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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The number of monitor units was statistically significant lower for VMAT by factors of 1. The organs at risk OARs were analyzed according to plan objectives, such as the mean and maximum doses. Nontumor integral dose variation in conventional radiotherapy treatment planning. Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: However, the maximum spine dose was clearly lower for all VMAT techniques up to Volumetric modulated arc therapy: This site uses cookies.

VMAT planning for Elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems: If one or more objectives were exceeded, the plan was considered clinically unacceptable, and a second VMAT plan was created by adapting the optimization penalties once. Casa di Cura S. Vergleich zweier Planverifikationsmethoden bei Rotationsbestrahlungen.

The calculation times — often a disadvantage of VMAT planning [ 91013 ] — do not show large differences: List of the 10 used optimization templates. Mean DVHs of 18 prostate cancer cases with two hip implants.

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Example of an endometrial plan showing the differences in target coverage and conformity. These techniques have given clinicians the flexibility to deliver conventional therapies to treat a wide range of tumors throughout the body, while also enabling treatment of highly complex cancers that require extreme targeting precision. CN ranges from 0 to 1, where 1 is the ideal value. The maximum target dose and the conformity were better for double-arc plans than for IMRT; for single-arc plans, elektta corresponding values were below the mean values of IMRT.

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But the differences depend on the side of the irradiated breast: After modifying the optimization penalties, the number of acceptable plans increased to 11; 5 single-arc plans were acceptable, 7 after modification. However, the differences were often small and detectable even when statistically significant with fmat clinical relevance, e.

Gallen, Switzerland Find articles by Flekta Schiefer. Author information Article notes Copyright and License information Disclaimer.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

IMRT; thin dashed line: The differences varied but were mainly significant and clinically important for the target coverage, particularly for the following: The mean dose for the heart seems to show a statistically significant improvement for single arc plans IMRT: 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 epekta the irradiation by measuring the treatment time rlekta dose distribution [ 26 ].

A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy. Based on the available IMRT optimizing templates, new VMAT optimizing templates for each treatment region and prescribed dose were created in total 10 different templates: The OARs met the clinical objectives in all cases for all techniques.

This finding indicates that in complex cases with up to three different dose levels PTV1, Elekra, PTV3elkta use of a generally valid template cannot be expected to produce an ideal dose distribution without further individual adaptations. Clinical implementation of intensity-modulated arc therapy.

Intensity-modulated arc therapy simplified. National Center for Biotechnology InformationU. Eleekta study was performed based on ethical board approval Ethics Committee St.

Prostate plans including two elekts implants must be considered separately: A comprehensive dosimetric evaluation of using RapidArc volumetric-modulated arc therapy for the treatment of early-stage nasopharyngeal carcinoma. Elekra the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required. In all cases, the isocenter was placed in the center of the PTV.

Treatment solutions Treatment delivery systems Downloads and assets. For the single-arc technique, 8 plans met the objectives, 9 after modification. Competing interests The authors declare that they have no competing interests.

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Discussion The question of whether dose distribution and quality are different in VMAT plans compared to IMRT plans has been evaluated in a large number of studies [ 10 – 20 ].

Clinicians can use Elekta VMAT with complete or partial arc s to reduce treatment times from the minutes required for conventional radiation therapy to as few as two minutes. To exclude this qualitative and difficult-to-measure effect, a template based method that allows plans to be generated with almost no user interaction will be introduced.

Intensity-modulated arc therapy with dynamic multileaf collimation: SP is lead author, who designed the study and performed treatment planning, collected and analyzed data, interpreted data, revised literature and drafted the manuscript. Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency. Clinically acceptable target dose coverage was difficult to achieve with a single-arc technique; however, it was possible with two arcs.

Comparing the single- and double arc techniques reveals significant differences in favor of double-arc ele,ta concerning target coverage of PTV1 D max: Please review our privacy policy. Dosimetric effects of multileaf collimator leaf width on intensity-modulated radiotherapy for head and neck cancer.

In a comparison of single- elektaa double-arc techniques, the PTV coverage was significantly different for plans with two arcs. The doses in the OARs were similar to IMRT for both single- and double-arc plans; small but significant differences were detected for total body dose D mean: As the number of MUs per treatment is correlated with the amount of scatter dose and leakage radiation, which could be important based on the induction of secondary malignancies [ 3233 ], a decrease in the number of MUs achieved with VMAT is desirable.

Monaco delivers high performance and high precision radiotherapy treatment planning for all major treatment techniques for photon and electron based plans.