نتایج جستجو برای: rcbf

تعداد نتایج: 1214  

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2005
Stelvio Sestini Silvia Ramat Andreas R Formiconi Franco Ammannati Sandro Sorbi Alberto Pupi

UNLABELLED The motor improvement derived from high-frequency deep brain stimulation (DBS) of the subthalamic nucleus (STN) in Parkinson's disease (PD) is maintained over time after surgery. The aim of the present prospective follow-up study was to assess regional cerebral blood flow (rCBF) changes related to such improvement in the long term. METHODS Ten PD patients with STN-DBS underwent 3 r...

Journal: :Journal of nuclear medicine : official publication, Society of Nuclear Medicine 2002
Stelvio Sestini Anita Scotto di Luzio Franco Ammannati Maria Teresa R De Cristofaro Alessandro Passeri Sara Martini Alberto Pupi

UNLABELLED The aim of this study was to investigate the effect of deep-brain stimulation of the subthalamic nucleus (STN) on regional cerebral blood flow (rCBF) throughout the entire brain volume in patients with Parkinson's disease and to evaluate which of the brain areas showing an rCBF increase during STN stimulation related significantly to the improvement in motor function. METHODS Ten c...

Journal: :Journal of neurology, neurosurgery, and psychiatry 1999
S Nagamitsu T Matsuishi M Ishibashi Y Yamashita T Nishimi K Ichikawa K Yamanishi H Kato

OBJECTIVE The aim of the present study was to evaluate the regional cerebral blood flow (rCBF) in patients with postinfectious acute cerebellar ataxia using single photon emission computed tomography (SPECT). METHODS Five children with postinfectious acute cerebellar ataxia and five control subjects were examined. The distribution of rCBF was measured by SPECT imaging after intravenous admini...

Journal: :NeuroImage 2001
R D Badgaiyan D L Schacter N M Alpert

Neuroimaging studies suggest that within-modality priming is associated with reduced regional cerebral blood flow (rCBF) in the extrastriate area, whereas cross-modality priming is associated with increased rCBF in prefrontal cortex. To characterize the nature of rCBF changes in within- and cross-modality priming, we conducted two neuroimaging experiments using positron emission tomography (PET...

Journal: :Neurobiology of aging 2009
Oskar Hansson Peder Buchhave Henrik Zetterberg Kaj Blennow Lennart Minthon Siegbert Warkentin

This study aimed to identify preclinical Alzheimer's disease (AD) in patients with mild cognitive impairment (MCI) using measurements of both regional cerebral blood flow (rCBF) and cerebrospinal fluid (CSF) biomarkers. Baseline rCBF assessments ((133)Xe method) were performed in 70 patients with MCI who were cognitively stable for 4-6 years, 69 patients with MCI who subsequently developed AD, ...

Journal: :AJNR. American journal of neuroradiology 2001
K Kikuchi K Murase H Miki T Kikuchi Y Sugawara T Mochizuki J Ikezoe S Ohue

BACKGROUND AND PURPOSE We generated regional cerebral blood volume (rCBV) and regional cerebral blood flow (rCBF) studies from dynamic susceptibility contrast-enhanced MR images after an intravenous bolus injection of contrast agent (perfusion-weighted imaging [PWI]) by applying indicator dilution theory. We used a multishot echo-planar imaging (EPI) sequence to obtain adequate arterial input f...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 1999
N Kajimura M Uchiyama Y Takayama S Uchida T Uema M Kato M Sekimoto T Watanabe T Nakajima S Horikoshi K Ogawa M Nishikawa M Hiroki Y Kudo H Matsuda M Okawa K Takahashi

To clarify the neural correlates and brain activity during the progression of human non-rapid eye movement (NREM) sleep, we examined the absolute regional cerebral blood flow (rCBF) during light and deep NREM sleep and during wakefulness in normal humans using positron emission tomography with H(2)(15)O. Relative changes in rCBF during light and deep NREM sleep in comparison to the rCBF during ...

2017
Shikai Wang Lina Wang Ping Jing Ping Guo Weifang Zheng Jie Li Mincai Qian

A positive family history plays a key role in the brain pathology of depression patients and previous research has confirmed that disturbed mood maintenance may be related to abnormal regional cerebral blood flow (rCBF). However, little is known about whether the rCBF is different between depression patients with and without family histories. To address this question, we examined the rCBF in dr...

Journal: :Acta neurologica Scandinavica. Supplementum 1977
J Choki T Yamaguchi Y Takeya Y Morotomi T Omae

Regional cerebral blood flow (rCBF) was measured in normotensive rate (NTR) and spontaneously hypertensive rats (SHR), in a lightly anesthetized state and with control of PaCO2 by artificial ventilation. Without carotid artery ligation, NTR and SHR showed almost identical rCBF values and distribution, despite significantly elevated levels of blood pressure in SHR. Bilateral carotid artery ligat...

Journal: :Hypertension 1998
J R Jennings M F Muldoon C M Ryan M A Mintun C C Meltzer D W Townsend K Sutton-Tyrrell A P Shapiro S B Manuck

We asked whether the altered cerebral vasculature associated with essential hypertension might dampen or redirect the regional cerebral blood flow (rCBF) response to cognitive work. Relative rCBF was assessed with [(15)O]water positron emission tomography during a working memory task, a memory span task, and two perceptual control tasks. Unmedicated hypertensive patients and control subjects di...

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