scholarly journals RADIATION RESISTANT COMPOSITE FOR BIOLOGICAL PROTECTION OF THE PERSONNEL

2020 ◽  
Vol 1 (23) ◽  
Author(s):  
Andrei Barabash ◽  
Dimitry Barabash ◽  
Sergey Pinaev
Keyword(s):  
Radiation Dose ◽  
Synergetic Effect ◽  
Polymer Concrete ◽  
Protective Properties ◽  
Radiation Resistant ◽  
Absorbed Radiation Dose ◽  
Biological Protection

Results of scientific and practical justification of use as a part of designs of biological protection of polymer concrete on the basis of non - isocyanates polyurethane are presented. Influence of a ratio polymer is established: radiation - resistant filler on strength and protective properties of a polymer concrete. Regression dependences of change of the main properties of the specified polymer concrete on the power of the absorbed radiation dose are given. The synergetic effect in weakening of radiation when sharing a hydrogenous polymeric basis and radiation resistant powders is shown.

scholarly journals RADIATION RESISTANT BINDING MATERIALS BASED ON SILICATE ALUMOBARIUM CEMENTS

2020 ◽  
Vol 1 (154) ◽  
pp. 67-70
Author(s):  
N. Tsapko
Keyword(s):  
Physical And Mechanical Properties ◽  
High Strength ◽  
Technological Parameters ◽  
Protective Properties ◽  
Initial Strength ◽  
Radiation Resistant ◽  
Biological Protection ◽  
Effects Of Radiation ◽  
Main Components ◽  
High Degree

The article analyzes the possibility of developing custom binders with a set of set properties. Particular attention is paid to the development of radiation-resistant barium-containing cements based on aluminates and barium silicates. In order to normalize the radiation situation in Ukraine, it is urgent to develop structural materials with specified high protective properties against the effects of radiation, a high degree of biological protection in combination with high strength and fire resistance. The main components of the technological parameters of synthesis of the presented cements are determined. Test results of physical and mechanical properties of refractory radiation resistant cements are presented and general recommendations on the scope of the developed binder materials are given. It is determined that the resulting refractory cement can be used as a bond in the manufacture of special concretes and materials that have high protective properties while exposed to high temperatures and radiation. Thermal stability of concrete based on silicate alumobarium cement with different fillers was determined (cooling of the samples was carried out in air). As a result of the tests, it was found that all concrete specimens withstood more than 20 cycles (1000 ° C - air), while maintaining more than 80 % of the initial strength. These results confirm the known pattern: the higher the material density, the greater the material's ability to absorb radiation. Thus, the obtained data allow us to conclude that concrete based on silicate alumobarium cement have high absorption rates of brake radiation, which is more than 1.5 times higher than currently used concrete based on Portland cement. Therefore, it can be concluded that the concretes obtained are radiation resistant, with a high degree of attenuation of gamma rays and can be recommended as protective materials. Keywords: cement, composition, synthesis parameters, radiation resistance, property, strength

The effect of dynamic wedge angle in breast cancer's absorbed radiation dose

2020 ◽  
Author(s):  
Nurul Fitriyah ◽  
Rahmatul Izza Nur Amalia ◽  
Bambang Haris Suhartono ◽  
Suryani Dyah Astuti
Keyword(s):  
Radiation Dose ◽  
Wedge Angle ◽  
Dynamic Wedge ◽  
Absorbed Radiation Dose

Selective fallopian tube catheterisation in female infertility: clinical results and absorbed radiation dose

1996 ◽  
Vol 6 (4) ◽  
Author(s):  
K. Nakamura ◽  
T. Ishiguchi ◽  
H. Maekoshi ◽  
Y. Ando ◽  
M. Tsuzaka ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Fallopian Tube ◽  
Clinical Results ◽  
Female Infertility ◽  
Absorbed Radiation Dose

scholarly journals Percutaneous Coronary Intervention in Pregnancy: Modeling of the Fetal Absorbed Dose

2019 ◽  
Vol 2019 ◽  
pp. 1-5 ◽  
Author(s):  
Kfier Kuba ◽  
Diana Wolfe ◽  
Alan H. Schoenfeld ◽  
Anna E. Bortnick
Keyword(s):  
Myocardial Infarction ◽  
Percutaneous Coronary Intervention ◽  
Radiation Dose ◽  
Absorbed Dose ◽  
Coronary Intervention ◽  
Cardiac Procedures ◽  
Percutaneous Coronary ◽  
St Elevation ◽  
Absorbed Radiation Dose ◽  
In Pregnancy

There is a gap in the literature regarding fetal radiation exposure from interventional cardiac procedures. With an increasingly large and complex cohort of pregnant cardiac patients, it is necessary to evaluate the safety of invasive cardiac procedures and interventions in this population. Here we present a case of a patient with multiple medical comorbidities and non-ST elevation myocardial infarction (NSTEMI) at 15 weeks’ gestation, managed with percutaneous coronary intervention (PCI). We were able to minimize the maternal and estimated fetal absorbed radiation dose to <1 milliGray (mGy), significantly less than the threshold dose for fetal adverse effects at this gestational age.

Immunoscintigraphic localization of inflammatory lesions: Pharmacokinetics and estimated absorbed radiation dose in man

1988 ◽  
Vol 13 (11) ◽  
pp. 594-597 ◽  
Author(s):  
Peter H. Hasler ◽  
Klaus Seybold ◽  
Roger Y. Andres ◽  
Johannes T. Locher ◽  
P. August Schubiger
Keyword(s):  
Radiation Dose ◽  
Inflammatory Lesions ◽  
Absorbed Radiation Dose

A computer program to determine cumulated activity and absorbed radiation dose

1977 ◽  
Vol 4 (2) ◽  
pp. 152
Author(s):  
P.F. Butler ◽  
L.T. Fitzgerald ◽  
K.N. Vanek ◽  
V.A. Brookeman
Keyword(s):  
Radiation Dose ◽  
Computer Program ◽  
Absorbed Radiation Dose

High-dose therapy with iodine-131-labeled monoclonal antibody CC49 in patients with gastrointestinal cancers: a phase I trial.

1997 ◽  
Vol 15 (4) ◽  
pp. 1518-1528 ◽  
Author(s):  
M Tempero ◽  
P Leichner ◽  
G Dalrymple ◽  
K Harrison ◽  
S Augustine ◽  
...  
Keyword(s):  
Stem Cells ◽  
Monoclonal Antibody ◽  
Radiation Dose ◽  
Phase I ◽  
Hematopoietic Stem Cells ◽  
Phase I Trial ◽  
Gastrointestinal Cancers ◽  
Hematopoietic Stem ◽  
Iodine 131 ◽  
Absorbed Radiation Dose

PURPOSE A phase I trial that evaluated for extrahematopoietic toxicity was conducted with iodine-131 (131I) labeled monoclonal antibody (MAb) CC49. Correlative studies included pharmacokinetic and biodistribution analyses, estimates of absorbed radiation dose, and measurement of human antimonoclonal antibodies (HAMA). PATIENTS AND METHODS After collection and cryopreservation of hematopoietic stem cells, 15 patients with gastrointestinal cancers were administered a tracer dose of 131I-MAb CC49. Within 5 to 6 days, 14 patients (two to three per activity level) underwent a single treatment with 131I-MAb CC49 (50, 100, 150, 200, 250, and 300 mCi/m2). Biodistribution was determined using planar and single photon emission computer tomographic (SPECT) imaging. Pharmacokinetic studies were performed by measuring radioactivity in serial blood samples. In some patients, biopsies of metastases and related normal tissues were obtained for radioactivity measurements. Radiation dosimetry estimates were calculated using available biodistribution, pharmacokinetic, and tissue biopsy data. Toxicity was evaluated using the National Cancer Institute (NCI) Common Toxicity Criteria. RESULTS No dose-limiting extrahematopoietic toxicity was identified. Twelve patients experienced grade IV myelosuppression and met criteria for infusion of hematopoietic stem cells. Radioimmunolocalization was excellent. The T1/2 for 131I-MAb CC49 after diagnostic and therapeutic administration was 39.7 +/- 10.4 and 46.1 +/- 10.6 hours, respectively. The percent injected dose per killigram of tumor ranged from 0.2 to 2.1. Absorbed radiation dose in metastatic tumor sites ranged from 630 to 3300 cGy. CONCLUSION Although extrahematopoietic dose-limiting toxicity was neither observed or predicted, suboptimal absorbed dose estimates suggested that further escalation of 131I-MAb CC49 would not be useful. Future studies should focus on the use of radionuclides with high energy beta emissions, such as yttrium 90, and on strategies to optimize access of antibody to target antigens.

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