نتایج جستجو برای: homogeneous phantom

تعداد نتایج: 87222  

2015
Gennaro Vitucci Ivan Argatov Gennady Mishuris

In the present paper, an asymptotic model is constructed for the short-time deformation of an articular cartilage layer modeled as transversely isotropic, transversely homogeneous (TITH) biphasic material. It is assumed that the layer thickness is relatively small compared with the characteristic size of the normal surface load applied to the upper surface of the cartilage layer, while the bott...

Journal: :Physical review 2021

An analysis with a transferred hyperfine field has been performed on the spectra of $^{115}\mathrm{In}$ nuclear quadrupole resonance experiments heavy fermion superconductor ${\mathrm{Ce}}_{3}{\mathrm{PtIn}}_{11}$ exhibiting co-occurrence two successive antiferromagnetic orderings (${T}_{\mathrm{N}1}$ = 2.2 K and ${T}_{\mathrm{N}2}$ 2.0 K) followed by superconducting transition (${T}_{\mathrm{c...

Journal: :Taiwanese Journal of Mathematics 2021

Journal: :Physical review 2021

We construct the coordinate Bethe ansatz for all eigenstates of open $\mathrm{spin}\text{\ensuremath{-}}\frac{1}{2}$ XXZ chain that fulfill phantom roots criterion (PRC). Under PRC, Hilbert space splits into two invariant subspaces and there are sets homogeneous equations (BAE) to characterize in each case. propose vectors with chiral shocks span expand corresponding eigenstates. All factorized...

Journal: :Physical Review Materials 2021

Defect engineering plays an important role in tailoring the electronic transport properties of van der Waals materials. Methods reported so far mainly rely on $e\phantom{\rule{0}{0ex}}x\phantom{\rule{0.333em}{0ex}}s\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}u$ defect type and concentration, hindering realization new types device functionalities associated with engine...

2004
James L. Bedford Peter J. Childs Alan P. Warrington

With intensity-modulated radiotherapy (IMRT), it is important that the inverse planning process yields the most appropriate dose distribution for the patient and that the delivered dose then corresponds to the planned dose. This paper presents methods by which the inverse planning and delivery of segmental (step-and-shoot) IMRT can be verified, and gives results for a typical treatment planning...

2014
Tae Seong Baek Eun Ji Chung Jaeman Son Myonggeun Yoon

PURPOSE The aim of this study is to evaluate the ability of transit dosimetry using commercial treatment planning system (TPS) and an electronic portal imaging device (EPID) with simple calibration method to verify the beam delivery based on detection of large errors in treatment room. METHODS AND MATERIALS Twenty four fields of intensity modulated radiotherapy (IMRT) plans were selected from...

2017
Cliff Richardson Jai Kulkarni

BACKGROUND Phantom limb pain (PLP) occurs in 50% and 80% of amputees. Although it is often classified as a neuropathic pain, few of the large-scale trials of treatments for neuropathic pain included sufficient numbers of PLP sufferers to have confidence that they are effective in this condition. Many therapies have been administered to amputees with PLP over the years; however, as of yet, there...

Journal: :Physics in medicine and biology 2005
Indrin J Chetty Mihaela Rosu Daniel L McShan Benedick A Fraass Randall K Ten Haken

In this study, we show that beam model differences play an important role in the comparison of does calculated with various algorithms for lung cancer treatment planning. These differences may impact the accurate correlation of dose with clinical outcome. To accomplish this, we modified the beam model penumbral parameters in an equivalent path length (EPL) algorithm and subsequently compared th...

Journal: :iranian journal of radiation research 0
s.m. abtahi university of shahid beheshti, radiation medicine department, p. o. box 19839- 63113, tehran, iran s.m.r. aghamiri university of shahid beheshti, radiation medicine department, p. o. box 19839- 63113, tehran, iran h khalafi nuclear science and technology research institute (nstri), tehran, iran f. rahmani university of shahid beheshti, radiation medicine department, p. o. box 19839- 63113, tehran, iran

background: the aim of this work was to establish how well gel dosimeters performed, as substitutes for brain tissue compared with standard phantom materials such as water, polymethyl-methacrylate (or pmma), a150 plastic and te- liquid phantom material for dosimetry of neutron beams in boron neutron capture therapy. materials and methods: thermal neutron fluence, photon dose and epithermal neut...

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