ELEKTA VMAT PDF
VMAT planning for Elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems. Med Phys. Mar;37(3) Comparison of Elekta VMAT with helical tomotherapy and fixed field IMRT: plan quality, delivery efficiency and accuracy. VMAT, formally known as Intensity Modulated Arc Therapy. (IMAT), was first brought up by Dr. . Elekta VMAT can be delivered using single or multiple arcs.
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During the optimizing process, the objectives or weights were not adjusted to exclude the influence of the operator, which allows an objective and elekya evaluation of the dose distribution of all tumor regions.
IMRT plan comparisons for prostate cancer. Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: But the vmatt depend on the side of the irradiated breast: Depending on the tumor region at least 3 prostate, cervical to 6 breast, head and neck, brain attempts were taken to get a clinically acceptable IMRT plan. Received Mar 13; Accepted Jun Most importantly, compared to other commercial arc therapy techniques, Elekta VMAT provides the oncologist with the freedom to choose how the optimal dose will be delivered.
Significant differences were only observed for conformity in both modified single- and double-arc plans CN: SP is lead author, who designed the study and performed treatment planning, collected and analyzed data, interpreted data, revised literature and drafted the manuscript.
Click here for file K, pdf. VMAT provides high dose eleota to the target, while reducing risk to critical structures VMAT optimizes target dose delivery for all different patients and pathologies VMAT can reduce treatment time which can also decrease the likelihood of patient movement VMAT increases patient throughput due to faster delivery times, resulting in reduced waiting lists. A vmar of single- and double-arc techniques revealed significant differences in favor of double-arc plans concerning target coverage D max: With a comprehensive choice of delivery systems, Elekta is the ideal vkat for ensuring that each clinic and patient receives the best system and treatment for their needs.
Conclusions The results of this study have demonstrated that the quality achieved using the Varian Eclipse treatment planning system with single- and double-arc VMAT plans for Elekta linear accelerators is comparable to that of fixed-field step-and-shoot IMRT for a variety of tumor sites.
A total of plans were evaluated in this study, including 38 endometrial, 57 head and neck, 12 brain, 10 breast and 45 prostate cancer cases. However, the maximum doses of the lenses and the optical nerves were lower for VMAT lenses: The study was performed based on ethical board approval Ethics Committee St.
However, the maximum spine dose was clearly lower for all VMAT techniques up to The maximum dose in the lips was statistically significant lower for VMAT up to Volumetric modulated arc therapy VMAT vs. Regarding the individual tumor regions and dose prescriptions, clear differences in the plan quality in comparison to IMRT and between single- and double-arc plans were identified.
The number of monitor units was statistically significant lower for VMAT by factors of 1. However, conformity was significantly better for single- and double-arc plans CN: Volumetric modulated arc therapy: Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency. Inverse planning for intensity-modulated arc therapy using direct aperture optimization. The clinical step-and-shoot IMRT plans were generated using the Eclipse treatment planning system version 8.
Prostate cases with one hip implant presented varying results depending on the treatment technique. The entire treatment takes just 10 minutes, encompassing patient room entry, imaging of the patient on the table to adjust treatment positioning, seconds of VMAT beam-on-time and patient room exit.
All plans were evaluated based on target coverage, homogeneity and conformity.
Elekta VMAT – Peninsula Cancer Center
This article has been cited by other articles in Eelekta. However, the sparing of the implants and the total body dose were significantly reduced in comparison to the IMRT plans implant: Based on the available IMRT optimizing templates, new VMAT optimizing templates for each vmta region and prescribed dose were created in total 10 different templates: All these templates were tested on a few patients to evaluate whether they produced reasonable results concerning the plan quality in comparison to IMRT and concerning the irradiation by measuring the treatment time and dose distribution [ 26 ].
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Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves
With Elekta VMAT, single or multiple radiation beams sweep in uninterrupted arc s around the patient, reducing treatment times from the eight to 12 minutes required for standard radiation therapy to as few as two minutes. MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ].
For most non-acceptable plans, the following values were out of tolerance: The mean dose and V 28 Gy for the parotid glands were slightly better for VMAT after modification of the optimizing process; before modification, they were significantly better for IMRT.
CN ranges from 0 to 1, where 1 is the eleita value. These patient plans included the following: Author information Article notes Copyright and License information Disclaimer.