Characteristic and quality control test in sector collimator gamma knife perfexion at Siloam hospital

Manik, Jhon Wesly; Hidayanto, Eko; Sutanto, Heri

doi:10.1088/1742-6596/795/1/012010

Cited by 1 publication

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“…Previous studies have shown accurate spatial dose delivery with G-frames [1][2][3][4]. For single isocenter treatment, the mean displacement vector of the peak position was found to be of 0.4 mm and 0.6 mm for CT and MRI-based simulation respectively [1].…”

Section: Introductionmentioning

confidence: 85%

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife

Vincent¹,

Michel-Amadry²,

Nigoul³

et al. 2023

Biomed. Phys. Eng. Express

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Purpose: Since January 2021, the Leksell® Vantage head frame (V-frame) is used for Gamma Knife® treatments in addition to the historical Leksell® G-Frame known as the reference. The aim of this study was to compare the spatial accuracy of treatments with these two frames. Methods: Firstly, the constancy of the geometric accuracy of the system according to the Elekta quality assurance process was carried out during sixteen months with V and G–frames’ adaptors. Then, End-to-end test was carried out with both V and G-frame using an anthropomorphic phantom and Gafchromic® films. The overall precision of the radiation center was calculated as the displacement vector for a 4mm collimator shot. Additionally, the Cone Beam Computed Tomography (CBCT) positioning system was used to assess the precision of the Leksell coordinates system defined by V-frames on 64 patients in comparison with G-frames for 46 patients. To ensure that patient’s head movement was not possible during treatment with the V-frame, a final CBCT was performed at the end of the irradiation. Results: The QA constructor’s tests done with the G-frame and V-frame adaptor gave similar results over sixteen months. End-to-end tests demonstrated that the mean positioning accuracy were 0.54mm (SD of 0.14mm) and 0.70mm (SD of 0.14mm) with V-frame and G-frame respectively. The displacement vector given by CBCT ranged from 0.02 to 1.05mm with a mean value of 0.38mm (SD of 0.18mm) for the 64 V-framed patients and from 0 to 0.92mm with a mean value of 0.31 mm (SD of 0.18mm) for the 46 G-framed patients. The mean translation movement between the beginning and the end of the 64 treatments with V-frame was 0.08mm (SD of 0.04mm, maximum value of 0.19mm). Conclusion: We estimated that V-frames are as precise as G-frames with a targeting accuracy of less than 1mm.

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Section: Introductionmentioning

confidence: 85%

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife

Vincent¹,

Michel-Amadry²,

Nigoul³

et al. 2023

Biomed. Phys. Eng. Express

View full text Add to dashboard Cite

show abstract

Characteristic and quality control test in sector collimator gamma knife perfexion at Siloam hospital

Cited by 1 publication

References 0 publications

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife

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Characteristic and quality control test in sector collimator gamma knife perfexion at Siloam hospital

Cited by 1 publication

References 0 publications

Spatial accuracy of the stereotactic Leksell® Vantage™ head frame in comparison with the standard stereotactic Leksell® G Frame for Gamma-Knife

Spatial accuracy of the stereotactic Leksell® Vantage™ head frame in comparison with the standard stereotactic Leksell® G Frame for Gamma-Knife

Contact Info

Product

Resources

About

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife

Spatial accuracy of the stereotactic Leksell^® Vantage™ head frame in comparison with the standard stereotactic Leksell^® G Frame for Gamma-Knife