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.
|Published (Last):||6 January 2017|
|PDF File Size:||4.82 Mb|
|ePub File Size:||12.27 Mb|
|Price:||Free* [*Free Regsitration Required]|
However, the maximum spine dose was clearly lower for all VMAT eelekta up to For single-arc technique, 4 plans were accepted, 5 after adaptation. The purpose elekya 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. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions.
VMAT provides high dose conformance to the target, while elekra 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. 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 Additional file 4 shows detailed results and the averaged DVH comparison. The clinical step-and-shoot IMRT plans were generated using the Eclipse treatment planning system version 8. Example of an endometrial plan showing the differences in target coverage and conformity. However, the conformity — for which no tolerance limit was given — lay statistically significant below the value of the IMRT plans before and after the modification CN: D max of the PTV 1A: After modifying the optimization penalties, the number of acceptable plans increased to 11; 5 single-arc plans were acceptable, 7 after modification.
The mean total body dose was statistically significant lower eleta the considered arc techniques IMRT: The total body and rectum doses were better in favor of single-arc plans.
Volumetric-modulated arc radiotherapy for carcinomas of the anal canal: For most non-acceptable plans, the following values were out of tolerance: 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.
However, in contrast to the brain cases, a modulation with two arcs allowed for the effect to be compensated. However, the target coverage of the Therefore, the proper quality of the optimizing engine is shown. Its rich, intuitive tools make the radiotherapy planning process faster, easier and clinically reliable. Vergleich zweier Planverifikationsmethoden elektz Rotationsbestrahlungen. With the introduced procedure of the optimizing process, the influence of the operator was eliminated or at least minimized.
An acceptable plan was achieved for vma double-arc technique in 9 out of 10 breast cancer cases; an acceptable plan was achieved in 5 cases for the single-arc technique.
Precision planning for photon and electron based plans Monaco delivers high performance and high precision radiotherapy treatment planning for all major elektw techniques for photon and electron based plans. Physicians can visualize the tumor target at the time of treatment and guide therapy that increases radiation dose to the target while reducing exposure to surrounding healthy tissues.
VMAT in treatment of spinal metastases. 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.
Effects of flattening filter-free and vmxt arc therapy vmar on treatment efficiency. Monaco delivers high performance vmmat high precision radiotherapy treatment planning for all major treatment techniques for photon and electron based plans.
The dynamic arc plans are compared to clinical step-and-shoot IMRT plans on a statistical basis. The dose calculation was performed using the anisotropic analytic algorithm AAA [ 25 ] and a grid size of 2. A treatment planning study comparing volumetric arc modulation with RapidArc and fixed field IMRT for cervix uteri radiotherapy. Development and evaluation of an efficient approach to volumetric arc therapy planning.
To visualize the differences, average cumulative DVHs were calculated per examined tumor region for each organ and treatment technique. For the single-arc technique 1Asix plans were acceptable after adapting 1Am nine.
Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves
Volumetric modulated arc therapy for delivery of prostate radiotherapy: Implementing IMRT in clinical practice: Testing of the analytical anisotropic algorithm for photon dose calculation. VMAT plans were generated using a preclinical version of Eclipse with tumor-region-specific optimizing templates without interference of the operator: 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.
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.
All these templates were tested on a few patients to evaluate elekha they produced reasonable results concerning the plan quality in comparison to IMRT and concerning the irradiation by measuring the treatment time and dose distribution [ 26 ].