نتایج جستجو برای: phantom

تعداد نتایج: 17254  

Journal: :Physical review 2022

The silicon-vacancy (SiV) and germanium-vacancy (GeV) centers in diamond have a sharp photoluminescence with high brightness. In this work, the of these is measured up to 180 GPa using nanodiamonds integrated anvil cell. results show blueshifts mean emission energy determined by atomic radii impurity. agreement $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phant...

Journal: :Physical review 2021

The accurate description of phonons in a solid is one the central research topics field condensed matter physics and materials science. Here, authors report successful application $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ quantum Monte Carlo (QMC) framework to phonon dispersion calculat...

Journal: :Neuroscience 2016
J B De Graaf N Jarrassé C Nicol A Touillet T Coyle L Maynard N Martinet J Paysant

After limb amputation, patients often wake up with a vivid perception of the presence of the missing limb, called "phantom limb". Phantom limbs have mostly been studied with respect to pain sensation. But patients can experience many other phantom sensations, including voluntary movements. The goal of the present study was to quantify phantom movement kinematics and relate these to intact limb ...

Introduction: One of the main steps in the optimization process in diagnostic imaging is the quality control of radiology devices. The usual method of CT scan calibration is used of a phantom. The phantom created a certain weakening for the radiation through which it passes. One of the most suitable methods for quantitative analysis of the resolution and contrast in CT scan im...

ژورنال: سنجش و ایمنی پرتو 2019

Human tissue equivalent phantoms are widely used in medicine. They are used for dosimetry, calibration of medical devices, and quality control of radiotherapy equipment, as well as training students. Regarding to development of radiotherapy techniques for treatment of cancers and also development of educational centers in the country, the human equivalent phantoms are needed. Several phantoms h...

2017
Syahir Mansor Maqsood Yaqub Dennis Heijtel Martin A. Lodge Ronald Boellaard

Purpose: In longitudinal oncological and brain PET/CT studies it is important to understand the repeatability of quantitative PET metrics in order to assess change in tracer uptake or binding. The present studies were performed in order to assess the aspects of PET/CT repeatability related to reconstruction settings, analysis methods, scan duration (or image noise) and position in the field of ...

Journal: :Physical Review Materials 2023

In this paper, we investigated the anisotropic thermal transport in two-dimensional (2D) perovskite (phenethylammonium lead iodide) nanolayers through a measurement technique called cross-sectional scanning microscopy. method, target layer on substrate was oblique polished with an Ar ion beam to create low-angle wedge nanoscale roughness that is followed by high-vacuum microscopy obtain conduct...

Journal: :Turkish neurosurgery 2017
Orkun Koban Ahmet Öğrenci Onur Yaman Sedat Dalbayrak

Phantom limb pain in amputee patients is not well defined in the literature. Also there is still no clear information on the definition and treatment of phantom radicular pain, in which amputee patients also have radicular pain. This phenomenon, called phantom radiculitis or phantom radiculopathy, has been described in a limited number of cases. If a pathological condition to cause radicular pa...

Journal: :Journal of rehabilitation medicine 2009
Ozlem Ulger Semra Topuz Kezban Bayramlar Gül Sener Fatih Erbahçeci

OBJECTIVE To investigate the effects of phantom limb exercises on phantom limb pain. METHODS A total of 20 traumatic amputees participated in the study. Ten received phantom exercises and prosthetic training, and 10 were treated with routine prosthetic training and a general exercise programme. Intensity of pain was evaluated using a 10-cm visual analogue scale before therapy and after 4 week...

Journal: :Nihon Hoshasen Gijutsu Gakkai zasshi 2009
Chieko Nagashima Nachiko Uchiyama Noriyuki Moriyama Mio Nagata Hiroyuki Kobayashi Katsuhiro Sankoda Shigeru Saotome Masahiro Tagi Tetsurou Kusunoki

Currently daily quality control (QC) tests for mammography systems are generally evaluated by using visual analysis phantoms, which of course means subjective measurement. In our study, however, we evaluated a novel digital phantom, the 1Shot Phantom M plus (1Shot Phantom), together with automatic analysis software dedicated for mammography systems using Fuji computed radiography (FCR). The dig...

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