نتایج جستجو برای: kurtosis
تعداد نتایج: 3162 فیلتر نتایج به سال:
A two-stage classifier is used to improve the classification performance between normal and pathological voices. A primary classification between normal and pathological voices is achieved by the Gaussian mixture model (GMM) log-likelihood scores. For samples that do not meet the thresholds for normal or disordered voice in the GMM, the final decision is made by a higher-order statistics (HOS)-...
BACKGROUND AND PURPOSE Diffusion MRI is a promising, clinically feasible imaging technique commonly used to describe white matter changes after stroke. We investigated the sensitivity of diffusion MRI to detect microstructural alterations in gray matter after sensorimotor cortex stroke in adult male rats. METHODS The mean diffusivity (MD) and mean kurtosis of perilesional motor cortex were co...
BACKGROUND The characteristics of atrial electrograms associated with atrial fibrillation (AF) termination are controversial. We investigated the electrogram characteristics that indicate procedural AF termination during continuous complex fractionated electrogram ablation. METHODS AND RESULTS Fifty-two consecutive patients with persistent AF (47 men; aged 54 ± 9 years), who underwent electro...
OBJECTIVE Bipolar disorder (BD) is often misdiagnosed as unipolar depression (UD), leading to mistreatment and poor clinical outcomes. However, little is known about the similarities and differences in subcorticalgray matter regions between BD and UD. METHODS Thirty-five BD patients, 30 UD patients and 40 healthy controls underwent diffusional kurtosis imaging (DKI) and three dimensional arte...
It has been proposed that the receptive elds of neurons in V1 are optimised to generate \sparse", Kurtotic, or \interesting" output probability We investigate the empirical evidence for this further and argue that lters can produce \interesting" output distributions simply because natural images have variable local intensity variance. If the proposed lters have zero D.C., then the probability d...
Purpose: Amyloid deposition in the brain is considered an initial event in the progression of Alzheimer’s disease. We hypothesized that the presence of amyloid plaques in the brain of APP/presenilin 1 mice leads to higher diffusion kurtosis measures due to increased microstructural complexity. As such, our purpose was to provide an in vivo proof of principle for detection of amyloidosis by diff...
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