ELEKTA VMAT PDF

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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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VMAT planning for Elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems: However, the sparing of the implants and the total body dose were significantly reduced in comparison to the IMRT plans implant: The dose coverage in the target volumes was better for all VMAT techniques.

Therefore, the quality of the vmatt can be analyzed. Intensity-modulated radiotherapy and volumetric-modulated arc therapy for malignant pleural mesothelioma after extrapleural pleuropneumonectomy.

Materials fmat Methods Patient plan selection and planning objectives From five different tumor regions — head and neck, brain, cervical and endometrial, breast and prostate — fixed-field step-and-shoot IMRT plans that were used for patient treatment between January and June on an Elekta Synergy Linac were examined.

Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: However, the differences were often small and detectable even when statistically significant with no clinical relevance, e.

IMRT; thin dashed line: Gallen, Switzerland Find articles by Ludwig Plasswilm. Treatment delivery systems With a comprehensive choice of delivery systems, Elekta is the ideal partner for ensuring that each clinic and patient receives the best system and treatment for their needs.

Gallen, Switzerland Find articles by Hans Schiefer. A total of 45 prostate cases were analyzed, of which 11 involved pelvic lymph nodes, 16 involved one hip implant and 18 involved two hip implants.

Nontumor integral dose variation in conventional radiotherapy treatment planning. Treatment times were decreased by up to 13 minutes or 59 percent.

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Elekta VMAT – Peninsula Cancer Center

Cases with target doses of Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency. The clinical step-and-shoot IMRT plans were generated elekha the Eclipse treatment planning system version 8. But the differences depend strongly on the tumor region: Different treatment planning systems TPS are available for accelerators from both manufacturers, and the VMAT technique produces plan quality and dose distributions that are comparable and often superior to those of fixed-field step-and-shoot or sliding window IMRT for a wide range of disease sites [ 10 – 20 ].

The mean dose for the heart seems to show a statistically significant improvement for single arc plans IMRT: Entering its third year of commercial availability, Elekta VMAT has eleita more than orders, with many customers using the arc-based technique clinically since This finding indicates that the integral dose for VMAT was smaller and mainly visible in the high-dose region; however, the low-dose region was slightly larger than for IMRT, possibly because the dose is spread all over the body, in contrast to IMRT, in which high doses are achieved only in the beam directions and hardly any doses are achieved outside of the beam directions.

In three spine cases, radiation dose was reduced versus IMRT. The adapted plans were then evaluated again and no further adapted plans were created, even if any objectives were not met.

Clinically acceptable target elfkta coverage was difficult to achieve with a single-arc technique; however, it was possible with two arcs. Published online Jul For single-arc technique, 4 plans were accepted, 5 after adaptation.

A comparison of single- and double-arc plans revealed highly significant differences in favor of 2A in target coverage and the maximum bladder dose.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

In addition, the template-based planning approach demonstrates that with minimal effort, clinically acceptable plans can be generated. After modifying the optimization penalties, no improvements could be identified for either the target volume or the OAR. Vergleich zweier Planverifikationsmethoden bei Elektz.

MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ]. Breast cases An acceptable plan was achieved for the double-arc technique in 9 out of 10 breast cancer cases; an acceptable plan was achieved in 5 cases for the single-arc technique. All 2A plans for the Elekkta cases met the clinical objectives; 1A plans were acceptable in 8 cases, 10 after modification.

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A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy. During the optimizing process, the objectives or weights were not adjusted to exclude the influence of the operator, which allows an objective and independent evaluation of the dose distribution of all tumor regions. In all non-acceptable cases before and after adapting the optimizing processeither the maximum target dose was too high 1A: The main difference between the two techniques, and therefore an advantage for VMAT, lies in the reduction in delivery time.

Impact of MLC leaf width on volumetric-modulated arc therapy planning for head and neck vat. Implementing IMRT in clinical practice: Intensity-modulated arc therapy with dynamic multileaf collimation: For most non-acceptable plans, the following values were out of tolerance: Summaries of selected studies:.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

Before 1A, 2A and after modification 1Am, 2Am of the optimization penalties divided by tumor site: VMAT in treatment of spinal metastases.

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. Furthermore, plans with two arcs provide better dose distributions than plans with one arc.

Development and evaluation of an efficient approach to volumetric arc therapy planning. Mean DVHs of 12 brain cancer cases. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions.