Challenges in calculation of the gamma index in radiotherapy–towards good practice

M Hussein, CH Clark, A Nisbet - Physica Medica, 2017 - Elsevier
The gamma index (γ) is one of the most commonly used metrics for the verification of
complex modulated radiotherapy. The mathematical definition of the γ is computationally …

Energy dependence and dose response of Gafchromic EBT2 film over a wide range of photon, electron, and proton beam energies

B Arjomandy, R Tailor, A Anand, N Sahoo… - Medical …, 2010 - Wiley Online Library
Purpose: Since the Gafchromic film EBT has been recently replaced by the newer model
EBT2, its characterization, especially energy dependence, has become critically important …

Evaluation of the ArcCHECK QA system for IMRT and VMAT verification

G Li, Y Zhang, X Jiang, S Bai, G Peng, K Wu, Q Jiang - Physica medica, 2013 - Elsevier
The purposes of this study were to perform tests for the ArcCHECK QA system, and to
evaluate the suitability of this system for IMRT and VMAT verification. The device was tested …

Dosimetric evaluation of a 2D pixel ionization chamber for implementation in clinical routine

J Herzen, M Todorovic, F Cremers… - Physics in Medicine …, 2007 - iopscience.iop.org
In this paper we present the results of a dosimetric evaluation of a 2D ionization chamber
array with the objective of its implementation for quality assurance in clinical routine. The …

Comparison of two commercial detector arrays for IMRT quality assurance

JG Li, G Yan, C Liu - Journal of applied clinical medical physics, 2009 - Wiley Online Library
Two commercially available detector arrays were compared for their use in the quality
assurance of patient‐specific IMRT treatment plans: one a diode‐based array (MapCHECK) …

Characterization of a novel two dimensional diode array the “magic plate” as a radiation detector for radiation therapy treatment

JHD Wong, I Fuduli, M Carolan, M Petasecca… - Medical …, 2012 - Wiley Online Library
Purpose: Intensity modulated radiation therapy (IMRT) utilizes the technology of multileaf
collimators to deliver highly modulated and complex radiation treatment. Dosimetric …

Use of a two‐dimensional ionization chamber array for proton therapy beam quality assurance

B Arjomandy, N Sahoo, X Ding, M Gillin - Medical physics, 2008 - Wiley Online Library
Two‐dimensional ion chamber arrays are primarily used for conventional and intensity
modulated radiotherapy quality assurance. There is no commercial device of such type …

Verification of patient‐specific dose distributions in proton therapy using a commercial two‐dimensional ion chamber array

B Arjomandy, N Sahoo, G Ciangaru, R Zhu… - Medical …, 2010 - Wiley Online Library
Purpose: The purpose of this study was to determine whether a two‐dimensional (2D) ion
chamber array detector quickly and accurately measures patient‐specific dose distributions …

Evaluation of a 2D detector array for patient-specific VMAT QA with different setups

R Boggula, M Birkner, F Lohr, V Steil… - Physics in Medicine & …, 2011 - iopscience.iop.org
For pre-treatment plan verification of advanced treatment techniques such as intensity-
modulated arc therapy, a fast and reliable dosimetric device is required. In this study, we …

IMRT QA and gamma comparisons: The impact of detector geometry, spatial sampling, and delivery technique on gamma comparison sensitivity

JM Steers, BA Fraass - Medical Physics, 2021 - Wiley Online Library
Purpose To separately quantify sensitivity differences in patient‐specific quality assurance
comparisons analyzed with the gamma comparison for different measurement geometries …