Experts around the world – including NJ, NYC and the rest of the Tristate area – are choosing the Leksell Gamma Knife Icon system to treat. OBJECTIVE: The objective of this study is to introduce a new radiosurgical device , the Leksell Gamma Knife Perfexion (Elekta Instruments AB, Stockholm. A new model of Leksell Gamma Knife® (LGK), known as Perfexion™ (LGK PFX), was introduced by Elekta Instrument, AB, Sweden, in This model has a.
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In PPS, instead of moving only the patient’s head, the whole body of the patient lying on the PPS is moved into the pre-selected stereotactic coordinates. The Perfexion exceeds the capabilities of previous gamma knife models in terms of treatment efficiency, conformity, and radiation protection.
The automated collimator arrangement in the Perfexion makes it possible to produce more complex treatment volumes than with previous models of the gamma knife. National Center for Biotechnology InformationU.
Leksell Gamma Knife® Icon™
The radically new design of LGK PFX has had a great impact on the treatment planning software and the treatment knlfe.
E Sector position which defines a 16 mm collimator.
Combined, these features increase the number of patients who can benefit from Gamma Knife surgery. Lekdell treatment time on the LGK PFX even for patients with very complex treatments brain tumors never exceeded two hours. The measured deviations by film method in the stereotactic coordinates were found to be as follows: The beam size for each region is changed automatically by moving 24 sources over selected collimator set.
Lindquist C, Paddick I. Comprehensive QA for radiation oncology. The indices discussed in this appendix are useful tools to compare competing treatment plans for the same patient. No other non-invasive treatment method in this field has greater clinical acceptance. Maitz AH, Wu A.
The gamma angle is the only treatment parameter that requires manual set up. Ganma of the increased treatment range for the LGK PFX system, the treatment of multiple brain tumors such as brain metastases does not present any difficulty in terms of collision with the collimator system. Oxford University Press is a department of the University of Oxford. Pathologies previously inaccessible in the head and neck are now treatable due to the increased volume of the radiation cavity.
Excellent agreement to within 0.
This results in significantly lower extra cranial radiation to the patient compared to the earlier models U, B, C and 4C. If you continue to use this site we will assume that you are happy with it.
The result is improved image quality for better image guidance.
The diode test tool yielded results for radial deviation of the central diode position that were well within the manufacturers recommended values. This is an outpatient procedure that is completed in one day. The measured FWHMs were found to be within 0. Acceptance, Commissioning and Quality Assurance for LGK PFX This section gives a very brief description of a variety of tests which were conducted for the acceptance and commissioning of the unit. This section gives a very brief description of a variety of tests which were conducted for the acceptance and commissioning of the unit.
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The sector movement is performed by servo-controlled motors with linear scales located at the rear of the radiation pefrexion.
Non-uniform output from the sectors will affect the isodose pattern during irradiation but such an effect will not be accounted for by the Leksell GammaPlan software, which assumes output from each sector to be uniform.
Appendix A Conformity index Knigepaddick conformity index PCI and gradient index GI The indices discussed lemsell this appendix are useful tools to compare competing treatment plans for the same patient. A simple dose gradient measurement tool to complement the conformity index. Sunnybrook Health Sciences Centre- A distributed and efficient method to treat multiple mets. Planned dose equals delivered dose with guaranteed system accuracy over lifetime of device 1.
Support Pwrfexion Support Gammma.
This article has been cited by other articles in PMC. As each shot with LGK PFX consists of gamma ray beams coming from eight sectors and each sector has either 4, 8 or 16 knnife collimation or complete beam blocking, there are now three possible approaches to the treatment planning: Author information Article notes Copyright and License information Disclaimer.
This results from the enhanced ability to shape isodose volumes, even for single isocenters.