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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The head frame, with the patient, is then fastened to the treatment couch.

Leksell Gamma Knife® Perfexion™

The gamma angle is the only treatment parameter that requires manual set up. Accuracy of coincidence of radiological focal point and PPS mechanical isocenter was verified for the 4 mm collimator using the film technique described in the Pdrfexion and Methods section.

Perfexlon comparison of the gamma knife model C and the automatic positioning system with Leksell model B. Dose plans for the Leksell Gamma Knife Models B, 4C, and Perfexion have been created for target pathologies to illustrate how the software and hardware of the new radiosurgical system can increase treatment quality, decrease treatment time, and increase patient comfort. If you originally registered with a username please use that to sign in.

Equally knie accuracy and ease of use for frame-based or frameless treatments, and for single or multiple targets. The gradient index GI provides a measure of spread of low dose outside TV into the surrounding healthy tissue. This article has been cited by other articles in PMC. The docking of the patient into the PPS is done by means of a frame adapter that attaches to the standard stereotactic Leksell G kjife with the help of three clips.

Icon is the only technology with microradiosurgery capabilities allowing for the treatment of virtually all disorders in the brain with ultrahigh precision. For the same reason, the number of patients scheduled for treatment on LGK PFX more than doubled the number of patients scheduled for treatment on the 4C unit.


A simple scoring ratio to index the conformity of radiosurgical treatment plans. Receive exclusive offers and updates from Oxford Knnife. In addition to importing into MOSAIQ treatment plans and treatments records generated by Gamma Knife, users can automate the billing and scheduling processes and save valuable time and resources.

Physics of Gamma Knife approach on convergent beams in stereotactic radiosurgery. Lekssll result is improved image quality for better image guidance. Open in a separate window. Before exposing the films to radiation, the films were punched with a needle.

You do not currently gamam access to this article. BhatnagarJosef Novotny, Jr. In lejsell to the diode measurements, film method was also used. Neuroscience accessories ecatalog The flexible way to find more details and information on our products Browse. Keeping a high score of PCI indicates good conformity of a treatment plan and keeping a low value of GI indicates low dose to the surrounding tissue. This diode detector can scan X, Y, Z profiles for 4, 8 or 16 mm collimators and dosimetric center for each axis can be calculated from the three measured profiles.

The Leksell Gamma Knife Perfexion and comparisons with its predecessors.

Pathologies previously inaccessible in the head and neck are now treatable due to the increased volume of the radiation cavity. Radiosurgery with the world’s first fully robotized Leksell Gamma Knife Perfexion in clinical use: This article is also available for rental through DeepDyve.

Series of 28 Cases.

Because 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. The automated collimator arrangement in the Perfexion makes it possible to produce more complex treatment volumes than with previous models of the gamma knife.

Paddick suggested that the definition of CI as given in Eqn. B Detailed view of sectors; each sector holds 24 60 Co sources and can be moved independent of other sectors in desired position to define a collimator size or to block beams.

Paddick I, Lippitz B. Sign In or Create an Account. This superior collimation was achieved by having only one collimator made of mm thick tungsten ring, compared to a thicker collimating system of B, C and 4C models, which consist of primary and secondary collimators.


The mm thick tungsten collimator ring is subdivided into eight identical regions, each region containing 72 collimators 24 collimators for 4 mm, 24 collimators for 8 mm, and 24 collimators for 16 mm.

This section gives a very brief description of a variety of tests which were conducted for the acceptance and commissioning of the unit. Total treatment time on the LGK PFX even for patients with very complex treatments brain tumors never exceeded two hours. Physical Aspects of Stereotactic Radiosurgery. Today, Gamma Knife surgery is performed in hundreds of leading hospitals and clinics around the world. Due to the convenience of automated set up and efficiency of treatment without physically changing collimators and using trunnions, LGK PFX became the unit of choice for the treatment of multiple metastases or targets with complex shape or larger volume.

Calibration doses used for EBT film ranged from 0 to 8 Gy a total of ten calibration points were obtained. Comprehensive QA for radiation oncology. The new design features of the system offer many dosimetric capabilities to create highly conformal treatment plans.

However, the median reduction in set-up time for treatment of multiple metastases on the LGK PFX was 53 min per patient range min which was statistically significant p less than 0.

Nil Conflict of Interest: Leksell Gamma Knife Icon is the most precise radiosurgery device on the market, limiting radiation dose to healthy tissue.

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Leksell Gamma Knife® Icon™

The most significant change seen in treatment planning is the ability to generate a single isocenter composed of different beam diameters. Absolute dose output at the center of mm diameter polystyrene calibration phantom for 16 mm collimator. This result was much better than manufacture required specification 0. Most users should sign in with their email address.