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Cranial ultrasound scans are very essential part of the routine investigation of neonatal intensive care. The scan ultrasound image sequence are not only used for real-time diagnosis but also recorded for future diagnosis. In this paper, we analyze and visualize the pulsation amplitude caused by artery pulsation of blood flows from a video stream of ultrasound image sequence by using 1D fast Fourier...
In list-mode acquisition, data is collected as a list of events with different attributes recorded for each event. List-mode reconstruction methods are used in this case. In this paper, we have contributed towards an assessment of resolution properties of list-mode image reconstruction methods, through an investigation of impulse responses, obtained using Local Impulse Response (LIR) function in Penalized-Likelihood...
In the past decade, a number of image encryption algorithms based on chaotic maps have been proposed. Recently, an image encryption algorithm based on chaotic map lattice (CML) is proposed that allows direct encryption and decryption of color digital images. In this paper, we propose an enhanced CML based algorithm for image encryption to improve the security of the algorithm. The performance of the...
In this paper, a method for the detection and segmentation of human motion in moving image sequences is presented. For detecting motion, the intensity of each pixel is convolved with the second derivative of temporal Gaussian smoothing function or temporal Laplacian of Gaussian (LoG) filter. The zero-crossing in a single frame of the resulting function indicates the positions of moving edges. Intensity...
Tissue-motions can represent the strength of artery pulsation of a newborn baby for pediatrics diagnosis. In this paper, we propose a novel method to estimate the tissue-motion quantitatively by combining local and global motion estimation methods, namely combined local-global (CLG) optical flow technique in cranial ultrasonogram of newborn babies. Tissue motions are estimated in different coronal...
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