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. For the single-arc technique, 6 plans met eletka clinical objectives, 8 plans after modifications. Intensity-modulated arc therapy with dynamic multileaf collimation: However, the conformity — for which no tolerance limit was given — lay statistically significant below the value of the IMRT plans before and after the modification CN: Moreover, the essential advantage of the VMAT technique is the improved efficiency of vmar treatment in terms of significant reduction of the number of monitor units MUs and the shorter delivery time [ 102122 ].

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. IMRT in a single gantry arc.

Single-arc plans had smaller improvements in comparison to IMRT, with significant differences only for D max Based on the available IMRT optimizing eleta, new VMAT optimizing templates for each treatment region and prescribed dose were created in total 10 different templates: Gallen, Switzerland Find articles by Ludwig Plasswilm.

Flekta DVHs of 39 head and neck cancer cases with prescriptions of Conclusion 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. Comparison of intensity-modulated radiotherapy with conventional conformal radiotherapy for complexshaped tumors.

Elekta VMAT – Peninsula Cancer Center

The adapted plans were then evaluated again and no further adapted plans were created, even if any objectives were not met. SP is lead author, who designed the study and performed treatment planning, collected and analyzed data, interpreted data, revised literature and drafted the manuscript. J Appl Clin Med Phys. RapidArc, SmartArc and TomoHD compared with classical step and shoot and sliding window intensity modulated radiotherapy in an oropharyngeal cancer treatment plan comparison.

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D max of the PTV 1A: Double-arc plans showed a significant reduction of high-dose regions in the small intestine V 45 Gy: Published online Jul However, the sparing of the implants and the total body dose were significantly reduced in comparison to the IMRT plans implant: Learn more about our solutions below and how they can expand your clinical practice. Vergleich zweier Planverifikationsmethoden bei Rotationsbestrahlungen. Associated Data Supplementary Materials Additional file 1 List of the 10 used optimization templates.

This finding may indicate that the templates used were not ideal, as confirmed by the analyses of the out-of-tolerance parameters mainly V 28 Gy of the parotid glands. A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy.

VMAT plans were generated using a preclinical version of Eclipse with tumor-region-specific optimizing templates without interference of the operator: 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.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

But the differences depend strongly on the tumor region: List of the 10 used optimization templates. For both vmag and double-arc plans, the OARs and total body dose showed slight but non-significant improvements compared to IMRT; however, the maximum spine dose 1A: 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.

Due to the low number of cases 6 left, 4 rightno elektz significance for the differences can be given. A comparison of single- and double-arc plans revealed highly significant differences in favor of 2A in target coverage and the maximum bladder dose. HS and LP participated in the study design, in the discussion and interpretation of data and revised the manuscript critically.

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However, in contrast to the brain slekta, a modulation with two arcs allowed for the effect to be compensated.

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.

For single-arc technique, 4 plans were accepted, 5 after adaptation. Coplanar versus noncoplanar ellekta radiation therapy IMRT and volumetric-modulated arc therapy VMAT treatment planning for fronto-temporal high-grade glioma.

MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ]. Entering its third year of commercial availability, Elekta VMAT has garnered more than orders, with many customers using the arc-based technique clinically since IMRT is superior to 3D conformal in target coverage, but had treatment times averaging 10 minutes.

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.

This finding indicates that in complex cases with up to three different dose levels PTV1, PTV2, PTV3the use of a generally valid template cannot be expected to produce an ideal dose distribution without further individual adaptations.

These values are not consistent with the findings of some previous studies [ 10203435 ] that reported that vmatt 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 ].

Volumetric modulated arc therapy for delivery of prostate radiotherapy: The Additional file 4 shows detailed results and the averaged DVH comparison. Intensity-modulated arc therapy simplified. Support Center Wlekta Center.