نتایج جستجو برای: lens dose

تعداد نتایج: 360067  

K Patel NK Nair T Gandhi

Cataract is clouding of the eye lens that reduces the amount of incoming light and results in deteriorating vision. Blindness is thought to reach 75 million by 2020. Of these, unoperated cataract may be expected to account for at least 35 million. Thus, the burden of cataract is increasing remorselessly. Embelica officinalis is reported to have a very good antioxidant property and thus we hypot...

Journal: :بینا 0
حمید نوروزی h norouzi shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم حسین محمدربیع h mohammad rabei shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم علی لشگری a lashgari shahid beheshti university of medical sciences, tehran, iranتهران- خیابان شهید مدنی- بیمارستان امام حسین- بخش چشم

purpose: to report a case of anterior segment eye deposits in a patient on long-term chlorpromazine therapy. case report: a 34 years old man had been on chlorpromazine therapy for 5 years with a total dose of 1,100 gram. since one year ago, he presented with gradual onset of decreased visual acuity in both eyes. slit-lamp examination revealed multiple fine yellow-brown deposits on the corneal e...

Journal: :Radiation protection dosimetry 2015
Y Kong L Struelens F Vanhavere C S Vargas W Schoonjans W H Zhuo

More and more anaesthetists are getting involved in interventional radiology procedures and so it is important to know the radiation dose and to optimise protection for anaesthetists. In this study, based on Monte Carlo simulations and field measurements, both the whole-body doses and eye lens dose of anaesthetists were studied. The results showed that the radiation exposure to anaesthetists no...

Journal: :Investigative ophthalmology 1971
L von Sallmann P Grimes

The epithelium of the avascular, noninnervated lens was used to study the influence of isoproterenol on cell division. Contrary to the well-known and specific stimulation of deoxyribonucleic acid (DNA) synthesis and cell division in the salivary glands of rats and mice by this catecholamine, the rat lens epithelium responded to a single dose of either locally or systemically administered drug w...

2014
Nobuyuki Hamada Yuki Fujimichi Toshiyasu Iwasaki Noriko Fujii Masato Furuhashi Eri Kubo Tohru Minamino Takaharu Nomura Hitoshi Sato

In 2011, the International Commission on Radiological Protection issued a statement on tissue reactions (formerly termed non-stochastic or deterministic effects) to recommend lowering the threshold for cataracts and the occupational equivalent dose limit for the crystalline lens of the eye. Furthermore, this statement was the first to list circulatory disease (cardiovascular and cerebrovascular...

Journal: :Journal of lipid research 1989
S T Mosley S S Kalinowski B L Schafer R D Tanaka

Inhibitors of 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase, the key enzyme that regulates cholesterol synthesis, lower serum cholesterol by increasing the activity of low density lipoprotein (LDL) receptors in the liver. In rat liver slices, the dose-response curves for inhibition of [14C]acetate incorporation into cholesterol were similar for the active acid forms of lovastatin, s...

ژورنال: سنجش و ایمنی پرتو 2019

In the recent years some studies has been done to consider the capability of Tehran Research Reactor for Boron neutron capture therapy (BNCT). The purpose of this study is to evaluate the sensitive organs dose during the treatment of patient with deep brain tumor by TRR. The calculation has been carried out using the Monte Carlo code MCNPX for ZUBAL head and neck phantom. The method was tested ...

2013
Toshi Abe Shigeru Furui Hiroshi Sasaki Yasuo Sakamoto Shigeru Suzuki Tatsuya Ishitake Kinuyo Terasaki Hiroshi Kohtake Alexander M. Norbash Richard H. Behrman Naofumi Hayabuchi

To evaluate low-dose X-ray radiation effects on the eye by measuring the amount of light scattering in specific regions of the lens, we compared exposed subjects (interventional radiologists) with unexposed subjects (employees of medical service companies), as a pilot study. According to numerous exclusionary rules, subjects with confounding variables contributing to cataract formation were exc...

Journal: :iranian journal of medical physics 0
zohreh dehghannia rostami graduated m.sc. student of nuclear physics, physics dept., kn toosi university of technology, tehran, iran. seyed farhad masoudi associate professor, physics dept., kn toosi university of technology, tehran. iran somayeh asadi graduated m.sc. student of nuclear physics, physics dept., kn toosi university of technology, tehran, iran.

introduction: in this paper, by complete definition of human eye containing the various parts and their materials, the difference between this model and a homogeneous water phantom are compared for two ophthalmic plaques using 125i and 103pd. material and methods: the simulation of the two phantoms were performed in the mcnp-4c code and by using the geometry of a three-dimensional eye, differen...

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