ELEKTA VMAT PDF
March 28, 2020 | by admin
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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IMRT plan comparisons for prostate cancer. Inverse planning for intensity-modulated arc therapy using direct aperture optimization. All authors read and approved the final manuscript. Similarly, the OAR sparing was better for double-arc plans. 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.
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Comparison of intensity-modulated radiotherapy with conventional conformal radiotherapy for complexshaped tumors. With Elekta VMAT, single or multiple radiation beams sweep in uninterrupted arc s around the patient, dramatically speeding treatment delivery.
Click elskta for file 96K, pdf. The newest release of the Eclipse TPS v. 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. Volumetric modulated arc therapy for delivery of prostate radiotherapy: Published online Jul The OARs met the clinical objectives in all cases for all techniques.
Nontumor integral dose variation in conventional radiotherapy treatment planning.
Elekta VMAT – Peninsula Cancer Center
The length of the arcs was adjusted separately for each case one implant: A comparison of single- and double-arc techniques revealed significant differences in favor of double-arc plans concerning target coverage D max: Intensity-modulated arc therapy simplified. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions.
Detailed values and the averaged DVH comparison are shown in the Additional file 2.
Gallen, Switzerland Find articles by Hans Schiefer. IMRT also improves plan quality; the fixed gantry angles can be placed systematically to avoid irradiation through certain regions with such small structures. Author information Article notes Copyright and License information Disclaimer.
The entire treatment takes just 10 minutes, encompassing patient room entry, imaging of the patient on the table to adjust treatment positioning, seconds of VMAT beam-on-time and patient room exit.
MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ]. National Center for Biotechnology InformationU. The Additional file 4 shows detailed results and the averaged DVH comparison. Associated Data Supplementary Materials Additional file 1 List of the 10 used optimization templates. With Elekta VMAT, single or multiple radiation beams sweep in uninterrupted arc s around the patient, reducing treatment times from the eight to 12 minutes required for standard radiation therapy to as few as two minutes.
Summaries of selected studies:. Table 1 Planning objectives for organs at risk and target volumes. SP is lead author, who designed the study and performed treatment planning, collected and analyzed data, interpreted data, revised literature and drafted the manuscript.
The dose calculation was performed with the AAA algorithm and a grid size of 2.
Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves
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. The median dose of the sub-dose levels was significantly higher than in IMRT IMRT; thin dashed line: A conformation number to quantify the degree of conformality in brachytherapy and external beam irradiation: PTV in red and rectum in brown: Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency.
Significant differences in IMRT for single- and double-arc plans were noted for total body dose D max: 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 comparable to that of fixed-field step-and-shoot IMRT for a variety of tumor sites. Cases with two implants had acceptable 2A plans in 6 of 16 cases.
The total body and rectum doses were better in favor of single-arc plans. All plans were evaluated based on elekya coverage, homogeneity and conformity. RapidArc, SmartArc and TomoHD compared with classical step and shoot and sliding window intensity modulated radiotherapy in an oropharyngeal cancer treatment plan comparison. The differences between single- and double-arc plans were small; significant differences in favor of elwkta were noted for the maximum dose in the PTV With the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required.
Impact of MLC leaf width on volumetric-modulated arc therapy planning for head and neck cancers. Detailed values and the averaged DVH comparison are shown in the Additional file 3.
Between the evaluated tumor regions and prescribed doses, differences were identified. An arc-sequencing algorithm for intensity modulated arc therapy.
Due to the low number of cases 6 left, 4 rightno statistical significance for the differences can be given.