منابع مشابه
Phase-sensitive Image Reconstruction
MRI signal is induced by and thus proportional to the transverse component of the precessing magnetization. An MR image then represents a field of 2-dimensional vector that has both a length and a direction. The length is displayed as a magnitude image. The directional information can be described with an angle called phase, forming a phase map behind every magnitude image. Mathematically, a 2d...
متن کاملHigh-sensitive cardiac troponin T
Cardiac troponin is the preferred biomarker for the diagnosis of acute myocardial infarction (AMI). The recent development of a high-sensitive cardiac troponin T (hs-cTnT) assay permits detection of very low levels of cTnT. Using the hs-cTnT assay improves the overall diagnostic accuracy in patients with suspected AMI, while a negative result also has a high negative predictive value. The gain ...
متن کامل[Usefulness of phase-sensitive inversion recovery in delayed enhanced cardiac MRI].
BACKGROUND Delayed-enhancement MRI is a technique that has significant clinical usefulness, particularly for myocardial viability determination in ischemic heart disease. Delayed enhanced images have been acquired by using the inversion recovery(IR)method. It is necessary for the IR method to select optimal inversion time(TI). Recently, the phase-sensitive inversion recovery(PSIR)method has bee...
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...
متن کاملPhase-sensitive narrowband heterodyne holography.
We report on amplitude and phase imaging of out-of-plane sinusoidal surface vibration at nanometer scales with a heterodyne holographic interferometer. The originality of the proposed method is to make use of a multiplexed local oscillator to address several optical sidebands into the temporal bandwidth of a sensor array. This process is called coherent frequency-division multiplexing. It enabl...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Magnetic Resonance in Medicine
سال: 2007
ISSN: 0740-3194,1522-2594
DOI: 10.1002/mrm.21264