Purpose: To determine the surface dose of a water phantom using a semiconductor detector for diagnostic kilovoltage x-ray beams.
Methods: An AGMS-DM+ semiconductor detector was calibrated in terms of air kerma measured with an ionization chamber. Air kerma was measured for 20 x-ray beams with tube voltages of 50-140 kVp and a half-value layer (HVL) of 2.2-9.7 mm Al for given quality index (QI) values of 0.4, 0.5, and 0.6, and converted to the surface dose. Finally, the air kerma and HVL measured by the AGMS-DM+ detector were expressed as a ratio of the surface dose for 10 × 10 and 20 × 20 cm fields. The ratio of both was represented as a function of HVL for the given QI values and verified by comparing it with that calculated using the Monte Carlo method.
Results: The air kerma calibration factor, CF, for the AGMS-DM+ detector ranged from 0.986 to 1.016 (0.9% in k = 1). The CF values were almost independent of the x-ray fluence spectra for the given QI values. The ratio of the surface dose to the air kerma determined by the PTW 30,013 chamber and the AGMS-DM+ detector was less than 1.8% for the values calculated using the Monte Carlo method, and showed a good correlation with the HVL for the given QI values.
Conclusion: It is possible to determine the surface dose of a water phantom from the air kerma and HVL measured by a semiconductor detector for given QI values.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.ejmp.2021.04.009 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Design, Synthesis, Biocompatibility, molecular docking and molecular dynamics studies of novel Benzo[b]thiophene-2-carbaldehyde derivatives targeting human IgM Fc Domains.
Bioorg Chem
January 2025
Department of Chemistry, St Berchmans College (Autonomous), Changanassery, Kerala 686101, India; Centre for Theoretical and Computational Chemistry, St Berchmans College (Autonomous), Changanassery, Kerala 686101, India. Electronic address:
In this study, three novel derivatives of benzo[b]thiophene-2-carbaldehyde (BTAP1, BTAP2, and BTAP3) were successfully synthesized and comprehensively characterized using spectroscopic techniques including FTIR, UV-VIS, HNMR, and CNMR. Thermal analysis through TGA and DTA demonstrated remarkable thermal stability with a maximum threshold at 270 °C. Spectroscopic investigations revealed π → π* transitions in all compounds, attributed to the conjugated system comprising benzothiophene rings connected to bromophenyl/ aminophenyl/phenol rings via α, β-unsaturated ketone bridges.
View Article and Find Full Text PDFMultiplex basophil activation tests for allergy diagnosis: present and future applications.
Front Allergy
January 2025
Laboratory for Clinical Immunology and Molecular Genetics, University Clinic of Respiratory and Allergic Diseases Golnik, Golnik, Slovenia.
The basophil activation test (BAT) has become a major cellular test for evaluating the allergenic activity of specific IgEs. The impact of the BAT is due to the ability of blood basophil granulocytes to present IgE on the high-affinity FcRI receptor and to mirror the mast cell response that elicits an acute allergic reaction. The BAT proved to be able to identify allergic patients at risk of reacting to a low dose of the allergen and/or developing life-threatening reactions and thus can significantly improve the current management of allergic patients.
View Article and Find Full Text PDFImpact of ozone concentration on the treatment effectiveness of diabetic foot syndrome: a pilot single-centre study.
Postepy Dermatol Alergol
December 2024
Department of Internal Medicine, Angiology and Physical Medicine in Bytom, Faculty of Medical Sciences in Zabrze, Medical University of Silesia in Katowice, Poland.
Introduction: Diabetic foot syndrome (DFS) a severe complication of diabetes which can result in ulcers, infections, or tissue damage in the feet.
Aim: To compare the treatment effectiveness in patients with DFS using local O therapy depending on the O concentration.
Material And Methods: The study included 50 patients, 24 male and 26 female ones, in the age range between 39 and 84 years, with DFS.
Abiraterone acetate fixed-dosed combinations with ibuprofen-based therapeutic eutectic and deep eutectic solvents.
Int J Pharm
January 2025
University of Applied Sciences and Arts Northwest. Switzerland, School of Life Sciences, Institute of Pharma Technology, Hofackerstr. 30 CH-4132 Muttenz, Switzerland. Electronic address:
In recent years, deep eutectic solvents (DESs) with their outstanding solubilization properties have emerged as strong candidates for oral enabling formulations of poorly soluble drugs. This study explores the use of drug-based therapeutic DESs (THEDESs) to solubilize a poorly soluble compound with the aim of providing a fixed-dose combination of two complementary therapeutic agents. Specifically, potential anticancer effects of ibuprofen (IBU) are harnessed in a novel type of THEDES to dissolve higher amounts of abiraterone acetate (AbAc), an antitumor agent.
View Article and Find Full Text PDFFeeding broilers with the addition of an Ilex paraguariensis coproduct affects zootechnical performance and meat quality responses.
Trop Anim Health Prod
January 2025
Department of Agroindustrial Science and Technology, Federal University of Pelotas, Rio Grande Do Sul, Brazil.
During the harvest of Ilex paraguariensis, approximately 2-5 tons per hectare of thick stems are left on the soil surface. The outer portion of these stems, referred to as the coproduct, constitutes 30% of the total residue mass. Although this coproduct has been partially characterized in terms of its phytochemical profile, its technological applications remain unexplored.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!