To measure the laser radiation power in the experimental and clinical medicine the authors developed a compact, easily inserted in any laser medical installation power measurer. The measurer consists of the photodetector--silicon photoresistor, temperature-compensating photoresistor, operational amplifier and feeding block. The merit of the measurer is its constructive simplicity, reliability in work.
Download full-text PDF |
Source |
---|
EJNMMI Phys
November 2024
Department of Clinical Physiology, Nuclear Medicine, Turku PET Centre, and Medical Physics, Turku University Hospital and Wellbeing Services County of Southwest Finland, Turku, Finland.
J Appl Clin Med Phys
November 2024
Department of Radiation Oncology, Shanghai Concord Medical Cancer center, Shanghai, China.
Appl Radiat Isot
October 2024
Collaborative Laboratories for Advanced Decommissioning Science, Japan Atomic Energy Agency, 790-1 Motooka Aza Ohtsuka, Tomioka-machi, Futaba-gun, Fukushima, Japan. Electronic address:
At the Fukushima Daiichi Nuclear Power Station, radiation sources released in the accident were deposited on various equipment and building structures. During decommissioning, it is crucial to understand the distribution of radiation sources and ambient dose equivalent rates to reduce worker exposure and implement detailed work planning. In this study, the author introduces a method for visualizing radiation sources, estimates their radioactivity using a Compton camera, and derives the dose rate around the radiation sources.
View Article and Find Full Text PDFEnviron Sci Pollut Res Int
June 2024
Department of Applied Sciences, Faculty of Engineering and Science, Curtin University Malaysia, CDT 250, 98009, Miri, Sarawak, Malaysia.
Labuan, Miri, Kundasang and Raub regions of Malaysia have very different geological formations and settings that could result in different levels of natural radioactivity. Hence, this study determines the influence of different geological formations on radioactivity in these locations using field measurements, petrology and geochemistry. A total of 141 gamma dose rates and 227 beta flux measurements were collected using Polimaster survey meters (PM1405) in these four regions.
View Article and Find Full Text PDFHeliyon
May 2024
Health Physics Division, Atomic Energy Centre, Dhaka, 1000, Bangladesh Atomic Energy Commission, Bangladesh.
In this study, activity concentrations of natural radionuclides in 28 raw milk samples collected from different dairy farms in Dhaka city of Bangladesh were measured using a high-purity germanium (HPGe) detector for the first time. The activity concentration of Ra, Th, and K in the investigated fresh milk samples ranged from BDL (Below detection level) to 26 ± 1.6 Bq/kg, BDL to 11.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!