نتایج جستجو برای: homogeneity index

تعداد نتایج: 414426  

Journal: :Rocky Mountain Journal of Mathematics 2011

Farideh Farokhi Moghadam

Introduction: Background: Radiotherapy of parotid tumors is achieved by different radiotherapy techniques. So they deliver the dose to organs at risk such as contralateral parotid, temporal lobe & spinal cord. The consequences of high dose to OARs are xerostomia, Temporal lobe necrosis and loss of hearing. Purpose: The aim of this study was to compare different treatment tech...

Journal: :Radiotherapy and oncology : journal of the European Society for Therapeutic Radiology and Oncology 2007
Winfrid J Melzner Michael Lotter Rolf Sauer Vratislav Strnad

BACKGROUND AND PURPOSE Parameters and indices related to the implant geometry in use for describing the quality of volume implants in interstitial brachytherapy were developed on the basis of LDR-brachytherapy. The aim of our study was to evaluate their usefulness for predicting late toxicity and local control in the PDR-brachytherapy of head-and-neck-tumors. PATIENTS AND METHODS Between Janu...

Journal: :Jurnal Ners dan Kebidanan 2023

Early mobilization is a therapy for the ability of individuals to move freely, easily and regularly. Individuals post operation Section caesarean often feel unable do activity daily living. The research objective was determine effect early on living based dependence postoperative section patients at east seram district general hospital, Maluku. Research design using quasi experimental. study po...

2012
Kimble R Dunster Marlies EJ Friese John F Fraser Graham J Galloway Gary J Cowin Andreas Schibler

BACKGROUND Hyperpolarised helium MRI (He3 MRI) is a new technique that enables imaging of the air distribution within the lungs. This allows accurate determination of the ventilation distribution in vivo. The technique has the disadvantages of requiring an expensive helium isotope, complex apparatus and moving the patient to a compatible MRI scanner. Electrical impedance tomography (EIT) a non-...

2017
Maria del C. Valdés Hernández Victor González-Castro Francesca M. Chappell Eleni Sakka Stephen Makin Paul A. Armitage William H. Nailon Joanna M. Wardlaw

OBJECTIVES We evaluate the alternative use of texture analysis for evaluating the role of blood-brain barrier (BBB) in small vessel disease (SVD). METHODS We used brain magnetic resonance imaging from 204 stroke patients, acquired before and 20 min after intravenous gadolinium administration. We segmented tissues, white matter hyperintensities (WMH) and applied validated visual scores. We mea...

B. Rafie H. Ghanaati M.A. Oghabian N. RiahicAlam Sh. Mehdipour

Introduction: One of the major causes of image non-uniformity in MRI is due to the existence of  non-homogeneity in RF receive and transmit. This can be the most effective source of error in  quantitative  studies  in  MRI  imaging.  Part  of  this  non-homogeneity  demonstrates  the  characteristics of RF coil and part of it is due to the interaction of RF field with the material being  imaged...

2009
P. KRUPSKI

It is proved that no region of a homogeneous locally compact, locally connected metric space can be cut by an Fσ-subset of a “smaller” dimension. The result applies to different finite or infinite topological dimensions of metrizable spaces. The classical Hurewicz-Menger-Tumarkin theorem in dimension theory says that connected topological n-manifolds (with or without boundary) are Cantor manifo...

Journal: :Applied optics 2013
Daehoon Han Kanghee Lee Jongseok Lim Sei Sun Hong Young Kie Kim Jaewook Ahn

Terahertz (THz) time-domain spectroscopy probes the optical properties of naturally occurring solid aggregates of minerals, or stones, in the THz frequency range. Refractive index and extinction coefficient measurement reveals that most natural stones, including mudstone, sandstone, granite, tuff, gneiss, diorite, slate, marble, and dolomite, are fairly transparent for THz frequency waves. Dolo...

2015
Elizabeth Roberto

Decomposition analysis is a critical tool for understanding the social and spatial dimensions of inequality, segregation, and diversity. In this paper, I propose a new measure – the Divergence Index – to address the need for a decomposable measure of segregation. Although the Information Theory Index has been used to decompose segregation within and between communities, I argue that it measures...

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