Escalation of optical transmittance and determination of diffusion co-efficient in low-bloom strength gelatin-based Fricke gel dosimeters

Characterization of radiochromic poly(vinyl-alcohol)–glutaraldehyde Fricke gels for dosimetry in external x-ray radiation therapy

“…Among the various strategies proposed for limiting this drawback [14][15][16], recently, formulations based on gel matrices of poly(vinyl-alcohol) (PVA) chemically crosslinked with glutaraldehyde (GTA) have shown improvements as compared to FGs with natural matrices [17,18]. Accordingly, the interest toward PVA-GTA FG dosimetry is gaining importance, as attested to by the increasing literature about this topic [19][20][21][22][23][24][25][26][27].…”

Does the gelation temperature or the sulfuric acid concentration influence the dosimetric properties of radiochromic PVA-GTA Xylenol Orange Fricke gels?

“…In fact, some drawbacks of FG dosimeters still represent challenges to overcome, making these systems an interesting topic of research. Firstly, irradiated FG dosimeters suffer from a gradual blurring over time of the spatial radiation dose patterns due to the diffusion of ferric ions, which eventually destroys the information on 3D dose distribution (Olsson et al, 1992;Rae et al, 1996;Babu et al, 2019). Secondly, the dose-response of FG dosimeters is known to depend significantly on several elements that characterize their manufacture, including purity and composition of chemical reagents, as well as processing parameters during preparation and gelation (Del Lama et al, 2017).…”

Impact of Salt on Thermal Stability and Dose Response of the Fricke-XO-Pluronic F-127 3D Radiotherapy Dosimeter

“…It allows for significant reduction in the diffusion of irradiation products from the irradiated to the non-irradiated area of the dosimeter. Over the years, the most popular were gel matrices made of natural and synthetic polymers, such as gelatin [ 10 , 11 , 12 ] and agarose [ 13 , 14 ] as natural polymers, and poly(vinyl alcohol) PVA [ 15 , 16 ] corresponding to synthetic polymers. Gelatin shows high transparency, much higher than agarose.…”