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.

在这项研究中，开发了含有N-（羟甲基）丙烯酰胺（NHMA）和不同浓度的氯化钾（KCl）的聚合物凝胶剂量计，并将其引入放射治疗。使用医用线性加速器用高达10 Gy的兆伏X射线光子束辐照凝胶。通过核磁共振（NMR）以弛豫率（R ₂）评估辐照的NHMA_KCl剂量计。结果表明，当KCl浓度从0增加到1.9 wt％时，聚合物凝胶的剂量敏感性提高了33％。R ₂的减少扫描温度升高时，在6 Gy时，每°C的数值为1.6％。发现剂量计在辐照后2–120 h内稳定，并且与剂量率在50–600 cGy / min范围内无关，并且与在7％总体不确定性范围内6至15 MV之间的光子束能量无关。