BACKGROUND The fractional flow reserve (FFR) value of 0.75 has been validated against ischemic testing, whereas the FFR value of 0.80 has been widely accepted to guide clinical decision making. However, revascularization when FFR is 0.76 to 0.80, within the so-called gray zone, is still debatable. METHODS AND RESULTS From February 1997 to June 2013, all patients with single-segment disease an...

A modified Hopfield neural network with a novel cost function was presented for detecting wood defects boundary in the image. Different from traditional methods, the boundary detection problem in this paper was formulated as an optimization process that sought the boundary points to minimize a cost function. An initial boundary was estimated by Canny algorithm first. The pixel gray value was de...

Ridges and ravines are the main components constituting a "ngerprint. Traditional automatic "ngerprint identi"cation systems (AFIS) are based on minutiaematching techniques. The minutiae for "ngerprint identi"cation are de"ned by ridge termination and ridge bifurcation. Most AFIS perform ridge line following process to automatically detect minutiae based on binary or skeleton "ngerprint image. ...

A logic network to produce the sequency ordered Hadamard matrix H based on the property of gray code and orthogonal group codes is developed. The network uses a counter to generate Rademacher function such that the output of H will be in sequency. A general purpose shift register with output logic is used to establish a sequence of period P corresponding to a given value of order m of the Hadam...

OBJECTIVE To determine the clinical utility and limitations of guided prostate biopsy Power Doppler in patients with elevated serum PSA levels. MATERIALS AND METHOD Prospective study. From April 2012 to May 2013, 111 men over 45 years of age with serum PSA level greater than 4.0ng/dl who underwent a transrectal prostate biopsy were included. The hypoechoic nodules in the peripheral region wer...

in this work, we analyse a pair of two-dimensional coupled reaction-diusion equations known as the gray-scott model, in which spot patterns have been observed. we focus on stationary patterns, and begin by deriving the asymptotic scaling of the parameters and variables necessary for the analysis of these patterns. a complete bifurcation study of these solutions is presented. the main mathematic...

Ab..tract-The gray-level threshold selection method for im2 e segmen-tation presented here is based on the maximum entropy pri ciple. The optimal threshold value is determined by maximizing the , posteriori entropy subject to certain inequality constraints which are ,Ierived by means of special measures characterizing uniformity and the s 'ape of tbe Manu"cripl rcceivcd Novcmber 3. function h(x...

* Corresponding author. Tel:+886 4 27016855 ext. 1381; Fax:+886 4 27026986 Abstract—This work proposes a reversible data hiding algorithm that is based on the interleaving max-min difference histogram. The method divides the cover image into non-overlapping identical blocks. In each block, the maximum or minimum pixel is selected to calculate absolute differences between the gray level value of...