ELEKTA VMAT PDF

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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University Medical Center Mannheim, Germany: Open in a eleita window. This finding indicates that in complex cases with up to three different dose levels PTV1, PTV2, PTV3the use of a generally valid vmah cannot be eleekta to produce an ideal dose bmat without further individual adaptations. All plans were evaluated based on target coverage, homogeneity and conformity. Received Mar 13; Accepted Jun MLCs with smaller widths may improve the plan quality for such cases [ 28 – 30 ].

These techniques have given clinicians the flexibility to deliver conventional therapies to treat a wide range of tumors throughout the body, while also enabling treatment of highly complex cancers that require extreme targeting precision. After modifying the optimization penalties, no improvements could be identified for either the target volume or the OAR. In addition, the template-based planning approach demonstrates that with minimal effort, clinically acceptable plans can be generated.

Detailed values and the averaged DVH comparison are shown in the Additional file 5. Plans with brain tumors showed similar behavior: Intensity-modulated arc therapy simplified. For the single-arc technique, 8 plans met the objectives, 9 after modification. The median dose of the sub-dose levels was significantly higher than in IMRT Between the evaluated tumor regions and prescribed doses, differences were identified.

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

The study was performed based on ethical board approval Ethics Committee St. Intensity-modulated radiotherapy and volumetric-modulated arc therapy for malignant pleural mesothelioma after extrapleural pleuropneumonectomy.

In all cases, the isocenter was placed in the center of the PTV. 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.

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The purpose of this study was to evaluate this algorithm for different disease sites by creating single- and double-arc VMAT plans. The dynamic arc plans are compared to clinical step-and-shoot IMRT plans on a statistical basis. Methods 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.

For the single-arc technique 1Asix plans were acceptable after adapting 1Am nine. Comparing single- and double-arc plans, all parameters except MUs exhibited differences in favor of the double-arc technique, and differences in the parameters for PTV coverage, maximum dose in the bladder and rectum were statistically significant.

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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. 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. The differences between single- and double-arc plans were small: With the use of templates, acceptable plans are easy to generate and minimal operator experience or interaction is required.

Mean DVHs of 18 prostate cancer cases with two hip implants. elketa

Elekta VMAT Radiation Therapy Rapidly Gaining Users Worldwide As Technique Evolves

Dosimetric effects of multileaf collimator leaf width on intensity-modulated radiotherapy for head and neck cancer. D max of the PTV 1A: The newest release of the Eclipse TPS v. The organs at risk OARs were analyzed according to plan objectives, such as the mean and maximum doses. 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.

Varian Medical systems, Inc. Clinicians can use Elekta VMAT with complete or partial arc s to reduce treatment times from the minutes required for conventional radiation therapy to as few as two minutes. Nontumor integral dose variation in conventional radiotherapy treatment planning. It also is beneficial for patients whose pain makes prolonged treatment sessions undesirable.

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The dose calculation was performed using the anisotropic analytic algorithm AAA [ 25 ] and a grid size of 2.

Coplanar versus noncoplanar intensity-modulated radiation therapy IMRT and volumetric-modulated arc therapy VMAT treatment planning for fronto-temporal high-grade glioma. Its rich, intuitive tools make the radiotherapy eekta process faster, easier and clinically reliable. Click here for file 96K, pdf. Volumetric-modulated arc radiotherapy for carcinomas of the anal canal: As the number of MUs per treatment is correlated with the amount of scatter dose and leakage radiation, which could be important based on the induction of secondary malignancies [ vmaat33 ], a decrease in the number of MUs achieved with VMAT is desirable.

Table 1 Planning objectives for organs at risk and target volumes. The entire treatment takes just 10 minutes, encompassing fmat room entry, imaging of the patient on the table to adjust treatment positioning, seconds of VMAT beam-on-time and patient room exit.

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.

Cases with target doses of Development and evaluation of an efficient approach to volumetric arc therapy planning. Due to the low number of cases 6 left, 4 rightno statistical significance for the differences can be given. However, the sparing of OARs shows individual behavior that depends strongly on the different tumor regions.

Depending on the tumor region, 5 to 9 coplanar fields were chosen, consistent with our clinical standard section II. Volumetric modulated arc radiotherapy for cmat of the oro-pharynx, hypo-pharynx and larynx: But the differences depend strongly on the tumor region: Plans with two arcs show better dose distributions than plans with one arc. The calculation times — often a disadvantage of VMAT planning [ 91013 ] — do vnat show large differences:

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