This article is based on a presentation at the meeting of the Japanese Society of Magnetic Resonance in Medicine in September 2016. The purpose is to review the technical developments which have contributed to the current status of contrast-enhanced magnetic resonance angiography (CE-MRA) and to indicate related emerging areas of study. Technical developments include MRI physics-based innovatio...

In recent years, image classification on hyperspectral imagery utilizing deep learning algorithms has attained good results. Thus, spurred by that finding and to further improve the accuracy, we propose a multi-scale residual convolutional neural network model fused with an efficient channel attention (MRA-NET) is appropriate for classification. The suggested technique comprises multi-staged ar...

in this paper, we characterize multiresolution analysis(mra) parseval frame multiwavelets in l^2(r^d) with matrix dilations of the form (d f )(x) = sqrt{2}f (ax), where a is an arbitrary expanding dtimes d matrix with integer coefficients, such that |deta| =2. we study a class of generalized low pass matrix filters that allow us to define (and construct) the subclass of mra tight frame multiwav...

Magnetic resonance angiography (MRA) is established as an important complementary technique to conventional angiography, and contrast–enhanced MRA (CE-MRA) offers even higher contrast between the vascular lumen and surrounding structures. MS-325 is a gadolinium-based MR contrast agent designed specifically for blood-pool imaging, or MRA, and is the only gadolinium-based intravascular contrast a...

Contrast enhanced magnetic resonance angiography (CE-MRA) is a common method for imaging the Adamkiewicz Artery (AKA). Test-bolus imaging methods have long been the mainstream, and recently, a time resolved technique (4D-MRA) is also reported. However, the current rates of detection for both are mixed, and the best method has not been established yet. For AKA, the present rate is 72% left, Th8～...

BACKGROUND AND PURPOSE To systematically analyze conventional angiographic (CA) features of children with primary central nervous system angiitis (cPACNS), to compare and correlate CA and MR angiography (MRA) lesion characteristics, and to define the sensitivity and specificity of MRA with CA as a reference standard. METHODS A retrospective, single-center cohort study of consecutive patients ...

In this work, the bands of a Sentinel-2A image with spatial resolutions of 20 m and 60 m are sharpened to a spatial resolution of 10 m to obtain visible and near-infrared (VNIR) and shortwave infrared (SWIR) spectral bands with a spatial resolution of 10 m. In particular, we propose a two-step sharpening algorithm for Sentinel-2A imagery based on modified, selected, and synthesized band schemes...

Introduction: In principle, gadolinium-enhanced carotid MRA has well-documented advantages over methods based on time-offlight contrast. Unfortunately, conventional Fourier imaging methods fail to achieve adequate spatial resolution because data acquisition is limited to the brief first pass of contrast material. However, the conventional Fourier sampling theorem does not exploit the strong pri...