Introduction: Voxel based morphometry is a type of statistical parametric mapping that can be used to investigate the effect of diseases such as epilepsy, Alzheimer's disease and Parkinson's disease or other agent such as skills on brain structure (white matter, gray matter and cerebrospinal fluid). The aim of this study is evaluate the effectiveness of this method in detection of differen...

We give a definition of Gray code that, unlike the standard “minimal change” definition, is satisfied by the word-lists in the literature called “Gray codes” and we give several examples to illustrate the various concepts of minimality. We show that a non-recursive generation algorithm can be obtained for a word-list such that all the words with the same prefix (or, equivalently, suffix) are co...

K e y w o r d s W a v e l e t transforms, Image analysis, Edge detectors. 1. I N T R O D U C T I O N To help motivate this paper, we provide an introduction to some interesting problems in image processing. The second section introduces partial derivatives and how they are applied to the gray level values at the pixel locations. The third section introduces a few specific examples such as the v...

A computational method based on Chebyshev series to rigorously compute solutions of initial and boundary value problems of analytic nonlinear vector fields is proposed. The idea is to recast solutions as fixed points of an operator defined on a Banach space of rapidly decaying Chebyshev coefficients and to use the so-called radii polynomials to show the existence of a unique fixed point nearby ...

OBJECTIVES To determine if tumor vascularity as assessed by three-dimensional (3D) power Doppler ultrasound can be used to discriminate between benign and malignant ovarian tumors, if adding 3D power Doppler ultrasound to gray-scale imaging improves differentiation between benignity and malignancy, and if 3D power Doppler ultrasound adds more to gray-scale ultrasound than does two-dimensional (...