نتایج جستجو برای: دزیمتری in vivo
تعداد نتایج: 16982189 فیلتر نتایج به سال:
دزیمتری فعال فردی گاما و نوترون در سالهای اخیر مورد توجه بوده است و در این میان دیودهای سیلیسیمی گزینهی مناسبی برای این منظور هستند. دیودهای سیلیسیمی، حساس به گاما بوده و برای ایجاد حساسیت نوترونی در آنها از یک لایهی مبدل استفاده میشود. در این پژوهش، ابعاد بهینهی مبدل و آشکارساز برای ایجاد رفتار دزیمتری مناسب و جداسازی معادل دز گاما و نوترون تعیین شده است. با توجه به طراحی دزیمتر و اعمال...
Objective(s): The field of nanotechnology is rapidly expanding .The development quantum dots quantum dot (QDs), show great promise for treatment and diagnosis of cancer and targeted drug delivery little data on the toxicity of QDs, especially for in vivo applications, are available. As a result, concerns exist over their toxicity for in vivo applications. Then, cytotoxic effects of cadmium sel...
The use of quantum dots (QDots) as bright and photostable probes for long-term fluorescence imaging is gaining more interest. Thus far, (pre)clinical use of QDots remains limited, which is primarily caused by the potential toxicity of QDots. Most QDots consist of Cd2+ ions, which are known to cause high levels of toxicity. Therefore, the cytotoxic effects of CdSe quantum dots on embryonic devel...
Objective(s): Resveratrol (RSV) is a naturally occurring plant polyphenol with cardioprotective, neuroprotective, immunoregulatory, and anticancer properties and is biologically effective against various diseases. This study aimed to investigate the chemopreventive effect of different doses of RSV against hepatocellular carcinoma (HCC) induced by diethylnitrosamine (D...
Introduction: Due to the prevalence of skin problems in patients after radiotherapy, skin dose measuring is importance. Content: Skin in vivo dosimetry means measuring the patient's (or phantom) skin dose during radiotherapy. According to the ICRP 59, the dose at the depth of 0.07 mm is known as a skin dose. The most radiosensitive epidermis cells are located...
آزمایشگاههای دزیمتری استاندارد ثانویه به عنوان مراجع ملی
Introduction: The most modern radiotherapy devices are equipped with an Electronic Portal Imaging Device (EPID) system which is located on opposite side of the machine’s head. EPID system is often used to setting up the position verification during or between radiotherapy sessions. Material and Methods: Various types of dosimeters have been used to setting up ...
Background: The SALL4/Sall4 is constitutively expressed in human and mice. SALL4 mRNA could be used as a marker for the diagnosis of different types of cancers. On the other hand, chrysin has diverse biological properties. Objectives: In the present study, the effect of the chrysin was investigated on the CT26 colon cancer in vitro and in vivo. Furthermore, the expression levels of the stem cel...
Insulin-loaded biodegradable chitosan nanoparticle was prepared by the polyelec-trolyte complex formation method. The prepared nanoparticles were in the size of 110 nm and had high entrapment (91.0%) capacity. The transdermal nanoinsulin was characterized by in vivo hypoglycemic effects. Plasma glucose was decreased to the range of 80.34 to 96.74 mg/dl, and insulin levels were in...
شناخت دقیق توزیع دز در اطراف چشمههای براکیتراپی به منظور ایجاد طرحهای درمانی مناسب برای درمان سرطان ضروری است. در این پژوهش، پارامترهای دزیمتری چشمهی بالینی Cf252 براساس دستورکار 43-TG و بهرهگیری از تالیهای مختلفِ (4F، 6F و 8*F) محاسبهی دز در کد MCNPX، مقدار دز در زاویهها و فاصلههای مختلف از مرکز چشمه محاسبه و با دادههای تجربی و شبیهسازی دیگران مقایسه شد. ب...
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