Experimental verification of magnetic field dose effects for the MRI-accelerator

AJE Raaijmakers, BW Raaymakers… - Physics in Medicine & …, 2007 - iopscience.iop.org
The MRI-linear accelerator system, currently being developed, is designed such that the
patient is irradiated in the presence of a magnetic field. This influences the dose distribution …

A finite element method for the determination of the relative response of ionization chambers in MR-linacs: simulation and experimental validation up to 1.5 T

S Pojtinger, RP Kapsch, OS Dohm… - Physics in Medicine & …, 2019 - iopscience.iop.org
In magnetic resonance (MR) guided radiotherapy, the magnetic field-dependent change in
the dose response of ionization chambers is typically included by means of a correction …

Integrating a MRI scanner with a 6 MV radiotherapy accelerator: impact of the surface orientation on the entrance and exit dose due to the transverse magnetic field

AJE Raaijmakers, BW Raaymakers… - Physics in Medicine …, 2007 - iopscience.iop.org
At the UMC Utrecht, in collaboration with Elekta and Philips Research Hamburg, we are
developing a radiotherapy accelerator with integrated MRI functionality. The radiation dose …

Dosimetry for the MRI accelerator: the impact of a magnetic field on the response of a Farmer NE2571 ionization chamber

I Meijsing, BW Raaymakers… - Physics in Medicine …, 2009 - iopscience.iop.org
The UMC Utrecht is constructing a 1.5 T MRI scanner integrated with a linear accelerator
(Lagendijk et al 2008 Radiother. Oncol. 86 25–9). The goal of this device is to facilitate soft …

Measurement validation of treatment planning for a MR‐Linac

X Chen, ES Paulson, E Ahunbay… - Journal of Applied …, 2019 - Wiley Online Library
Purpose The magnetic field can cause a nonnegligible dosimetric effect in an MR‐Linac
system. This effect should be accurately accounted for by the beam models in treatment …

Quantification of static magnetic field effects on radiotherapy ionization chambers

J Agnew, F O'Grady, R Young, S Duane… - Physics in Medicine & …, 2017 - iopscience.iop.org
Integrated magnetic resonance (MR) imaging and radiotherapy (RT) delivery machines are
currently being developed, with some already in clinical use. It is anticipated that the strong …

Magnetic-field-induced dose effects in MR-guided radiotherapy systems: dependence on the magnetic field strength

AJE Raaijmakers, BW Raaymakers… - Physics in Medicine & …, 2008 - iopscience.iop.org
Several institutes are currently working on the development of a radiotherapy treatment
system with online MR imaging (MRI) modality. The main difference between their designs is …

Magnetic field induced dose effects in radiation therapy using MR‐linacs

CY Huang, B Yang, WW Lam, H Geng… - Medical …, 2023 - Wiley Online Library
MR‐guided radiotherapy (MRgRT) is one of the most significant advances in radiotherapy in
recent years. The hybrid systems were designed to visualize patient anatomical and …

Evaluation of a commercial MRI Linac based Monte Carlo dose calculation algorithm with geant 4

SB Ahmad, A Sarfehnia, MR Paudel, A Kim… - Medical …, 2016 - Wiley Online Library
Purpose: This paper provides a comparison between a fast, commercial, in‐patient Monte
Carlo dose calculation algorithm (GPUMCD) and geant4. It also evaluates the dosimetric …

Integrating a MRI scanner with a 6 MV radiotherapy accelerator: dose increase at tissue–air interfaces in a lateral magnetic field due to returning electrons

AJE Raaijmakers, BW Raaymakers… - Physics in Medicine & …, 2005 - iopscience.iop.org
In the framework of the development of the integration of a MRI-scanner with a linear
accelerator, the influence of a lateral, magnetic field on the dose distribution has to be …