Computation and analysis of scattered radiation background on flash radiography

2001 ◽  
Author(s):  
Zhigao Zou ◽  
Wenyuan Wang
Keyword(s):  
Scattered Radiation ◽  
Radiation Background

Features of sanitary and hygienic characteristics of silvinite complexes

2020 ◽  
pp. 57-62
Author(s):  
E. Ryazanova ◽  
V. Barannikov ◽  
V. Khokhryakova ◽  
L. Kirichenko ◽  
S. Selivanova
Keyword(s):  
Video Camera ◽  
Treatment Center ◽  
Internal Environment ◽  
Radiation Background ◽  
Medical Environment ◽  
Light Levels ◽  
Salt Complex ◽  
Radio Equipment ◽  
Environment Noise ◽  
Medical University

Currently, medical technologies based on natural factors are widely used in practical health care, including the effect of the medicinal properties of the mineral silvinite (natural potassium salts of the Verkhnekamsk Deposit) on the patient’s body. However, there is no regulatory framework for sanitary control of such devices. The aim of the study was to develop methodological approaches to the hygienic assessment of silvinite complexes. The analysis of the current regulations used in carrying out hygienic supervision and preventive measures in the salt structures that are part of the silvinite complexes is carried out. Based on long-term hygienic studies of silvinite structures by the salt treatment Center of Perm medical University. academician E. A. Wagner together with LLC NPK «Medical climate» (Tchaikovsky) developed and implemented sanitary and hygienic requirements for the created salt complexes. It is a complex of structural divisions, including the place of stay and treatment of patients, as well as the salt device. All units must meet the requirements of current sanitary rules and regulations. It is necessary to conduct a thorough survey of the location of the future salt complex. Optimal conditions of the internal environment in silvinite structures are determined by a special air preparation system consisting of air conditioning and cleaning of the external air using a filter-saturator. The special hygienic requirements of the sylvinite furniture in the room, the decoration of walls, ceilings and floors. The room must be equipped with radio equipment and a video camera for monitoring patients. Full expanded hygienic control of the parameters of the medical environment of silvinite premises should be carried out at least once a year according to the following indicators: microclimate parameters, content of multicomponent fine salt aerosol, aeroionic composition of the air environment, radiation background, microbial contamination of the internal environment, noise and light levels. Thus, increasing the use of salt therapy requires further research to improve the sanitary and hygienic control of silvinite complexes.

Active control of the scattered radiation with a reflecting surface

2019 ◽  
Vol 67 (3) ◽  
pp. 190-196
Author(s):  
Ning Han
Keyword(s):  
Control System ◽  
Active Control ◽  
Scattered Radiation ◽  
Sound Pressure ◽  
Sound Field ◽  
Control Area ◽  
Mirror Image ◽  
Three Dimension ◽  
Control Effect ◽  
Reflecting Surface

Based on a prediction method of the scattered sound pressure, an active control system was proposed in previous work for the three-dimension scattered radiation, where all the relevant simulations and experiments were implemented in three-dimensional free sound field. However, for practical applications, such as the anti-eavesdropping system or the stealth system for submarines, the sound field conditions are usually complex, and the most common case is the one with reflecting surface. It is questionable whether the previous control system is still effective in non-free sound field, or what improvements should be operated to ensure the control effect. In this article, based on the mirror image principle, two methods of calculating the control source strengths are proposed for the scattered radiation control, and numerical simulations with one-channel and multi-channel system are implemented to detect the corresponding control effect. It is seen that the local active control for the scattered radiation is still effective, and the reduction of the sound pressure level as well as the control area is extended with the increasement of the error sensors and control sources.

scholarly journals Effects of resveratrol against scattered radiation-induced testicular damage in rats

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Tarik Emre Sener ◽  
Beste Melek Atasoy ◽  
Ozge Cevik ◽  
Ozlem Tugce Cilingir Kaya ◽  
Sule Cetinel ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Radiation Exposure ◽  
Scattered Radiation ◽  
Caspase 3 ◽  
Sirtuin 1 ◽  
Protective Agent ◽  
Testicular Damage ◽  
Testosterone Levels ◽  
Protein Expressions ◽  
Ionizing Radiation Exposure

AbstractObjectivesTo investigate the possible protective effects of resveratrol against oxidative testicular damage due to scattered radiation during pelvic ionizing radiation exposure in rats.MethodsRats were divided into 5 groups; control, radiation, and radiation + resveratrol therapy in early and late periods. Under anesthesia, 20 Gy ionizing radiation was applied to prostatic region. Resveratrol was administered (10 mg/kg/day) orally before ionizing radiation exposure. Animals were decapitated at the end of 1st and 10th weeks. Biochemical markers of oxidative stress; caspase-3 and sirtuin-1 protein expressions; testosterone levels were evaluated, histological examinations were performed.ResultsSignificant increases in malondialdehyde, 8-hydroxy-deoxyguanosine levels, myeloperoxidase, and caspase-3 activities were observed after ionizing radiation exposure, also superoxide dismutase and glutathione activities were significantly decreased. Radiotherapy increased caspase-3 and decreased sirtuin-1 protein expressions. Resveratrol treatment significantly reversed these parameters and also reversed the decrease in testosterone levels back to control levels in late period.ConclusionResveratrol showed antioxidant and sirtuin-activating properties against oxidative damage caused by scattered radiation to testis and provided hormonal protection. These results suggest that resveratrol may be an alternative protective agent on testicular tissues against the effects of scattered pelvic radiation.

Scattered Radiation and Characteristic Film Curve

Radiology ◽  
1963 ◽  
Vol 80 (4) ◽  
pp. 663-667 ◽  
Author(s):  
K. H. Reiss
Keyword(s):  
Scattered Radiation

Performances of a protector against scattered radiation during intraoperative use of a C-arm fluoroscope

2016 ◽  
Vol 36 (3) ◽  
pp. 629-640 ◽  
Author(s):  
Ki Hyuk Sung ◽  
Young-Jun Jung ◽  
Soon-Sun Kwon ◽  
Gye Wang Lee ◽  
Chin Youb Chung ◽  
...  
Keyword(s):  
Scattered Radiation

Linear model for the scattered radiation distribution in digital chest radiographs

1996 ◽  
Author(s):  
Christiaan M. Fivez ◽  
Patrick Wambacq ◽  
Paul Suetens ◽  
Emile P. Schoeters
Keyword(s):  
Linear Model ◽  
Scattered Radiation ◽  
Chest Radiographs ◽  
Radiation Distribution ◽  
Digital Chest

The hazard of scattered radiation in a trauma intensive care unit

2002 ◽  
Vol 30 (3) ◽  
pp. 574-576 ◽  
Author(s):  
Gamal Mostafa ◽  
Ronald F. Sing ◽  
Richard McKeown ◽  
Toan T. Huynh ◽  
B. Todd Heniford
Keyword(s):  
Intensive Care Unit ◽  
Intensive Care ◽  
Scattered Radiation
Sign in / Sign up

Export Citation Format

Share Document