منابع مشابه
Phase-sensitive sodium B1 mapping.
Quantitative sodium MRI requires accurate knowledge of factors affecting the sodium signal. One important determinant of sodium signal level is the transmit B(1) field strength. However, the low signal-to-noise ratio typical of sodium MRI makes accurate B(1) mapping in reasonable scan times challenging. A new phase-sensitive B(1) mapping technique has recently been shown to work better than the...
متن کامل3D Phase Sensitive B1 Mapping
INTRODUCTION: Sodium MRI shows promise in assessing cartilage health [1], characterizing tumors [2], detecting abnormal sodium levels in the kidneys [3], and assessing tissue damage following stroke [4]. However, relatively low Na concentrations in biological tissues, a rapid biexponential signal decay, and a low gyromagnetic ratio make sodium MRI challenging. Recent improvements in MRI hardwar...
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Aflatoxin B I (AFB) isa well known hepatocarcinogen in several animal species and probably a causative agent in human hepatocellular carcinoma. Humans are exposed to AFB by ingesting contaminated food. Aflatoxin contamination encountered in human foods is usually at low levels which is difficult to measure by chromatographic methods. Therefore in the present study we have developed an immun...
متن کاملMapping B n into B 2 n − 1
In this paper, we are concerned with the classification problem of proper holomorphic maps between balls in complex spaces. Write Bn = {z ∈ Cn : |z| < 1} and Prop(Bn,BN ) for the collection of all proper holomorphic maps from Bn into BN . We recall that f, g ∈ Prop(Bn,BN ) are said to be equivalent if there are elements σ ∈ Aut(Bn) and τ ∈ Aut (BN ) such that f = τ ◦ g ◦ σ . It is a well-known ...
متن کاملSodium-level-sensitive sodium channel and salt-intake behavior.
Mammals feel thirsty or develop an appetite for salt when the correct balance between water and sodium in the body fluid has been disrupted, but little is known about the mechanism in the brain that controls salt homeostasis. It has been postulated that the existence of both an osmoreceptor and a specific sodium receptor is required to accommodate the experimental data (Johnson and Edwards, 199...
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ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2010
ISSN: 0740-3194
DOI: 10.1002/mrm.22700