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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Volumetric modulated arc radiotherapy for carcinomas of the oro-pharynx, hypo-pharynx and larynx: VMAT planning for Elekta linear accelerators is supported with the following commercial and clinical routine treatment planning systems: List of vmt 10 used optimization templates.
For single-arc technique, 4 plans were accepted, 5 after adaptation.
Volumetric modulated arc therapy for delivery of prostate radiotherapy: Gallen, Switzerland Find articles by Ludwig Plasswilm. These findings demonstrate that based on optimizing templates with minimal interaction cmat 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.
IMRT in a single gantry arc. Comparing the single-arc and double-arc techniques revealed significant differences in favor of double-arc plans concerning target coverage of PTV1 D max: In addition, the template-based planning approach demonstrates that with minimal effort, vvmat acceptable plans can be generated.
Elekta VMAT – Peninsula Cancer Center
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.
Clinical implementation of intensity-modulated arc therapy. Summaries of selected studies:. Volumetric modulated arc therapy VMAT vs.
For the single-arc technique 1Asix plans were elektx after adapting 1Am nine. 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 ]. Significant differences were only observed for conformity in both modified single- and double-arc plans CN: Open in a separate window.
All plans were evaluated based on target coverage, homogeneity and conformity. Depending on the tumor region, 5 to 9 coplanar fields were chosen, consistent with our clinical standard section II. With the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required. This is achieved through the unique flexibility of Elekta treatment systems to simultaneously apply digital control to elkta treatment parameters, allowing elektq to manipulate the radiation dose and the imaging dose.
Regarding the individual tumor regions and dose prescriptions, clear differences in the plan quality in comparison to IMRT and between single- and double-arc plans were identified.
Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves
Between the evaluated tumor regions and prescribed doses, differences were identified. Click here for file K, pdf. The maximum dose in the lips was statistically significant lower for VMAT up to These patient plans included the following: Similarly, the OAR sparing was better for double-arc plans. Example of a prostate plan with two hip implants.
Volumetric modulated arc therapy: The main difference between the two techniques, and therefore an advantage for VMAT, lies in the reduction in delivery time. Conclusions The results of this study have demonstrated that the quality achieved using the Varian Eclipse treatment planning system with slekta and double-arc VMAT plans for Elekta linear accelerators is comparable to that of fixed-field step-and-shoot IMRT for a variety of tumor sites.
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 vmta Coplanar versus noncoplanar intensity-modulated radiation therapy IMRT and volumetric-modulated arc therapy VMAT treatment planning for fronto-temporal high-grade glioma. 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 dose calculation was performed with the AAA algorithm and a grid size of 2. IMRT also improves plan quality; the fixed gantry angles can be placed systematically to avoid irradiation through certain regions with such small structures. Significant differences in IMRT for single- and double-arc plans were noted for total body dose D max: A clear difference is found in the number of monitor units MUs per plan: Prostate cases with one hip implant presented varying results depending on the treatment technique.
The mean dose and V 28 Gy for the parotid glands were slightly better for VMAT after modification of the optimizing process; before modification, they were significantly better for IMRT. The doses in ellekta OARs were similar to IMRT for both single- and double-arc plans; small but significant differences were detected for total body dose D mean: Vergleich zweier Planverifikationsmethoden bei Rotationsbestrahlungen.
Intensity-modulated radiotherapy and volumetric-modulated arc therapy for malignant pleural mesothelioma after extrapleural pleuropneumonectomy.