Journals / Türk Onkoloji Dergisi / 2009 / Cilt: 24 - Sayı: 1

The effect of stopping power ratios of different protocols on %DD curve

Farklı protokollerdeki durdurma gücü oranlarının %DD eğrisine etkisi

Pages
15–20
Publication Date
2022-11-05
DOI
—
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⚡ TL;DR(Too Long; Didn't Read)

The maximum difference was 1.45% at 10 MeV, while the minimum difference was 0.09% at 6 MeV.CONCLUSION Stopping power ratios as found using realistic electron beams provide more accurate surface doses, as reported in the literature.

📌 3 Key Takeaways

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Objective & Hypothesis:OBJECTIVES The effects of the stopping power ratios of different protocols on %DD curve were investigated in this study.METHODS Percentage ionization curve was measured at SSD=95 cm using 10x10 standard cone and 6, 8, 10, 12, 15 and 18 MeV electron energies.
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Key Findings & Data:The stopping power ratios of the different protocols were determined and plotted against R50.RESULTS The stopping power ratios of the different protocols did have an effect on %DD curves.
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Conclusion & Impact:The maximum difference was 1.45% at 10 MeV, while the minimum difference was 0.09% at 6 MeV.CONCLUSION Stopping power ratios as found using realistic electron beams provide more accurate surface doses, as reported in the literature.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

OBJECTIVES The effects of the stopping power ratios of different protocols on %DD curve were investigated in this study.METHODS Percentage ionization curve was measured at SSD=95 cm using 10x10 standard cone and 6, 8, 10, 12, 15 and 18 MeV electron energies. Stopping power ratios at each depth were determined as recommended by the three protocols. %DD curves were then found and compared. The stopping power ratios of the different protocols were determined and plotted against R50.RESULTS The stopping power ratios of the different protocols did have an effect on %DD curves. The clearest difference was seen at the surface. The maximum difference was 1.45% at 10 MeV, while the minimum difference was 0.09% at 6 MeV.CONCLUSION Stopping power ratios as found using realistic electron beams provide more accurate surface doses, as reported in the literature.

Özet

AMAÇ Bu çalışmada, farklı SW, HAVA'ların %DD eğrilerine yaptığı etki araştırıldı.GEREÇ VE YÖNTEM Lineer hızlandırıcı cihazında 6, 8, 10, 12, 15 ve 18 MeV elektron enerjilerinde, SSD 95 cm'de 10x10 cm standart elektron konu için yüzde iyonizasyon değerleri ölçüldü. Her derinlik için durdurma gücü oranları üç protokolün belirttiği şekilde bulundu ve bu değerler yüzde iyonizasyon değerleri ile çarpılarak yüzde derin doz grafiği elde edildi. Üç protokolden elde edilen grafikler birbirleri ile karşılaştırıldı. Ayrıca farklı protokoller için bulunan durdurma gücü oranları birbirleri ile kıyaslanarak R50 karşı grafikleri çizildi.BULGULAR Kullanılan farklı durdurma gücü oranlarının yüzde derin doz eğrilerinde farklılıklara neden olduğu görülmüştür. En fazla değişim yüzey dozlarında meydana gelmiştir. En büyük fark 10 MeV enerjisinde E0'a göre hesaplanmış TRS 381/TRS 277 farkı %1, 45'dir. En az fark ise 6 MeV enerjisinde RP'ye göre hesaplanmış TRS 398/TRS 277 farkı %0, 09'dur.SONUÇ Realistik elektron demetleri için bulunmuş durdurma gücü oranlarını kullanmak literatürlerde de belirtildiği gibi yüzey dozlarını daha doğru şekilde değerlendirmemizi sağlamaktadır.

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Cite This Article

ACAR, H. (2022). The effect of stopping power ratios of different protocols on %DD curve. Türk Onkoloji Dergisi, Cilt: 24 - Sayı: 1, 15–20. https://ajindex.com/articles/639319

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