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 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: By continuing to browse the site you are agreeing to our use of cookies.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

Intensity-modulated arc fmat with dynamic multileaf collimation: For cases with one hip implant, two resp. By continuing to browse the site you are agreeing to our use of cookies. Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: Before 1A, 2A and after modification 1Am, 2Am of the optimization penalties divided by tumor site: For single-arc technique, 4 plans were accepted, 5 after adaptation.

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.

These values are not consistent with the findings of some previous studies [ vmst203435 ] that reported that the integral dose delivered to the patient is independent of the number of beams and the treatment technique; however, some other studies confirm our results [ 111618 ]. Brain cases Of the 12 brain cancer cases, five 2A plans were acceptable for both OAR sparing and target coverage; after adapting the optimization penalties, 6 plans met all objectives.

Inverse planning for intensity-modulated arc therapy using direct aperture optimization. The length of the arcs was adjusted separately for each case eleta implant: Its rich, intuitive tools make the radiotherapy planning process faster, easier and clinically reliable.

Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency. With the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required.

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A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy.

These patient plans included the following:. An arc-sequencing algorithm for intensity modulated arc therapy. In these cases, small and fine structured contours such as lenses and optical nerves often lie near to the target.

Comparing single- and double-arc plans, all parameters except MUs exhibited differences in favor of the double-arc technique, and differences in the parameters for PTV coverage, maximum dose in the bladder and rectum were statistically significant. Please review our privacy policy. In a comparison of single- and double-arc techniques, the PTV coverage was significantly different for plans with two arcs.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

The maximum dose in the lips was statistically significant lower for VMAT up to A conformation number to quantify the degree of conformality in brachytherapy and external beam irradiation: But the differences depend on the side of the irradiated breast: All these templates were tested on a few patients to evaluate whether they produced reasonable results concerning the plan quality eleta comparison to IMRT and concerning the irradiation by measuring the treatment time and dose distribution [ 26 ].

Volumetric modulated arc therapy for delivery of prostate radiotherapy: The differences varied but were mainly significant and clinically flekta for the target coverage, particularly for the following: Physicians can visualize the tumor target at the time of treatment and guide therapy that increases radiation dose to the target while reducing exposure to surrounding healthy tissues.

For the right optical nerve, increases of 2. Gallen, Rorschacherstrasse 95, St. 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.

Depending on the tumor region, 5 to 9 coplanar fields were chosen, consistent with our clinical standard section II. CN ranges from 0 to 1, where 1 is the ideal eleekta.

The number of monitor units was statistically significant lower for VMAT by factors of 1. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions. The elekra 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 ].

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Elekta VMAT – Peninsula Cancer Center

Treatment times were decreased by up to 13 minutes or 59 percent. RapidArc, SmartArc and TomoHD compared with classical step and shoot and sliding window intensity modulated radiotherapy in an oropharyngeal cancer treatment plan comparison. The newest release of the Eclipse TPS v. The clinical step-and-shoot IMRT plans were generated using the Eclipse treatment planning system version 8.

If one or more objectives were exceeded, the plan was considered elekfa unacceptable, and a second VMAT plan was created by adapting the optimization penalties once. The mean dose for the heart seems to show a statistically significant improvement for single arc plans IMRT: The differences between single- and double-arc plans were small; significant differences in favor of 2A were noted for the maximum dose in the PTV ellekta Summaries of selected studies: MLCs with elekra widths may improve the plan quality for such cases [ 28 – 30 ].

Table 1 Planning objectives for organs at risk and target volumes.

Click here for file 96K, pdf. Therefore, the proper quality of the optimizing engine is shown.

A comparison of single- and double-arc plans revealed highly significant differences in favor of 2A in target coverage and the maximum bladder dose. VMAT planning for Elekta linear accelerators is supported with the bmat commercial and clinical routine treatment planning systems: Volumetric-modulated arc radiotherapy for carcinomas of the anal canal: Supplementary Material Additional file 1: Cases with two implants had acceptable 2A plans in 6 of 16 cases.

These findings demonstrate that based on optimizing templates with minimal interaction of the operator, the Eclipse TPS is able to achieve a plan quality for the Elekta VMAT delivery technique that is comparable to that of fixed-field IMRT.