Introduction Contrast-enhanced dynamic MR angiography (CE-dMRA) has received considerable attention recently owing to its ability to provide temporal information in addition to the otherwise "static" high-resolution 3-D contrast-enhanced MRA for a variety of clinical indications [1]. While the spatial resolution can reach millimeter and sub-millimeter level, the temporal resolution in CE-dMRA i...

Undersampled projection reconstruction (PR) is investigated as an alternative method for MRA (MR angiography). In conventional 3D Fourier transform (FT) MRA, resolution in the phase-encoding direction is proportional to acquisition time. Since the PR resolution in all directions is determined by the readout resolution, independent of the number of projections (Np), high resolution can be genera...

Analyzing network traffic activities is imperative in security to detect attack patterns. Due the complex nature of event caused by continuously changing computing environments and software applications, identifying patterns one challenging research topics. This study focuses on analyzing effectiveness integrating Multi-Resolution Analysis (MRA) visualization activities. In detail, a Discrete W...

Background and Objective: Cardiac MRI and contrast-enhanced MR angiography (CE-MRA) are gaining interest as non-invasive diagnostic measures for both primary diagnosis and follow up of patients with congenital heart disease (CHD) (1). Due to the presence of complex anatomy and extensive collateral pathways between pulmonary and systemic circulation in patients with CHD, a highly temporally reso...

High resolution panchromatic imagery can be used to increase the spatial resolution of low resolution spectral imagery through spatial/spectral sharpening techniques. Recently, sharpening techniques have been presented that use a multiresolution analysis by manipulating the images at different resolution scales that use a Laplacian pyramid or wavelet transform. This paper presents a model for s...

PURPOSE To evaluate the clinical benefit of using a new iterative reconstruction technique fully integrated on a standard clinical scanner and reconstruction system using a TWIST acquisition for high-resolution dynamic three-dimensional contrast-enhanced MR angiography (CE-MRA). METHODS Low-dose, high-resolution TWIST datasets of 11 patients were reconstructed using both standard GRAPPA-based...

Purpose: Pulmonary vein isolation by means of catheter ablation is a new therapeutic modality for patients with symptomatic atrial fibrillation. Due to the complex anatomy preprocedual imaging of left atrium and pulmonary veins is helpful for planning catheter intervention. With the advent of electrocardiogram-gated and respiratory-gated 3D steady state free precession (SSFP) sequences covering...

In the present work, we report an efficient implementation of configuration interaction singles (CIS) excitation energies and oscillator strengths using the multi-resolution analysis (MRA) framework to address the basis-set convergence of excited state computations. In MRA (ground-state) orbitals, excited states are constructed adaptively guaranteeing an overall precision. Thus not only valence...

Background Whole-heart coronary MRA permits noninvasive detection of coronary artery disease. In the brain MRI, superresolution (SR) technique has emerged as a method to enhance image resolution and improve diagnostic performance. In the current study, we developed a learning-based SR technique optimized for whole-heart coronary MRA (Figure 1). Summarizing briefly, this SR algorithm consists of...