A method for obtaining three-dimensional measurements of HDR brachytherapy dose distributions using Fricke gel dosimeters and optical computed tomography

Asena, Andre; Nilsson, Sanna; Smith, Shaun; Kairn, Tanya; Crowe, Scott; Trapp, Jamie

doi:10.1007/s13246-018-0715-y

Cited by 4 publications

(3 citation statements)

References 27 publications

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“…There are also indicators that documents might be categorised quite differently amongst journals, and naming may be confusing. For example, for Australasian Physical & Engineering Sciences in Medicine, under the Notes category Scopus includes items such as an introduction to conference abstracts [4], whereas technical notes, educational notes and scientific notes, which are all peer reviewed scientific articles, are counted as articles [5][6][7][8][9] despite the naming. Thus, the nomenclature of article types themselves may lead to unintended effects on CiteScore.…”

Section: Effect Of Article Typesmentioning

confidence: 99%

The new Scopus CiteScore formula and the Journal Impact Factor: a look at top ranking journals and middle ranking journals in the Scopus categories of General Physics and Astronomy, Materials Science, General Medicine and Social Sciences

Trapp

2020

Phys Eng Sci Med

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In June 2020 Elsevier announced that the CiteScore metric of journals underwent a change. This work examines the effect of these changes for 40 journals, chosen from the top five and middle five (ranked by CiteScore) journals in the subject areas of General Physics and Astronomy, Materials Science, Medicine, Social Sciences) and compares to the Journal Impact Factor. It is shown that in the data studied here, the new methodology is less susceptible to influence of the proportion of editorial material in a journal, but tends to favour journals in research fields that publish articles which get cited more quickly.

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Section: Effect Of Article Typesmentioning

confidence: 99%

The new Scopus CiteScore formula and the Journal Impact Factor: a look at top ranking journals and middle ranking journals in the Scopus categories of General Physics and Astronomy, Materials Science, General Medicine and Social Sciences

Trapp

2020

Phys Eng Sci Med

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“…More details can be found in the paper by Silveria and collaborators (Silveira et al 2022). When OT is applied to Fricke gel dosimeters, changes in the gel matrix optical properties induced by ionizing radiation can be detected by changes in the Fricke dosimeter attenuation coefficient, which is directly related to the absorbed dose (Asena et al 2019). The high spatial resolution and realtime monitoring capabilities of OT make it a powerful tool for three-dimensional dosimetry applications, particularly in radiation therapy, where precise and accurate dose measurements are critical (Jordan et al 2013, Silveira et al 2022.…”

Section: Introductionmentioning

confidence: 99%

Assessment of dosimetric sensitivity enhancement of xylenol orange Fricke gel by AuNPs: optical and MR imaging investigation

Lima,

Silveira,

Pavoni

et al. 2023

Phys. Med. Biol.

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Metallic nanoparticles, such as gold and silver nanoparticles (AuNPs and AgNPs, respectively),possess strong surface plasmonic resonance (SPR) and high atomic number, which makes them ideal candidates for enhancing dosimeter sensitivity. In this study, we have inserted different mass percentages (from 0 to 0.015%) of AuNPs into a gelatinous Fricke-Xylenol-Orange (FXO-f) gel matrix and irradiated it with doses ranging from 0 to 32Gy, using a source of X-ray of low energy. Optical absorption increased significantly; sensitivity gains of up to 50% were achieved for the FXO-f gel matrix containing 0.011% AuNPs. To elucidate the mechanism underlying this increased sensitivity, we also evaluated FXO-f gel matrixes containing AgNPs. AgNPs insertion into the FXO-f gel matrix did not enhance sensitivity, which suggested that the AgNPs plasmonic absorption band and the FXO-f gel matrix absorption band at 441nm overlapped, to increase absorption even after the gel matrix was irradiated. To visualize the dose distribution, we recorded optical tomography and acquired 3D reconstruction maps. In addition, we analyzed the dose enhancement factor (DEF) by using magnetic resonance images. AuNPs insertion into the FXO-f gel matrix resulted in a DEF gain of 1.37, associated with the photoelectric effect originating from the increased number of free radicals.

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“…Xylenol orange was one of these agents, which reduced the diffusion by chelating the ferric ions and produced a chemical species that has an intense absorption peak at 585 nm. Thus, the Fricke xylenol orange gel dosimeters change its color from yellow orange to deep purple upon irradiation [ 12 ], and, when combined with a three-dimensional imaging technique, demonstrates promising results in 3DD [ 13 , 14 , 15 , 16 ]. Recently, the addition of formaldehyde to the Fricke xylenol Orange (FXO-f) gel resulted in a higher melting point dosimeter and a similar dosimetric response as FXO [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Dosimetry by Optical-CT and Radiochromic Gel Dosimeter of a Multiple Isocenter Craniospinal Radiation Therapy Procedure

Silveira

Pavoni

Bruno

et al. 2022

Gels

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Craniospinal irradiation (CSI) is a complex radiation technique employed to treat patients with primitive neuroectodermal tumors such as medulloblastoma or germinative brain tumors with the risk of leptomeningeal spread. In adults, this technique poses a technically challenging planning process because of the complex shape and length of the target volume. Thus, it requires multiple fields and different isocenters to guarantee the primary-tumor dose delivery. Recently, some authors have proposed the use IMRT technique for this planning with the possibility of overlapping adjacent fields. The high-dose delivery complexity demands three-dimensional dosimetry (3DD) to verify this irradiation procedure and motivated this study. We used an optical CT and a radiochromic Fricke-xylenol-orange gel with the addition of formaldehyde (FXO-f) to evaluate the doses delivered at the field junction region of this treatment. We found 96.91% as the mean passing rate using the gamma analysis with 3%/2 mm criteria at the junction region. However, the concentration of fail points in a determined region called attention to this evaluation, indicating the advantages of employing a 3DD technique in complex dose-distribution verifications.

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A method for obtaining three-dimensional measurements of HDR brachytherapy dose distributions using Fricke gel dosimeters and optical computed tomography

Cited by 4 publications

References 27 publications

The new Scopus CiteScore formula and the Journal Impact Factor: a look at top ranking journals and middle ranking journals in the Scopus categories of General Physics and Astronomy, Materials Science, General Medicine and Social Sciences

The new Scopus CiteScore formula and the Journal Impact Factor: a look at top ranking journals and middle ranking journals in the Scopus categories of General Physics and Astronomy, Materials Science, General Medicine and Social Sciences

Assessment of dosimetric sensitivity enhancement of xylenol orange Fricke gel by AuNPs: optical and MR imaging investigation

Three-Dimensional Dosimetry by Optical-CT and Radiochromic Gel Dosimeter of a Multiple Isocenter Craniospinal Radiation Therapy Procedure

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