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Dergiler / Politeknik Dergisi / 2022 / Cilt: 25 - Sayı: 1

Analysis of Radiation Dose Distribution Inhomogenity Effects in Gamma Knife Radiosurgery using Geant4

Özlem DAĞLI
Ayşe Güneş TANIR
PH.D.
Gökhan KURT
Sayfa
59–64
Yayın Tarihi
2022-03-01
DOI
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⚡ TL;DR(1 Cümlede Hızlı Çıkarım)

As a result, the inhomogeneity effect should be considered in dose calculation in Gamma Knife planning system.

📌 3 Maddede Bu Makale

🎯
Amaç & Hipotez:The Monte Carlo method is widely used in the Gamma Knife dose distribution calculations.
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Temel Bulgular & Veri:In this study, Monte-Carlo simulation with Geant4 was applied to determine Leksell Gamma Knife dose distribution for homogeneous solid water and heterogeneous brain phantoms, and primarily focused on the differences arising from the effects of inhomogeneity.
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Sonuç & Katkı:As a result, the inhomogeneity effect should be considered in dose calculation in Gamma Knife planning system.
🔬Tür:Araştırma Makalesi
📍Kapsam:Genişletilmiş Akademik Örneklem
⚙️Değişkenler:Radiosurgery · gamma knife · γ-rays

Özet

The Monte Carlo method is widely used in the Gamma Knife dose distribution calculations. In this study, Monte-Carlo simulation with Geant4 was applied to determine Leksell Gamma Knife dose distribution for homogeneous solid water and heterogeneous brain phantoms, and primarily focused on the differences arising from the effects of inhomogeneity. The relative dose graphs were displayed for different collimator diameters. The dose values from the maximal interval regions were determined and compared. It seen that when the collimator size was 4mm, the mean maximum relative dose point was at 47mm for water phantom and at 44mm for the brain. The difference found was about 6.38%. The differences among the results determined for water and brain were ranged from 2 to 17%. As a result, the inhomogeneity effect should be considered in dose calculation in Gamma Knife planning system.

Abstract

The Monte Carlo method is widely used in the Gamma Knife dose distribution calculations. In this study, Monte-Carlo simulation with Geant4 was applied to determine Leksell Gamma Knife dose distribution for homogeneous solid water and heterogeneous brain phantoms, and primarily focused on the differences arising from the effects of inhomogeneity. The relative dose graphs were displayed for different collimator diameters. The dose values from the maximal interval regions were determined and compared. It seen that when the collimator size was 4mm, the mean maximum relative dose point was at 47mm for water phantom and at 44mm for the brain. The difference found was about 6.38%. The differences among the results determined for water and brain were ranged from 2 to 17%. As a result, the inhomogeneity effect should be considered in dose calculation in Gamma Knife planning system.

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Bu Makaleye Atıf Yap

DAĞLI, Ö., TANIR, A. G., PH.D., P., KURT, G. (2022). Analysis of Radiation Dose Distribution Inhomogenity Effects in Gamma Knife Radiosurgery using Geant4. Politeknik Dergisi, Cilt: 25 - Sayı: 1, 59–64. https://ajindex.com/articles/422234

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Kaynakça (14)

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