نتایج جستجو برای: cmb

تعداد نتایج: 5818  

Journal: :Stroke 2013
Kazushi Tsuda

BACKGROUND AND PURPOSE To investigate the relationship between chronic kidney disease (CKD) and MRI-defined cerebral microbleeds (CMB), a harbinger of future intracerebral hemorrhage (ICH), among patients with a recent history of primary ICH. METHODS Using data from a predominantly black cohort of patients with a recent ICH-enrolled in an observational study between September 2007 and June 20...

Journal: :AJNR. American journal of neuroradiology 2009
R N K Nandigam A Viswanathan P Delgado M E Skehan E E Smith J Rosand S M Greenberg B C Dickerson

BACKGROUND AND PURPOSE The emergence of cerebral microbleeds (CMB) as common MR imaging findings raises the question of how MR imaging parameters influence CMB detection. To evaluate the effects of modified gradient recalled-echo (GRE) MR imaging methods, we performed an analysis of sequence, section thickness, and field strength on CMB imaging properties and detection in subjects with cerebral...

Journal: :Stroke 2012
Wenhong Liu Ran Liu Wei Sun Qing Peng Weiwei Zhang En Xu Yan Cheng Meiping Ding Yansheng Li Zhen Hong Jiang Wu Jinsheng Zeng Chen Yao Yining Huang

BACKGROUND AND PURPOSE Cerebral microbleeds (CMB) and white matter lesions (WML) are cerebral small vessel diseases. Hypertension is considered the most important risk factor. Its mechanism is not yet clarified. Our study assessed the association of blood pressure variability (BPV) with CMB and WML progression. METHODS Patients with a history of ischemic stroke within 1 to 6 months were conse...

Journal: :Stroke 2011
W K Tang Y K Chen J Y Lu Winnie C W Chu V C T Mok Gabor S Ungvari K S Wong

BACKGROUND AND PURPOSE Cerebral microbleeds (CMB) are common in stroke survivors and the community-dwelling elderly. The clinical significance of CMB in the development of depression after a stroke is unknown. This study examined the association between poststroke depression (PSD) and CMB. METHODS A cohort of 235 patients with acute lacunar stroke admitted to the stroke unit of a university-a...

2006
Marc Kamionkowski Arthur Kosowsky

■ Abstract In forthcoming years, connections between cosmology and particle physics will become increasingly important with the advent of a new generation of cosmic microwave background (CMB) experiments. Here, we review a number of these links. Our primary focus is on new CMB tests of inflation. We explain how the inflationary predictions for the geometry of the Universe and primordial density...

2008
J. M. KOVAC D. BARKATS

South Pole Station offers a unique combination of high, dry, stable conditions and welldeveloped support facilities. Over the past 20 years, a sequence of increasingly sophisticated CMB experiments at Pole have built on the experience of early pioneering efforts, producing a number of landmark contributions to the field. Telescopes at the South Pole were among the first to make repeated detecti...

2007
Siddharth S. Malu Peter T. Timbie Benjamin D. Wandelt

The past decade has been the most exciting time in cosmology in these respects: 1. The discovery of Dark Energy, and an estimate of the composition of the universe. 2. Advances in the understanding of the composition of dark matter. 3. The discovery that the universe is flat. The following advances have occured in Cosmic Microwave Background (CMB) cosmology: 1. A systematic characterization of ...

2008
Lung-Yih Chiang Pavel D. Naselsky Peter Coles

The quadrupole power of cosmic microwave background (CMB) temperature anisotropies seen in the WMAP data is puzzlingly low. In this paper we demonstrate that Minimum Variance Optimization (MVO), a technique used by many authors (including the WMAP science team) to separate the CMB from contaminating foregrounds, has the effect of forcing the extracted CMB map to have zero statistical correlatio...

1999
Arthur Kosowsky

In forthcoming years, connections between cosmology and particle physics will be made increasingly important with the advent of a new generation of cosmic microwave background (CMB) experiments. Here, we review a number of these links. Our primary focus is on new CMB tests of inflation. We explain how the inflationary predictions for the geometry of the Universe and primordial density perturbat...

1999
A. D. Dolgov A. G. Doroshkevich D. I. Novikov I. D. Novikov

Geometrical and statistical properties of polarization of CMB are analyzed. Singular points of the vector field which describes CMB polarization are found and classified. Statistical distribution of the singularities is studied. A possible signature of tensor perturbations in CMB polarization is discussed. For a further analysis of CMB statistics Minkowski functionals are used, which present a ...

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