scholarly journals Exploratory study of the association of volumetric modulated arc therapy ( VMAT ) plan robustness with local failure in head and neck cancer

2017 ◽  
Vol 18 (4) ◽  
pp. 76-83 ◽  
Author(s):  
Wei Liu ◽  
Samir H. Patel ◽  
Daniel P. Harrington ◽  
Yanle Hu ◽  
Xiaoning Ding ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Neck Cancer ◽  
Exploratory Study ◽  
Volumetric Modulated Arc Therapy ◽  
Local Failure ◽  
Arc Therapy

scholarly journals Is volumetric modulated arc therapy with constant dose rate a valid option in radiation therapy for head and neck cancer patients?

2018 ◽  
Vol 23 (3) ◽  
pp. 175-182 ◽  
Author(s):  
Annamaria Didona ◽  
Valentina Lancellotta ◽  
Claudio Zucchetti ◽  
Bianca Moira Panizza ◽  
Alessandro Frattegiani ◽  
...  
Keyword(s):  
Radiation Therapy ◽  
Head And Neck Cancer ◽  
Head And Neck ◽  
Dose Rate ◽  
Cancer Patients ◽  
Neck Cancer ◽  
Volumetric Modulated Arc Therapy ◽  
Arc Therapy ◽  
Constant Dose ◽  
Constant Dose Rate

scholarly journals Validation of the relative insensitivity of volumetric-modulated arc therapy (VMAT) plan quality to gantry space resolution

2016 ◽  
Vol 58 (4) ◽  
pp. 579-590 ◽  
Author(s):  
Ghulam Murtaza ◽  
Stefania Cora ◽  
Ehsan Ullah Khan
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Cancer Patients ◽  
Neck Cancer ◽  
Treatment Plan ◽  
Volumetric Modulated Arc Therapy ◽  
Optimization Techniques ◽  
Plan Quality ◽  
Arc Therapy ◽  
Single Arc

Abstract Volumetric-modulated arc therapy (VMAT) is an efficient form of radiotherapy used to deliver intensity-modulated radiotherapy beams. The aim of this study was to investigate the relative insensitivity of VMAT plan quality to gantry angle spacing (GS). Most previous VMAT planning and dosimetric work for GS resolution has been conducted for single arc VMAT. In this work, a quantitative comparison of dose–volume indices (DIs) was made for partial-, single- and double-arc VMAT plans optimized at 2°, 3° and 4° GS, representing a large variation in deliverable multileaf collimator segments. VMAT plans of six prostate cancer and six head-and-neck cancer patients were simulated for an Elekta SynergyS® Linac (Elekta Ltd, Crawley, UK), using the SmartArc™ module of Pinnacle³ TPS, (version 9.2, Philips Healthcare). All optimization techniques generated clinically acceptable VMAT plans, except for the single-arc for the head-and-neck cancer patients. Plan quality was assessed by comparing the DIs for the planning target volume, organs at risk and normal tissue. A GS of 2°, with finest resolution and consequently highest intensity modulation, was considered to be the reference, and this was compared with GS 3° and 4°. The differences between the majority of reference DIs and compared DIs were <2%. The metrics, such as treatment plan optimization time and pretreatment (phantom) dosimetric calculation time, supported the use of a GS of 4°. The ArcCHECK™ phantom–measured dosimetric agreement verifications resulted in a >95.0% passing rate, using the criteria for γ (3%, 3 mm). In conclusion, a GS of 4° is an optimal choice for minimal usage of planning resources without compromise of plan quality.

Intensity-modulated radiotherapy or volumetric-modulated arc therapy in patients with head and neck cancer: Focus on salivary glands dosimetry

Head & Neck ◽  
2016 ◽  
Vol 38 (7) ◽  
pp. 1028-1034 ◽  
Author(s):  
Alexis Vallard ◽  
Jean-Baptiste Guy ◽  
Sylvie Mengue Ndong ◽  
Nicolas Vial ◽  
Romain Rivoirard ◽  
...  
Keyword(s):  
Head And Neck Cancer ◽  
Head And Neck ◽  
Salivary Glands ◽  
Neck Cancer ◽  
Volumetric Modulated Arc Therapy ◽  
Intensity Modulated Radiotherapy ◽  
Intensity Modulated ◽  
Arc Therapy
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