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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Open in a separate window. Volumetric modulated arc therapy for delivery of prostate radiotherapy: A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy.

Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: Materials and 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.

Precision planning for photon and electron based plans Monaco delivers high performance and high precision radiotherapy treatment planning for all major treatment techniques for photon and electron based plans. Before 1A, 2A and after modification 1Am, 2Am of the optimization penalties divided by tumor site: VMAT plans were generated using a preclinical version of Eclipse with tumor-region-specific optimizing templates without interference of the operator: Moreover, the essential advantage of the VMAT technique is the improved efficiency of the treatment in terms of significant reduction of the number of monitor units MUs and the shorter delivery time [ 102122 ].

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. Volumetric modulated arc therapy: SP is lead author, who designed the study and performed treatment planning, collected and analyzed data, interpreted data, revised literature and drafted the manuscript. Mean DVHs of 18 prostate cancer cases with two hip implants.

Intensity-modulated arc therapy simplified. Plans with brain tumors showed similar behavior: Similarly, the OAR sparing was better for double-arc plans.

These patient plans included the following: Inverse planning for intensity-modulated arc therapy using direct aperture optimization. Clinicians at University Medical Center Mannheim have been evaluating Elekta VMAT for a year, utilizing the technique for 15 patients with prostate or paraspinal tumors.


The doses in the OARs were similar to IMRT for both single- and double-arc plans; small but significant differences were detected elektaa total body dose D elektz It also is beneficial for patients whose pain makes prolonged treatment sessions undesirable.

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.

With the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required.

Elekta VMAT – Peninsula Cancer Center

Click here for file 96K, pdf. 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 ].

Plans with two arcs show better dose distributions than plans with one arc. VMAT provides high dose conformance 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.

Journal List Radiat Epekta v. Detailed values and the averaged DVH comparison are shown in the Additional file 5.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

An arc-sequencing algorithm for intensity modulated arc therapy. Leaf position error during conformal dynamic arc and intensity modulated arc treatments.

Gallen, Switzerland Find articles by Samuel Peters.

Even if the results of these studies show some differences that may be caused by different optimizing engines, the number of arcs per plan, the linac type or tumor sites, the conclusions are consistent: Double-arc plans with one implant were acceptable in 11 of the 18 total cases and in 14 cases after adapting the optimization penalties. 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.


The Additional file 4 shows detailed results and the averaged DVH comparison.

Elekta VMAT

All authors read and approved the final manuscript. This work confirmed for Mannheim doctors the ability of the Elekta treatment and control systems to deliver the radiation arcs rapidly and as specified in plans.

These patient plans included the following:. The median dose of the sub-dose levels was significantly higher than in IMRT 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 elektta to that of fixed-field step-and-shoot IMRT for a variety of tumor sites.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

The differences between single- and double-arc plans were small: For single-arc technique, 4 plans were accepted, 5 after adaptation. For both single- 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: After modifying the optimization penalties, the number of acceptable plans increased to 11; 5 single-arc plans were acceptable, 7 after modification.

Comparing the single- and double arc techniques reveals significant differences in favor of double-arc plans concerning target coverage of PTV1 D max: 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. With Elekta VMAT, single or multiple radiation beams sweep in uninterrupted arc s around the patient, dramatically speeding treatment delivery.

The mean total body dose was statistically significant lower for the considered arc techniques IMRT: In a comparison of single- and double-arc techniques, the PTV epekta was eoekta different for plans with two arcs. Therefore, the proper quality of the optimizing engine is shown.

In addition, the template-based planning approach demonstrates that with minimal effort, clinically acceptable plans can be generated. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions.

Comparison of intensity-modulated radiotherapy with conventional conformal radiotherapy for complexshaped tumors.