Three-dimensional (3D) digital subtraction angiography (DSA) is the latest development in the neurovascular imaging armamentarium. 3D-DSA combines the anatomic resolution of DSA with 3D visualization abilities previously offered by only CT or MR angiography. 3D-DSA provides more detailed information than does DSA alone in the evaluation of neurovascular lesions, such as cerebral aneurysms. Howe...

This paper presents a continuum design sensitivity analysis (DSA) and optimization of high frequency radiation problems using the Energy Finite Element Method (EFEM) and Energy Boundary Element Method (EBEM). The noise radiated from the vibrating structure at a high frequency range is obtained through a sequential procedure. The structural EFEM calculates structural energy distribution, which i...

Batch verification is a method to verify multiple signatures at once. There are two issues associated with batch verification. One is the security problem and the other is the computational speed. In 1998, Bellare et al. have proposed an approach called small exponents test, to preserve the security of batch verification of a digital signature algorithm (DSA) variant. In this letter, we propose...

INTRODUCTION Patients with negative initial digital subtraction angiography (DSA) are at significant risk for re-bleeding, which can lead to severe disability and death. The purpose of this study was to evaluate the necessity of repeat DSA in subgroups of patients with subarachnoid hemorrhage (SAH) with negative initial DSA. METHODS A total of 904 spontaneous SAH patients were admitted to our...

The current paradigm of cosmic ray (CR) origin states that the most part galactic CRs is produced by supernova remnants. interaction ejecta with interstellar medium after supernova's explosions results in shocks responsible for CR acceleration via diffusive shock (DSA). We use particle-in-cell (PIC) simulations and a combined PIC-magnetohydrodynamic (PIC-MHD) technique to investigate whether DS...

This study aimed to evaluate the early imaging characteristics of cerebral venous sinus thrombosis (CVST). A retrospective analysis was conducted of the clinical and imaging data of 62 patients with CVST diagnosed by magnetic resonance imaging (MRI) and/or digital subtraction angiography (DSA). In the 62 cases, MRI (1.5 T MRI) and magnetic resonance venography (MRV) examinations were conducted ...

The aim of the present study was to describe the association of positive flow cross match (FXM) and C1q-SAB. Methods. In this observational, cross-sectional, and comparative study, patients included had negative AHG-CDC-XM and donor specific antibodies (DSA) and were tested with FXM. All pretransplant sera were tested with C1q-SAB assay. Results. A total of 50 donor/recipient evaluations were c...

BACKGROUND AND PURPOSE Computed tomographic angiography (CTA) is a relatively new and minimally invasive method of imaging intracranial and extracranial blood vessels. The main purpose of this study was to compare CTA to the current gold standard of arterial imaging, digital subtraction angiography (DSA), for the detection and quantification of carotid artery bifurcation stenosis. We also compa...

An electronic Data Sharing Agreement (DSA) is the machine-processable transposition of a traditional paper contract regulating data sharing among different organizations. DSA conveys different information, like the purpose of data sharing, the parties stipulating the contract, the kind of data, and a set of rules stating which actions are authorized, prohibited, and obliged on such data. Possib...

1. Abstract A novel boundary method for implementing design sensitivity analysis (DSA) by FEM is developed in shape optimization problems of an elastic body. A sensitivity formula is derived based on the continuum formulation in a boundary integral form, which consists of the boundary solutions and shape variation vectors. Though the boundary element method (BEM) has mainly been used to obtain ...