Improved performance of N-(Hydroxymethyl)acrylamide gel dosimeter using potassium chloride for radiotherapy

被引：17

作者：

Rabaeh, Khalid A. ^{[1
]}

Hammoudeh, Issra' M. E. ^{[2
]}

Eyadeh, Molham M. ^{[3
]}

Aldweri, Feras M. ^{[4
]}

Awad, Samer, I ^{[5
]}

Oglat, Ammar A. ^{[1
]}

Shatnawi, Moneeb T. M. ^{[2
]}

机构：

[1] Hashemite Univ, Fac Appl Med Sci, Med Imaging Dept, Zarqa 13133, Jordan

[2] Univ Jordan, Sch Sci, Phys Dept, Amman 11942, Jordan

[3] Yarmouk Univ, Fac Sci, Phys Dept, Irbid 21163, Jordan

[4] Hashemite Univ, Fac Sci, Phys Dept, Zarqa 13133, Jordan

[5] Hashemite Univ, Fac Engn, Biomed Engn Dept, Zarqa 13133, Jordan

来源：

RADIATION MEASUREMENTS | 2021年 / 142卷 / 142期

关键词：

Dosimeter; N-(Hydroxymethyl)acrylamide; Potassium chloride; Gel; Radiotherapy;

D O I：

10.1016/j.radmeas.2021.106542

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

In this study, polymer-gel dosimeters containing N-(Hydroxymethyl) acrylamide (NHMA) with different concentrations of potassium chloride (KCl) were developed and introduced for use in radiotherapy. The gels were irradiated with a megavolt X-ray photon beam up to 10 Gy using a medical linear accelerator. The irradiated NHMA_KCl dosimeters were evaluated by nuclear magnetic resonance (NMR), in terms of relaxation rate (R2). The results show that the dose sensitivity of polymer gel was improved by 33% when KCl concentration was increased from 0 to 1.9 wt%. The decrease in R2 values with increasing scanning temperature was 1.6% per ?C at 6 Gy. The dosimeter was found stable within a period of 2?120 h after irradiation and is independent of dose-rate in the range of 50?600 cGy/min and independent of photon beam energy between 6 and 15 MV within 7.5% overall uncertainty.

引用

页数：5

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