Výsledky vyhledávání - "Jari O. Karonen"

Cerebellar apparent diffusion coefficient changes in patients with supratentorial ischemic stroke

Autor: M. Könönen, Yawu Liu, Jyrki T. Kuikka, Ritva Vanninen, Jari O. Karonen, Mikko P. Laakso, Esko Vanninen, Juho Nuutinen

Publikováno v: Acta Neurologica Scandinavica. 122:316-322

Crossed cerebellar diaschisis (CCD) is deﬁned as amatched hypoperfusion and hypometabolism inthe cerebellar hemisphere contralateral to a supra-tentorial lesion (1). CCD was ﬁrst reported byBaron et al. (2) in stroke patients in 1980 usingpositro

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1dc0d723619c3818aede3acdfd5a67ba
https://doi.org/10.1111/j.1600-0404.2009.01289.x

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Perfusion differences on SPECT and PWI in patients with acute ischemic stroke

Autor: Hannu J. Aronen, Yawu Liu, Mikko P. Laakso, Jyrki T. Kuikka, Esko Vanninen, Jari O. Karonen, Ritva Vanninen, Juho Nuutinen

Publikováno v: Neuroradiology. 51:687-695

The purposes of the present study were to compare the flow defect volumes on perfusion-weighted magnetic resonance imaging (PWI) and 99mTc-labeled ethylcysteinate dimer (99mTc-ECD) single photon emission computed tomography (SPECT) at acute and subac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a71fcc62a1ed84f2d62b3aee17a2d53c
https://doi.org/10.1007/s00234-009-0569-9

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Crossed Cerebellar Diaschisis in Acute Ischemic Stroke: A Study with Serial SPECT and MRI

Autor: Jyrki T. Kuikka, Yawu Liu, Jari O. Karonen, Esko Vanninen, Juho Nuutinen, Ritva Vanninen

Publikováno v: Journal of Cerebral Blood Flow & Metabolism. 27:1724-1732

This study evaluated the relationship between crossed cerebellar diaschisis (CCD) and (1) lesion volume and location in the acute phase and 1 week after stroke onset and (2) clinical outcome. Twenty-two patients with cerebral ischemic stroke underwen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d276ebb1f87602a93deb7376e36d0c9
https://doi.org/10.1038/sj.jcbfm.9600467

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ApoE polymorphism and acute stroke: a study with diffusion- and perfusion-weighted MRI and MR angiography

Autor: Seppo Soimakallio, Mikko P. Laakso, Ritva Vanninen, Yawu Liu, Jari O. Karonen, Juho Nuutinen, Hannu J. Aronen

Publikováno v: Acta Neurologica Scandinavica. 114:323-328

Objectives We examined whether the apolipoprotein E (ApoE) allele epsilon4 influences imaging findings in stroke as assessed by diffusion- (DWI) and perfusion-weighted (PWI) magnetic resonance imaging, and MR angiography (MRA). Methods Eight ApoE eps

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::93919ce3ea066f3a4c83f995c3a85e5a
https://doi.org/10.1111/j.1600-0404.2006.00654.x

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Automated perfusion-weighted MRI using localized arterial input functions

Autor: Nina M. Menezes, Hannu J. Aronen, Chloe Joan Lopez, Juho Nuutinen, Ming Wang Zhu, Poe Jou Chen, Cory Lorenz, Thomas Benner, Hakan Ay, Jari O. Karonen, Yawu Liu, A. Gregory Sorensen

Publikováno v: Journal of Magnetic Resonance Imaging. 24:1133-1139

Purpose To investigate the utility of an automated perfusion-weighted MRI (PWI) method for estimating cerebral blood flow (CBF) based on localized arterial input functions (AIFs) as compared to the standard method of manual global AIF selection, whic

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2d89be8e05783df808ffc2e352007fa3
https://doi.org/10.1002/jmri.20717

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Effect of using local arterial input functions on cerebral blood flow estimation

Autor: Hakan Ay, Jari O. Karonen, Chloe Joan Lopez, Ming Wang Zhu, Cory Lorenz, Juho Nuutinen, Hannu J. Aronen, Thomas Benner, Yawu Liu, A. Gregory Sorensen

Publikováno v: Journal of Magnetic Resonance Imaging. 24:57-65

Purpose To investigate a previously developed method for perfusion-weighted MRI (PWI) cerebral blood flow (CBF) estimation that uses local arterial input functions (AIFs) in stroke patients, and determine its ability to correct delay and/or dispersio

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1914295ac63649bb43d0bdce1a5f5e97
https://doi.org/10.1002/jmri.20625

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Acute Ischemic Stroke: Predictive Value of 2D Phase-Contrast MR Angiography—Serial Study with Combined Diffusion and Perfusion MR Imaging

Autor: Juho Nuutinen, Yawu Liu, Jari O. Karonen, Hannu J. Aronen, Ritva Vanninen, Seppo Soimakallio, Anna Koskela

Publikováno v: Radiology. 231:517-527

To evaluate phase-contrast magnetic resonance (MR) angiography and diffusion- and perfusion-weighted imaging in predicting evolution of infarction and clinical outcome.Phase-contrast angiographic and diffusion-weighted images obtained 1 and 2 days af

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4b872bf24c420daa1ad081edc5485af5
https://doi.org/10.1148/radiol.2312030565

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Detecting the subregion proceeding to infarction in hypoperfused cerebral tissue: a study with diffusion and perfusion weighted MRI

Autor: Jussi Perkiö, Pauli Vainio, Ritva Vanninen, Jari O. Karonen, Yawu Liu, Juho Nuutinen, Seppo Soimakallio, Hannu J. Aronen

Publikováno v: Neuroradiology. 45:345-351

Diffusion and perfusion weighted MRI have been widely used in ischaemic stroke. We studied 17 patients in whom ischaemic areas showed an ischaemic core, an area of infarct growth and hypoperfused but ultimately surviving tissue. Apparent diffusion co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b361d249223cbc0571504273d30e25b5
https://doi.org/10.1007/s00234-003-0959-3

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Apolipoprotein E Polymorphism and Acute Ischemic Stroke: A Diffusion- and Perfusion-Weighted Magnetic Resonance Imaging Study

Autor: Juho Nuutinen, Jari O. Karonen, Yawu Liu, Ritva Vanninen, Mikko P. Laakso, Seppo Soimakallio, Hannu J. Aronen

Publikováno v: Journal of Cerebral Blood Flow & Metabolism. :1336-1342

Diffusion- and perfusion-weighted magnetic resonance imaging (MRI) was used to study the putative effects of apolipoprotein E (ApoE) polymorphism in stroke. Thirty-one patients with acute stroke, comparative for age and gender were scanned, nine of w

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07905a638c294aa593d95b95967c1573
https://doi.org/10.1097/00004647-200211000-00007

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Evaluation of four postprocessing methods for determination of cerebral blood volume and mean transit time by dynamic susceptibility contrast imaging

Autor: Jussi Perkiö, Hannu J. Aronen, Leif Østergaard, Sauli Savolainen, Yawu Liu, Jari O. Karonen, Aki Kangasmäki

Publikováno v: Magnetic Resonance in Medicine. 47:973-981

Four different postprocessing methods to determine cerebral blood volume (CBV) and contrast agent mean transit time (MTT) by dynamic susceptibility contrast (DSC) MRI were compared. CBV was determined by two different methods that integrate tracer co

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2badfe1fe38ef5d3500d9521c496e041
https://doi.org/10.1002/mrm.10126

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