NDLI: Features of $PABIG^{nx}$ 3D Polymer Gel as an Ionising Radiation Dosimeter

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Features of $PABIG^{nx}$ 3D Polymer Gel as an Ionising Radiation Dosimeter

Content Provider	MDPI
Author	Kozicki, Marek Jaszczak, Malwina Maras, Piotr
Copyright Year	2022
Description	This work presents the features of the $PABIG^{nx}$ 3D polymer gel dosimeter. It consists of two cross-linkers: poly(ethylene glycol) diacrylate (PEGDA), as one biacrylic component, and N,N′-methylenebisacrylamide (MBA), which is another cross-linker often used in 3D dosimeters. Additionally, it contains oxygen scavenges of copper sulfate pentahydrate and ascorbic acid. All ingredients are embedded in a physical gel matrix of gelatine. Upon irradiation, the biacrylic cross-linking agents (PEGDA and MBA) undergo radical polymerisation and cross-linking, which is manifested by the appearance of the opacity of the intensity related to the absorbed dose. $PABIG^{nx}$ was irradiated with an oncological source of ionising radiation, and analysed by using a nuclear magnetic resonance (0.5 T). The following characteristics were obtained: (i) linear and dynamic dose-response of 0.5 to ~18 Gy and 40 Gy, respectively, (ii) dose sensitivity of 0.071 ± 0.001 $Gy^{−1}$ $s^{−1}$, (iii) integral 3D dose distribution for at least 24 days after irradiation, (iv) adequate batch-to-batch reproducibility, (v) dose-response independent of irradiation with 6 MV photons, 15 MV photons, 6 MV photons FFF of 0.0168–0.1094 Gy/s dose rates, and (vi) soft tissue equivalence. The study showed that the features of $PABIG^{nx}$ confirm its suitability for use in 3D radiotherapy dosimetry.
Starting Page	2550
e-ISSN	19961944
DOI	10.3390/ma15072550
Journal	Materials
Issue Number	7
Volume Number	15
Language	English
Publisher	MDPI
Publisher Date	2022-03-31
Access Restriction	Open
Subject Keyword	Materials Radiology, Nuclear Medicine and Imaging Pabignx 3d Polymer Gel Dosimetry Radiotherapy Dosimetry Ionising Radiation
Content Type	Text
Resource Type	Article

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