Matrosic Charles, McMillan Alan, Holmes James, Bednarz Bryan, Culberson Wesley
The University of Wisconsin School of Medicine and Public Health, University of Wisconsin - Madison, Department of Medical Physics, Madison, WI.
The University of Wisconsin School of Medicine and Public Health, University of Wisconsin - Madison, Department of Radiology, Madison, WI.
J Phys Conf Ser. 2017;847. doi: 10.1088/1742-6596/847/1/012012. Epub 2017 Jun 5.
Normoxic Polyacrylamide Gels, or nPAGs, are 3D gel dosimeters that measure dose through the process of radiation-induced polymerization. Two nPAG formulae are DEFGEL and PAGAT, which are very similar, but differ mainly due to different weight fractions of monomers. The dosimetric resolutions of the two formulae when paired with a Spin-Echo (SE) MRI sequence and a monoexponential fit were compared over a range of 0-15 Gy. It was found that in the dose range 0-6 Gy the PAGAT formula generally showed a much finer dose resolution, while the DEFGEL formula showed a finer resolution from 8-15 Gy.
常氧聚丙烯酰胺凝胶（nPAGs）是一种三维凝胶剂量计，通过辐射诱导聚合过程来测量剂量。两种nPAG配方分别是DEFGEL和PAGAT，它们非常相似，但主要因单体重量分数不同而有所差异。在0 - 15 Gy范围内，比较了这两种配方与自旋回波（SE）MRI序列和单指数拟合相结合时的剂量分辨率。结果发现，在0 - 6 Gy剂量范围内，PAGAT配方通常显示出更精细的剂量分辨率，而DEFGEL配方在8 - 15 Gy范围内显示出更精细的分辨率。
