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 …

Evaluation of the gamma dose distribution comparison method

DA Low, JF Dempsey - Medical physics, 2003 - Wiley Online Library
The γ tool was developed to quantitatively compare dose distributions, either measured or
calculated. Before computing γ, the dose and distance scales of the two distributions …

A comparison of the gamma index analysis in various commercial IMRT/VMAT QA systems

M Hussein, P Rowshanfarzad, MA Ebert… - Radiotherapy and …, 2013 - Elsevier
Purpose To investigate the variability of the global gamma index (γ) analysis in various
commercial IMRT/VMAT QA systems and to assess the impact of measurement with low …

Evaluation of a new VMAT QA device, or the “X” and “O” array geometries

V Feygelman, G Zhang, C Stevens… - Journal of applied …, 2011 - Wiley Online Library
We introduce a logical process of three distinct phases to begin the evaluation of a new 3D
dosimetry array. The array under investigation is a hollow cylinder phantom with diode …

Interpretation and evaluation of the γ index and the γ index angle for the verification of IMRT hybrid plans

M Stock, B Kroupa, D Georg - Physics in Medicine & Biology, 2005 - iopscience.iop.org
In IMRT, the method for a quantitative comparison of two-dimensional dose distributions is
still under development. The γ evaluation method proposed by Low et al is the most …

Characterization and clinical evaluation of a novel IMRT quality assurance system

R Sadagopan, JA Bencomo, RL Martin… - Journal of Applied …, 2009 - Wiley Online Library
Intensity‐modulated radiation therapy (IMRT) is a complex procedure that involves the
delivery of complex intensity patterns from various gantry angles. Due to the complexity of …

A critical evaluation of the PTW 2D‐ARRAY seven29 and OCTAVIUS II phantom for IMRT and VMAT verification

M Hussein, EJ Adams, TJ Jordan… - Journal of applied …, 2013 - Wiley Online Library
Quality assurance (QA) for intensity‐and volumetric‐modulated radiotherapy (IMRT and
VMAT) has evolved substantially. In recent years, various commercial 2D and 3D ionization …

Clinical experience on patient‐specific quality assurance for CBCT‐based online adaptive treatment plan

C Shen, L Chen, X Zhong, Y Gonzalez… - Journal of applied …, 2023 - Wiley Online Library
Purpose Ethos CBCT‐based adaptive radiotherapy (ART) system can generate an online
adaptive plan by re‐optimizing the initial reference plan based on the patient anatomy at the …

Hybrid plan verification for intensity-modulated radiation therapy (IMRT) using the 2D ionization chamber array I'mRT MatriXX—a feasibility study

B Dobler, N Streck, E Klein, R Loeschel… - Physics in Medicine …, 2009 - iopscience.iop.org
The 2D ionization chamber array I'mRT MatriXX (IBA, Schwarzenbruck, Germany) has been
developed for absolute 2D dosimetry and verification of intensity-modulated radiation …

A unified path seeking algorithm for IMRT and IMPT beam orientation optimization

P Ramesh, G Valdes, D O'Connor… - Physics in Medicine & …, 2023 - iopscience.iop.org
Objective. Fully automated beam orientation optimization (BOO) for intensity-modulated
radiotherapy and intensity modulated proton therapy (IMPT) is gaining interest, since …