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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Clinically acceptable target dose coverage was difficult to achieve with a single-arc technique; however, it was possible with two arcs. J Appl Clin Med Phys. The mean dose for the heart seems to show a statistically significant improvement for single arc plans IMRT: The OARs met the clinical objectives in all cases for all techniques.
Implementing IMRT in clinical practice: Learn more about our solutions below and how they can expand your clinical practice. Effects of flattening filter-free and volumetric-modulated arc therapy delivery on treatment efficiency. 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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Kantonsschule am Burggraben St. Single-arc plans had smaller improvements in comparison to IMRT, with significant differences only for D max Coplanar versus noncoplanar intensity-modulated radiation therapy IMRT and volumetric-modulated arc therapy VMAT treatment planning for fronto-temporal high-grade glioma.
Single and double arc plans before 1A, 2A and after modification 1Am, 2Am of the optimization penalties; values are expressed as the mean range. Monaco delivers high performance and high precision radiotherapy treatment planning for all major treatment techniques for photon and electron based plans.
It also is beneficial for patients whose pain makes prolonged treatment sessions undesirable. Support Center Support Center. Prostate cases A total of 45 prostate cases were analyzed, of which 11 involved pelvic lymph nodes, 16 involved one hip implant and 18 involved two hip implants.
The maximum dose in the lips was statistically significant lower for VMAT up to Due to the low number of cases 6 left, 4 rightno statistical significance for the differences can be given. The dose coverage in the target volumes was better for all VMAT techniques.
The purpose of this study was to evaluate this new algorithm and to compare it to intensity-modulated radiation therapy IMRT for various disease sites by creating single- and double-arc VMAT plans. The calculation times — often a disadvantage of VMAT planning [ 91013 bmat — do not show large differences: With a comprehensive choice of delivery systems, Elekta is the ideal partner for ensuring that each clinic and patient receives the best system and treatment vmag their needs.
Of the 38 cervical and endometrial cases for the double-arc technique, 19 were in tolerance for both OAR sparing and PTV coverage; after adapting the optimization penalties, 23 plans met all objectives.
Physicians can visualize the tumor target at the time of treatment and guide therapy that increases radiation dose to the target while reducing exposure elwkta surrounding healthy tissues. 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.
IMRT; thin dashed line: Double-arc plans with one implant were acceptable in 11 of the 18 total cases and in 14 cases after adapting the optimization penalties. 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 Cervical and endometrial cases Of the 38 cervical and endometrial cases for the double-arc technique, 19 were in tolerance for both OAR sparing and PTV coverage; after adapting the optimization penalties, 23 plans met all objectives.
Gallen, Rorschacherstrasse 95, St. Double-arc plans showed a significant reduction of high-dose regions in the small intestine V 45 Gy: For most non-acceptable plans, the following values were out of tolerance: 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 ].
An arc-sequencing algorithm for intensity modulated arc therapy. Discussion 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 ].
Elekta VMAT – Peninsula Cancer Center
Nontumor integral dose variation in conventional radiotherapy treatment planning. The differences between single- and double-arc plans were small: A comparison of single- and double-arc plans revealed highly significant differences in favor of 2A in target coverage and the maximum bladder dose.
PTV in red and rectum in brown: To visualize the differences, average cumulative DVHs were calculated per examined tumor region for each organ and treatment technique. 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: The purpose of this study was to evaluate this algorithm for different disease sites by creating single- and double-arc VMAT plans.
In a comparison of single- and double-arc techniques, the PTV coverage was significantly different for plans with two arcs. Table 1 Planning objectives for organs at risk and target volumes.
Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves
Supplementary Material Additional file 1: IMRT also improves plan quality; the fixed gantry angles can be placed systematically to avoid irradiation through certain regions with such small structures.