نتایج جستجو برای: fetal dosimetry

تعداد نتایج: 95471  

Journal: :acta medica iranica 0
hamid reza khorram khorshid genetic research centre, university of social welfare and rehabilitation sciences, tehran, iran. maryam zargari biology department, science and research branch, islamic azad university (iau), tehran, iran. and reproductive biotechnology research centre, avicenna research institute (acecr), tehran, iran. mohammad reza sadeghi reproductive endocrinology and andrology research centre, avicenna research institute (acecr), tehran, iran. haleh edallatkhah reproductive biotechnology research centre, avicenna research institute (acecr), tehran, iran. mohammad hassan shahhosseiny microbiology department, shahr-e-qods branch, islamic azad university (iau), tehran, iran. koorosh kamali reproductive biotechnology research centre, avicenna research institute (acecr), tehran, iran.

nowadays, new advances in the use of cell free fetal dna (cffdna) in maternal plasma of pregnant women has provided the possibility of applying cffdna in prenatal diagnosis as a non-invasive method. in contrary to the risks of invasive methods that affect both mother and fetus, applying cffdna is proven to be highly effective with lower risk. one of the applications of prenatal diagnosis is fet...

Journal: :The British journal of radiology 2000
J R Williams A Montgomery

The National Radiological Protection Board (NRPB) has recommended the introduction of dose-width product (DWP) for the measurement of patient dose in panoramic dental radiology and has proposed a reference level of 65 mGy mm for adult exposures. This paper describes a method for measuring DWP and dose-area product (DAP) using thermoluminescent dosemeters (TLDs). The technique was used on 16 set...

Journal: :Physics in medicine and biology 2003
F Sánchez-Doblado P Andreo R Capote A Leal M Perucha R Arráns L Núñez E Mainegra J I Lagares E Carrasco

Absolute dosimetry with ionization chambers of the narrow photon fields used in stereotactic techniques and IMRT beamlets is constrained by lack of electron equilibrium in the radiation field. It is questionable that stopping-power ratio in dosimetry protocols, obtained for broad photon beams and quasi-electron equilibrium conditions, can be used in the dosimetry of narrow fields while keeping ...

2009
W. G. ALBERTS

R É S U M É En dosimétrie des neutrons, les situations pratiques rencontrées couvrent un large domaine d'énergie s'étendant sur plus de 10 décades. En outre, les grandeurs dosimétriques utilisées en radioprotection ne sont pas directement accessibles à la mesure. Ce dernier point est principalement dû à la variation de la "qualité" du rayonnement neutronique, exprimé au moyen des facteurs de po...

2004
L J Schreiner

The innovation of adding a gel matrix to the traditional Fricke dosimeter to stabilize geometric information established the field of gel dosimetry for radiation therapy. A discussion of Fricke gels provides an overview of the issues that determine the dose response of all gel dosimeters in general. In this paper we review some of the features of Fricke systems to illustrate these issues and, i...

Journal: :Nuclear medicine and biology 2014
Morten Persson Henrik H El Ali Tina Binderup Andreas Pfeifer Jacob Madsen Palle Rasmussen Andreas Kjaer

UNLABELLED (64)Cu-DOTA-AE105 is a novel positron emission tomography (PET) tracer specific to the human urokinase-type plasminogen activator receptor (uPAR). In preparation of using this tracer in humans, as a new promising method to distinguish between indolent and aggressive cancers, we have performed PET studies in mice to evaluate the in vivo biodistribution and estimate human dosimetry of ...

Journal: :Indian Journal of Dental Research 2015

Journal: :IEEE Transactions on Nuclear Science 1976

2007

At the International Atomic Energy Agency Symposium on "National and International Standardization of Radiation Dosimetry" held in Atlanta during 5 -9 December 1977, it became quile evident that the institutions in the IAEA/WHO network of Secondary Standards Dosimetry Laboratories (SSDLs) have become recognized as having a necessary and well-defined objective. The link they have established wit...

Journal: :Photodiagnosis and Photodynamic Therapy 2006

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