نتایج جستجو برای: dose rate constant

تعداد نتایج: 1402387  

Journal: :International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2017

Background: Hot lab is a specially designed room in a nuclear medicine hospital where the radiopharmaceuticals are delivered, stored and prepared for dispensing. 99Mo/99mTc-generator is the major source in the hot lab used for various medical imaging. It is important to maintain a standard for hot lab procedures to optimize the patient care and minimize radiation exposure to all nuclear medicin...

2006
Stephen W. Jones

2006;571;502-; originally published online Feb 2, 2006; J. Physiol. Stephen W. Jones Are rate constants constant? This information is current as of March 21, 2006 publication unless article is open access. This version of the article may not be posted on a public website for 12 months after http://jp.physoc.org/cgi/content/full/571/3/502 This is the final published version of this article; it i...

Journal: :The Journal of chemical physics 2005
Aaron Olsen George Franks Simon Biggs Graeme J Jameson

The rate of flocculation of cationic polystyrene latex (PSL) particles by smaller, anionic PSL particles has been measured using a low-angle static light scattering technique. The rate of aggregate growth has been investigated as a function of particle size ratio and relative concentration of each particle species (for a constant dose of cationic particles). Contrary to many previous reports, t...

Journal: :physical chemistry and electrochemistry 0

on the basis of experimental data a kinetic model for the heterogeneous interaction between alkylperoxyradicals and organic compounds in langmuir- hinshelwood approach at room temperature has been offered.the effect of oxygen on the kinetics of process in the presence, [o2]o = 1 x 1011 – 1.6 x 1012 molecules.cm-2, and absence of oxygen has been analyzed. over time the chain degenerate branching...

2014
Wenliang Yu Haijiao Shang Congying Xie Ce Han Jinling Yi Yongqiang Zhou Xiance Jin

PURPOSE To investigate the feasibility of constant dose rate volumetric modulated arc therapy (CDR-VMAT) in the treatment of nasopharyngeal cancer (NPC) patients and to introduce rotational arc radiotherapy for linacs incapable of dose rate variation. MATERIALS AND METHODS Twelve NPC patients with various stages treated previously using variable dose rate (VDR) VMAT were enrolled in this stud...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد گرمسار - دانشکده برق و کامپیوتر 1392

کنترل هشدار غلط، یک امر حیاتی برای سیستم های آشکارسازی اتوماتیک می باشد. اغلب، شرایط محیط به گونه ای است که توان نویز زمینه (کلاتر) و یا حتی توزیع آن با زمان تغییر می کند. در چنین شرایطی، برای دستیابی به کارایی مفید در سیستم، ملزم به استفاده از آستانه وفقی هستیم و وفقی کردن آستانه می بایست به گونه ای باشد که سیستم خاصیت cfar (constant false alarm rate) داشته باشد. کارهای متنوعی روی آشکارسازهای ...

Journal: :international journal of environmental research 2015
r. mukherjee a. sinha y. lama v. kumar

treatment of ground water contaminated with halogenated pesticides is a challenging task. thispaper focuses on preparation, characterization and treatment of heptachlor by iron particles synthesized fromsteel industry waste (s-zvi). the bof sludge, which is dumped in landfills, is an iron rich source and wasused as the source material for s-zvi synthesis. the vital step was reducing agent sodiu...

Davood Beiki, Golboo Mousazadeh Rashti Hoda Tayebi Mohammad Eftekhari, Simin Dadashzadeh Soraya Shahhoseeini

Sodium Iodide-131 is administrated for treatment of hyperthyroidism and thyroid cancer. Iodine-131 has multiple routs of excretion (Urine, saliva, sweat, milk, feces, exhalation) from the body. Patients receiving Sodium Iodide-131 therapy exposes other persons and the environment to unwanted radiation and contamination. The major source of radiation dose from administration of Iodine-131 ...

Journal: :JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 1987

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