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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Varian Medical systems, Inc. By continuing to browse the site you are agreeing to our use of cookies. However, conformity was significantly better for single- and double-arc plans CN: However, the differences were often small and detectable even when statistically significant with no clinical relevance, e.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

With the introduced procedure of the optimizing process, the influence of the operator was eliminated or at least minimized. This site uses cookies. Materials and Methods Patient plan selection and planning objectives From five different tumor regions eleita 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.

For the single-arc technique, 8 plans met the objectives, 9 after modification.

Plans with two arcs show better dose distributions than plans with one arc. 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.

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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: Prostate cases A total of 45 prostate cases were vamt, of which 11 involved pelvic lymph nodes, 16 involved one hip implant and 18 involved two hip implants.

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.

Prostate volumetric-modulated arc therapy: The OARs met the clinical objectives in all cases for all eleka.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

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. VMAT plans were generated using a preclinical version of Eclipse with tumor-region-specific optimizing templates without interference of the operator: Treatment solutions Treatment delivery systems Downloads and assets.

Casa di Cura S. The total body and rectum doses were better in favor of single-arc plans. These values are not consistent with the findings of some previous studies [ 10203435 ] 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 ].

The Additional file 4 shows detailed results and the averaged DVH comparison. 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. Leaf position error during conformal dynamic arc and intensity modulated arc treatments.

IMRT plan comparisons for prostate cancer. Monaco delivers high performance and high precision radiotherapy treatment planning for all major treatment techniques for photon and electron based plans. Furthermore, plans with two arcs provide better dose distributions than plans with one arc.

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A comprehensive dosimetric evaluation of using RapidArc volumetric-modulated arc therapy for the treatment of early-stage nasopharyngeal carcinoma. MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ]. A total of plans were evaluated in this study, including 38 endometrial, 57 head and neck, 12 brain, 10 breast and 45 prostate cancer cases. 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 ].

Support Center Support Center. A clear difference is found in the number of monitor units MUs per plan: Depending on the tumor region, 5 to 9 coplanar fields were chosen, consistent with our clinical standard section II.

All 2A plans for the LN cases met the clinical objectives; 1A plans were acceptable in 8 cases, 10 after modification. HS and LP participated in the study design, in the discussion and interpretation of data and revised the manuscript critically.

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: In three spine cases, radiation dose was reduced versus IMRT.

Mean DVHs of 12 brain cancer cases.