Abstract Spectral computed tomography (CT) imaging is one of several image reconstruction techniques based on the use dual-layer CT. The intensity and attenuation radiation are measured in relation to different wavelengths, such a procedure results complex three-dimensional (3D) (pseudo) color adjustment soft tissue. This paper compares true non-contrast (TNC) enhanced images with virtual (VNC)...

Abstract Background Breast cancer is the most common malignancy in females around world representing 25.1% of all cancers. The high prevalence and need for early treatment breast highlight importance accurate diagnosis. In order to achieve this target, it necessary select appropriate modality investigation. Early detection by conventional mammography tends reduce mortality; however, has a low s...

Abstract   The present paper is devoted to implementation of the immersed boundary technique into the Fourier pseudo-spectral solution of the vorticity-velocity formulation of the two-dimensional incompressible Navier-Stokes equations. The immersed boundary conditions are implemented via direct modification of the convection and diffusion terms, and therefore, in contrast to some other similar ...

The current Mars exploration strategy calls first for the detection from orbit of materials of interest for astrobiology and landing site selection. This places the productivity of the 1996 Global Surveyor Thermal Emission Spectrometer (TES) and the 2001 Mars Odyssey 9-band radiometer THEMIS in the critical path of this strategy. Most predictions of mineral detection limits for TES and THEMIS a...

Research on infants’ ability to discriminate speech sounds with different directions of spectral tilt can be used to optimise the frequency response of hearing aids being fitted to very young infants. In the current study, infants were presented with a fricative contrast with either a positive or negative spectral tilt, or in unmodified form. The results showed 6-month-olds were able to discrim...

A procedure is developed to quantify and improve the signal-to-noise ratio (SNR) of Magnetic Resonance images. The image SNR is quanti ed using the correlation function of two independent acquisitions of an image. To test the performance of the quanti cation, SNR measurement data are tted to theoretically expected curves. The proposed correlation technique is also used to improve the SNR by est...

The acoustic features useful for converting auditory information into perceived objects are poorly understood. Although auditory cortex neurons have been described as being narrowly tuned and preferentially responsive to narrowband signals, naturally occurring sounds are generally wideband with unique spectral energy profiles. Through the use of parametric wideband acoustic stimuli, we found th...

This paper proposed an efficient method for contrast enhancement of real world hyper spectral images. The contrast of image is an important characteristic by which the quality of image can be judged as good or poor quality. The proposed method is consists of two stages: In first stage the poor quality of image is process by automatic contrast adjustment in spatial domain and in second stage the...