scholarly journals Studies of Fricke-PVA-GTA xylenol orange hydrogels for 3D measurements in radiotherapy dosimetry

2019 ◽  
Author(s):  
Salvatore Gallo ◽  
Daniela Bettega ◽  
Grazia Gambarini ◽  
Cristina Lenardi ◽  
Ivan Veronese
Keyword(s):  
Xylenol Orange ◽  
3D Measurements ◽  
Radiotherapy Dosimetry

New dosimetric approach for multidimensional dose evaluation in gamma knife radiosurgery

2000 ◽  
Vol 93 (supplement_3) ◽  
pp. 239-242 ◽  
Author(s):  
R. Foroni ◽  
G. Gambraini ◽  
U. Danesi ◽  
M. Mauri ◽  
E. Pompilio ◽  
...  
Keyword(s):  
Gamma Knife ◽  
Metal Ion ◽  
Light Transmission ◽  
Xylenol Orange ◽  
Ferrous Sulphate ◽  
Gamma Knife Radiosurgery ◽  
Absorbed Dose ◽  
Content Type ◽  
3D Representation ◽  
Fine Print

✓ During the past two decades, the progress in computerized treatment planning systems has led to more accurate imaging and therapy by using the gamma knife, especially with the smallest collimators (4 mm). However, the ionization chambers that have been used to calibrate the gamma knife are not useful with the smallest collimators because the chambers are too big compared with the irradiated volume. Therefore, it is important to develop more suitable dosimeters. This study proposes a new dosimeter method. The FriXyGel method proposed here is based on a phantom dosimeter, an acquisition chain, and dedicated software. This dosimeter uses an agarose gel into which a ferrous sulphate solution (Fricke solution) and a metal ion indicator (xylenol orange) are incorporated. The absorbed dose is detected through measurements of visible light transmission, imaged by means of a charge-coupled device camera provided with a suitable optical filter. Gel layers are imaged before and after irradiation, and the differences in light absorption are related to the absorbed dose. By choosing convenient thickness of gel layers and by building up a phantom with different gel slices, it is possible to obtain a three-dimensional (3D) representation of the absorbed dose. The final 3D representation is reached after several mathematical processes have been applied to the images. The first step identifies and reduces all factors that could alter the original data, such as nonuniformity in illumination. Then, after calibration procedures, it is possible to obtain absorbed dose values and to discover their 3D representation. This goal has been reached by developing appropriate software that performs all the calculations necessary for spatial representation routines and prompt comparison with theoretical calculations.

Xylenol-orange-assay-of-hydrogen-peroxide for Measuring Uricase Activity and Recognizing High-activity Uricase Mutant

2013 ◽  
Vol 19 (3) ◽  
pp. 523-527 ◽  
Author(s):  
Miaomiao LIU ◽  
Juan FENG ◽  
Hongbo LIU ◽  
Xiaolan YANG ◽  
Liping FENG ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
High Activity ◽  
Xylenol Orange ◽  
Uricase Activity

Assessment of Structural Stability of Pure and Xylenol Orange Dye Doped Potassium Dihydroegn Phosphate Probed by Shock Waves

2021 ◽  
Author(s):  
A. Sivakumar ◽  
A. Saranraj ◽  
S. Sahaya Jude Dhas ◽  
P. Sivaprakash ◽  
S. Arumugam ◽  
...  
Keyword(s):  
Shock Waves ◽  
Structural Stability ◽  
Xylenol Orange

Photonic crystal fibre as a potential medium for radiotherapy dosimetry

2021 ◽  
pp. 109771
Author(s):  
Mahfuza Begum ◽  
A.K.M. Mizanur Rahman ◽  
H.A. Abdul-Rashid ◽  
Z. Yusoff ◽  
Siti Nurasiah Mat Nawi ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Photonic Crystal Fibre ◽  
Radiotherapy Dosimetry

scholarly journals EFOMP survey results on national radiotherapy dosimetry audits

2021 ◽  
Vol 84 ◽  
pp. 10-14
Author(s):  
Oscar Casares-Magaz ◽  
Loredana G. Marcu ◽  
Yolanda Prezado ◽  
Efi Koutsouveli ◽  
Marco Brambilla
Keyword(s):  
Survey Results ◽  
Radiotherapy Dosimetry

PO-1480: Position in breast cancer radiotherapy: dosimetry and toxicity

2020 ◽  
Vol 152 ◽  
pp. S795-S796
Author(s):  
D. Hernandez ◽  
M.S. Talaya ◽  
C. Anson ◽  
P. Castro ◽  
M. Roch ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Cancer Radiotherapy ◽  
Breast Cancer Radiotherapy ◽  
Radiotherapy Dosimetry

Use of a liquid ionization chamber for stereotactic radiotherapy dosimetry

2013 ◽  
Vol 58 (8) ◽  
pp. 2445-2459 ◽  
Author(s):  
A Wagner ◽  
F Crop ◽  
T Lacornerie ◽  
F Vandevelde ◽  
N Reynaert
Keyword(s):  
Stereotactic Radiotherapy ◽  
Ionization Chamber ◽  
Liquid Ionization Chamber ◽  
Radiotherapy Dosimetry ◽  
Liquid Ionization

Intensity modulated radiotherapy dosimetry with ion chambers, TLD, MOSFET and EDR2 film

2007 ◽  
Vol 30 (1) ◽  
pp. 25-32 ◽  
Author(s):  
R. A. Kinhikar ◽  
R. Upreti ◽  
S. Sharma ◽  
C. M. Tambe ◽  
D. D. Deshpande
Keyword(s):  
Intensity Modulated Radiotherapy ◽  
Intensity Modulated ◽  
Edr2 Film ◽  
Ion Chambers ◽  
Radiotherapy Dosimetry

Lipid Hydroperoxide Determination in Dark Chicken Meat through a Ferrous Oxidation−Xylenol Orange Method

2000 ◽  
Vol 48 (9) ◽  
pp. 4136-4143 ◽  
Author(s):  
Anna Grau ◽  
Rafael Codony ◽  
Magda Rafecas ◽  
Ana C. Barroeta ◽  
Francesc Guardiola
Keyword(s):  
Xylenol Orange ◽  
Lipid Hydroperoxide ◽  
Chicken Meat ◽  
Ferrous Oxidation
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