Journal of Korean Neurosurgical Society

  • 제66권4호
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  • Pages.476-481
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  • 2023
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  • 2005-3711(pISSN)
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  • 1598-7876(eISSN)
대한신경외과학회 (The Korean Neurosurgical Society)
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Avoiding a Collision in Gamma Knife Radiosurgery : A Modified Mask Fixation Method

  • Hyeong Cheol Moon (Department of Neurosurgery, Chungbuk National University Hospital) ;
  • Doheui Lee (Department of Neurosurgery, Asan Medical Center) ;
  • Byung Jun Min (Department of Radiation Oncology, Chungbuk National University Hospital) ;
  • Young Gyu Kim (Department of Neurosurgery, Chungbuk National University Hospital) ;
  • Yun-Sik Dho (Department of Neurosurgery, Chungbuk National University Hospital)
  • 투고 : 2022.07.13
  • 심사 : 2022.11.22
  • 발행 : 2023.07.01
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초록

Objective : The latest version of the Leksell Gamma Knife IconTM allows for mask- and frame-based fixation. Although mask fixation provides fractionated treatment and immobilization using a noninvasive method, it is not free from collision. The authors investigated the collision problem with a modified mask fixation method. Methods : This study presents a case of two meningiomas in the frontal area, where a collision occurs in the occipital area. A modified mask fixation method was introduced to avoid the collision : first, the edges of the head cushion were cut off and polystyrene beads with a diameter of approximately 5 cm were removed. Next, the head cushion was sealed using a stapler. Finally, the head cushion was flattened in the adapter. We compared the shot coordinates, 3-dimensional (3D) error, clearance distance, and vertical depth of the head cushion between the initial and modified mask fixations. Results : When comparing the initial and modified mask fixations, the difference in the shot coordinates was +10.5 mm along the y-axis, the difference in the 3D error was approximately 18 mm, and the difference in clearance was -10.2 mm. The head cushion was approximately 8 mm deeper in the modified mask fixation. Conclusion : Based on these findings, we recommend a modified mask fixation method for gamma knife radiosurgery using ICON with a collision.

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과제정보

This research was supported by Chungbuk National University Korea National University Development Project (2022).

참고문헌

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