Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Sean P. Symons"'
Autor:
Sean P. Symons, Dan C. Huynh, Max Wintermark, Andrew Bivard, Jesse Knight, Achala Vagal, Rita Vitorino, Richard H. Swartz, Richard I. Aviv, Thien J. Huynh, Christopher D d'Esterre, Daniel Efkehari, Mark W Parsons
Publikováno v:
Neurovascular Imaging. 2
We sought to quantify CTP-derived infarct core applying previously published perfusion thresholds to multi-institutional CTP data to assess the margin of error for 25 mL and 70 mL critical volume thresholds using early DWI as a reference standard. 60
Autor:
Liying Zhang, Blake D. Murphy, Christopher D d'Esterre, Vivian Li, Ting-Yim Lee, Richard I. Aviv, Gabriella Mallia, Julia Hopyan, Brian Buck, Sean P. Symons
Publikováno v:
Radiology. 250:867-877
To determine whether admission computed tomography (CT) perfusion-derived permeability-surface area product (PS) maps differ between patients with hemorrhagic acute stroke and those with nonhemorrhagic acute stroke.This prospective study was institut
Autor:
Demetrios J. Sahlas, Thien J. Huynh, L. Zhang, Richard I. Aviv, Blake D. Murphy, Sean P. Symons, H. Tu, Sandra E. Black, Jacqueline A. Pettersen, Ting-Yim Lee
Publikováno v:
AJNR Am J Neuroradiol
BACKGROUND AND PURPOSE: Cerebral blood flow (CBF) abnormalities are previously demonstrated in white matter disease. A gradation of change may exist between patients with mild and more severe white matter disease. An association between blood brain b
Autor:
Matthew J. Hogan, Vadim Beletsky, Donald H. Lee, Demetrios J. Sahlas, Andrew M. Demchuk, Ting-Yim Lee, Richard Chan, Richard I. Aviv, Sean P. Symons, Mayank Goyal, Shelagh B. Coutts, Allan J. Fox, Sandra E. Black, David M. Pelz, Irene Gulka, Blake D. Murphy
Publikováno v:
Radiology. 247:818-825
To prospectively determine the parameters derived at admission computed tomographic (CT) perfusion imaging admission that best differentiate ischemic white matter that recovers from that which infarcts, with the latter retrospectively defined at a CT
Publikováno v:
American Journal of Neuroradiology. 33:792-794
With less than stellar success of immediate intra-arterial therapy for acute stroke, Cloft[1][1] mentions the need for “penumbra imaging” or advanced imaging to aid in management decisions. CT and MR approaches to such imaging are still not used
Autor:
Liying Zhang, Richard I. Aviv, Sean P. Symons, Raphael Jakubovic, Ting-Yim Lee, Amanda Murphy, Aaron So
Publikováno v:
Neuroradiology. 56(12)
The purpose of this investigation is to determine if CT perfusion (CTP) measurements at low doses (LD = 20 or 50 mAs) are similar to those obtained at regular doses (RD = 100 mAs), with and without the addition of adaptive statistical iterative recon
Publikováno v:
Neuroradiology. 51(10)
The objective of this study was to determine the radiation dose delivered during comprehensive computed tomography (CT) imaging for acute stroke. All CT examinations performed over 18 months using our acute stroke protocol were included. Protocol inc
Autor:
Richard I. Aviv, Julia Hopyan, Allan J. Fox, David J. Gladstone, Sean P. Symons, Brian Buck, Sandra E. Black, J. Schiff, Gabriella Mallia
Publikováno v:
AJNR Am J Neuroradiol
BACKGROUND AND PURPOSE: Multimodal CT imaging with contrast-enhanced CT angiography (CTA) and CT perfusion (CTP) is increasingly being used to guide emergency management of acute stroke. However, little has been reported about the safety of intraveno
Alberta Stroke Program Early CT Scoring of CT perfusion in early stroke visualization and assessment
Autor:
David J. Gladstone, S. Malham, George Tomlinson, Sean P. Symons, Santanu Chakraborty, J. Mandelcorn, Allan J. Fox, Richard I. Aviv
Publikováno v:
AJNR Am J Neuroradiol
BACKGROUND AND PURPOSE: Qualitative CT perfusion (CTP) assessment by using the Alberta Stroke Program Early CT Score (ASPECTS) allows rapid calculation of infarct extent for middle cerebral artery infarcts. Published thresholds exist for noncontrast
Autor:
Demetrios J. Sahlas, Mayank Goyal, Ting-Yim Lee, David M. Pelz, Andrew M. Demchuk, Vladimir Hachinski, Vadim Beletsky, B.D. Murphy, Shelagh B. Coutts, Richard I. Aviv, Sean P. Symons, Irene Gulka, M.J. Hogan, Allan J. Fox, Sandra E. Black, Donald H. Lee, Richard Chan
Publikováno v:
Stroke. 37(7)
Background and Purpose— We investigated whether computed tomography (CT) perfusion–derived cerebral blood flow (CBF) and cerebral blood volume (CBV) could be used to differentiate between penumbra and infarcted gray matter in a limited, explorato