions is not straightforward, as detector response close to material interfaces is affected by the non‐equilibrium situation, the changing energy spectrum and the volume effect in a steep dose gradient ...
Ringholz J, Sauer OA, Wegener S.
europepmc   +2 more sources

Generation of 3D reference dosimetric datasets towards adoption of model-based dose calculations for permanent implant prostate brachytherapy. [PDF]

Med Phys
Abstract Purpose This work aims to create and validate a comprehensive set of test cases and 3D reference dosimetric datasets for model‐based dose calculation algorithms (MBDCAs) in permanent implant prostate brachytherapy. These test cases address the limits of the standard TG‐43 formalism towards improving dose evaluations in prostate cancer ...
Akbari F, Peppa V, Ouellet S, Moghadam N, Oliver S, Gimenez-Alventosa V, Beaulieu L, Vijande J, Thomson RM.   +8 more
europepmc   +2 more sources