New Fricke Xylenol Liquid detector doped with methylene blue (FXL-mblue) irradiated with red LED light

Oliveira, Lucas Nonato de; Nascimento, Eriberto Oliveira do; Caldas, Linda V.E.

doi:10.1016/j.jlumin.2020.117730

Cited by 3 publications

(5 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A program was developed in Matlab ® 2020a, to turn the lamp on and off; more details of the irradiation system can be seen in the literature [4]. The irradiations were carried out in the laboratory in darkness with the only window closed and with a curtain, to prevent the entry of light from outside.…”

Section: Irradiations and Evaluation Of Chs Detector Samplesmentioning

confidence: 99%

“…Therefore, some characterization tests of the CHS detector samples can be performed regarding the determination of the CHS spectra for six concentrations and ten doses; calibration curves from six concentrations of CHS samples; the evaluation of the linearity considering the squared Pearson correlation coefficient (R 2 ); the sensitivity; and results for statistical methods. The definitions of linearity, sensitivity and Wavelength Method (WM) for spectra obtained with the UV-Vis technique can be found in the literature [4].…”

Section: Parameters For Chs Detector Samplesmentioning

confidence: 99%

“…Photodynamic therapy (PDT) has been investigated recently [1][2][3][4] in studies about new drugs [5], using nanoparticles [6], control microbial biofilms [7], and applications in advanced nanomaterials [8]. PDT consists of the annihilation of several cancers, through an incident visible light (VL), which sensitizes a drug called photosensitizer (PS), causing damage to living tissue (cancer cells), occurring the production of oxygen in this process [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new natural detector for irradiations with blue LED light source in photodynamic therapy measurements via UV–Vis spectroscopy

Oliveira

Nascimento

Caldas

2021

Photochem Photobiol Sci

Self Cite

View full text Add to dashboard Cite

Photodynamic therapy has been recently studied, bringing innovations regarding the reduction of exposure time to light by the patient. This work aimed to investigate the feasibility of using Coutarea hexandra (Jacq.) K. Schum (CHS) as a detector in photodynamic therapy measurements. For this, an irradiator containing a blue LED bulb lamp was utilized. The CHS samples were irradiated with ten doses from 0.60 up to 6.0 kJ/cm 2 , and six concentrations were prepared (1, 2, 3, 4, 5, and 6 mg/ml) for the CHS detector samples. After irradiation, the detector samples were evaluated using UV-Vis spectrophotometry. The results showed the behavior of the CHS detector with doses and concentrations, its sensitivity, and its linearity was also evaluated both by Wavelength Method (WM) and the Kernel Principal Component Regression (KPCR) Statistical Method. The values obtained indicate that this method can be applied to the CHS sample detector. In conclusion, the CHS is a promising detector in the field of photodynamic therapy.

show abstract

Section: Irradiations and Evaluation Of Chs Detector Samplesmentioning

confidence: 99%

Section: Parameters For Chs Detector Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A new natural detector for irradiations with blue LED light source in photodynamic therapy measurements via UV–Vis spectroscopy

Oliveira

Nascimento

Caldas

2021

Photochem Photobiol Sci

Self Cite

View full text Add to dashboard Cite

show abstract

“…The Fricke dosimeter has versatility in dose determining, which different techniques can be obtain. However, two most commonly used techniques are: optical and electromagnetic interaction methods such as the UV-Visible spectrophotometry (UV-Vis) [8,9] and nuclear magnetic resonance spectroscopy (NMR) [10][11][12]. The UV-Visible absorption spectrophotometry is applied to quantify the ferric ion Fe 3+ at the wavelengths of 225 and 304 nm in Fricke solutions.…”

Section: Introductionmentioning

confidence: 99%

Dose response assessment of conventional Fricke: a relationship between UV-Visible and nuclear magnetic resonance techniques

et al. 2023

View full text Add to dashboard Cite

Conventional Fricke is an aqueous ferrous sulfate solution that has been widely studied in the field of chemical dosimetry. The feasibility of its use has become attractive for high dose measurements that are of clinical interest in the field of radiotherapy and for industrial purposes, in the irradiation of blood bags and the sterilization of surgical material. The derivation of the absorbed dose of Fricke depends on the radiation-induced oxidation of iron (II) ions (Fe2+) present in the aqueous solution to iron (III) ions (Fe3+), which occurs after exposure to ionising radiation. In this paper, it is proposed to evaluate the dose response of the Fricke dosimeter using two different analytical techniques, ultraviolet-visible spectrophotometry (UV-Vis) and nuclear magnetic resonance spectroscopy (NMR). Twelve groups of samples were analysed in triplicate, irradiated with doses between 0 and 800 Gy, using a cobalt-60 source (60Co). The dose rate of Fricke dosimeters was evaluated against the practical values obtained. The different methods allowed an analytical correlation of the species of oxidised iron (Fe3+) using a linearity curve as a function of the applied radiation dose.

show abstract

“…In recent years, gel dosimeters, which are chemical dosimeters, have been attracting significant attention as promising tools for measuring 3D dose distributions [ 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Various forms of chemical dosimeters are used, such as the Fricke gel dosimeter [ 22 , 23 , 24 ], which uses the oxidation reaction of iron ions, and the polymer gel dosimeter [ 25 , 26 , 27 ], which uses radiation-induced polymerization in a monomer solution. The 3D spatial information of these methods is preserved by implanting radiosensitive chemicals in a spatially stable gel matrix.…”

Section: Introductionmentioning

confidence: 99%

Whole Three-Dimensional Dosimetry of Carbon Ion Beams with an MRI-Based Nanocomposite Fricke Gel Dosimeter Using Rapid T1 Mapping Method

Mizukami

Watanabe

Mizoguchi

et al. 2021

Gels

View full text Add to dashboard Cite

MRI-based gel dosimeters are attractive systems for the evaluation of complex dose distributions in radiotherapy. In particular, the nanocomposite Fricke gel dosimeter is one among a few dosimeters capable of accurately evaluating the dose distribution of heavy ion beams. In contrast, reduction of the scanning time is a challenging issue for the acquisition of three-dimensional volume data. In this study, we investigated a three-dimensional dose distribution measurement method for heavy ion beams using variable flip angle (VFA), which is expected to significantly reduce the MRI scanning time. Our findings clarified that the whole three-dimensional dose distribution could be evaluated within the conventional imaging time (20 min) and quality of one cross-section.

show abstract

New Fricke Xylenol Liquid detector doped with methylene blue (FXL-mblue) irradiated with red LED light

Cited by 3 publications

References 20 publications

A new natural detector for irradiations with blue LED light source in photodynamic therapy measurements via UV–Vis spectroscopy

A new natural detector for irradiations with blue LED light source in photodynamic therapy measurements via UV–Vis spectroscopy

Dose response assessment of conventional Fricke: a relationship between UV-Visible and nuclear magnetic resonance techniques

Whole Three-Dimensional Dosimetry of Carbon Ion Beams with an MRI-Based Nanocomposite Fricke Gel Dosimeter Using Rapid T1 Mapping Method

Contact Info

Product

Resources

About