A five-parameter modified logistic equation is presented that describes the signal enhancement in magnetic resonance dynamic contrast enhanced imaging (MRI-DCE). In this heuristic model, P(1) approximates the baseline signal, P(2) is related to the magnitude of the peak signal enhancement, P(3) is the approximate time of the maximum rate of increase of signal, P(4) is related to the maximum rat...

PURPOSE To investigate the correlations between parameters of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) and prognostic factors in rectal cancer. MATERIALS AND METHODS We studied 29 patients with rectal cancer who underwent gadolinium contrast-enhanced, T1-weighted DCE-MRI with a three Tesla scanner prior to surgery. Signal intensity on DCE-MRI was independently measured b...

Sparse signal recovery aims to recover an unknown signal x ∈ R from few non-adaptive, possibly noisy, linear measurements y∈R using a nonlinear sparsity-promoting algorithm, under the assumption that x is sparse or compressible with respect to a known basis or frame [1]. Specifically, y = Ax+ e, where A ∈ Rm×n is the measurement matrix, e ∈ R is the measurement error, and m n. Many of the spars...

In this paper, we propose a reinforced Blocking Matrix of TFGSC by incorporating a cross channel projection for speech enhancement. Transfer function GSC (TF-GSC) proposed by Gannot was aimed at improving speech quality but the desired speech signal becomes somewhat distorted since the reference signal resulting from blocking matrix significantly contains the desired signal. The proposed reinfo...

BACKGROUND AND PURPOSE Salivary duct carcinoma (SDC) is regarded as a high-grade malignancy in the current classification of salivary gland neoplasms. The aim of our study was to describe the MR imaging features of SDC. METHODS Nine patients with SDC underwent MR imaging study. The apparent diffusion coefficient (ADC) values of SDCs were measured from diffusion-weighted images. Time-signal in...

The inference of correlated signal fields with unknown correlation structures is of high scientific and technological relevance, but poses significant conceptual and numerical challenges. To address these, we develop the correlated signal inference (CSI) algorithm within information field theory (IFT) and discuss its numerical implementation. To this end, we introduce the free energy exploratio...

Abstract The Lunar Dust Experiment (LDEX) on board the Atmosphere and Environment Explorer mission orbited Moon from 2014 September to 2015 April observed a dynamic, permanently present dust cloud produced by continual meteoroid bombardment. In addition measuring individual ejecta with radii >0.3 μ m, LDEX also recorded an integrated current of collective signal generated impacts smaller par...

AIMS Cardiac involvement in sarcoidosis is reported in up to 30% of patients. Left ventricular involvement demonstrated by contrast-enhanced cardiac magnetic resonance has been well validated. We sought to determine the prevalence and distribution of right ventricular late gadolinium enhancement in patients diagnosed with pulmonary sarcoidosis. METHODS AND RESULTS We prospectively evaluated 8...