Medicine Archives — MATLAB Number ONE

Main Effect Of The Propagation Of Ultrasonic Waves In Human Tissues

global MATLAB — Tue, 28 Nov 2017 18:52:15 +0000

Main Effect Of The Propagation Of Ultrasonic Waves In Human Tissues The most obvious effect is heating. Since a significant portion of the energy is absorbed and converted into heat during ultrasound propagation, this could potentially lead to a temperature increase. As the wave intensity is increased, temperature rises and if the temperature becomes higher […]

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Ultrasonic Communications in Human Tissues

global MATLAB — Tue, 28 Nov 2017 18:46:45 +0000

Ultrasonic Communications in Human Tissues Fundamentals of UltrasoundWaves Ultrasounds are mechanical pressure waves with a frequency above the upper limit of human hearing, i.e., 20 kHz. Ultrasounds consist of mechanical vibrations of particles in a material. Even if each particle oscillates around its rest position, the vibration energy propagates as a wave traveling from particle […]

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Spiking Model In Vivo Neurophysiology

global MATLAB — Tue, 28 Nov 2017 13:33:07 +0000

Spiking Model In Vivo Neurophysiology The animals employed for neurophysiological recording were adult, male Long-Evans rats acquired at 4 months of age. The animal protocols used were approved by the University of Kansas Medical Center Institutional Animal Care and Use Committee, and the experiments were performed in compliance with the Guide for the Care and […]

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Noise in MEA recordings

global MATLAB — Tue, 28 Nov 2017 13:22:53 +0000

Noise in MEA recordings In addition to inherent noise coming from the source, i.e. the neuron, as previously described, there are several other sources of additive noise in an extracellular recording coming from the biological interface, the electrode interface and the device employed for recording. The biological noise contains unwanted electrical signatures including action potentials, […]

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Extracellular Recordings In Neuron

global MATLAB — Mon, 27 Nov 2017 10:48:55 +0000

Extracellular Recordings In Neuron Most extracellular recording experiments follow the same general process to collect multiunit activity and identify individual neurons in the environment, albeit employing different methodologies for each step in the process, as depicted in Figure 2.1. Raw signals collected by electrodes are recorded and amplified by an electrophysiological recording system. The incoming […]

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Extracellular Activity In Neuron

global MATLAB — Mon, 27 Nov 2017 10:34:46 +0000

Extracellular Activity In Neuron Neurons are composed of three components: soma, axon, and dendrites. As in any cell, the soma or cell body is responsible for metabolic function, but in neurons it is further specialized to maintain high levels of biosynthetic activity. Inputs are received and integrated by the dendritic arbor (and to a small […]

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Methods to facilitate the study of precise temporal coding in biological and artificial networks

global MATLAB — Mon, 27 Nov 2017 10:24:27 +0000

Neuron Model The brain is a network of billions of neurons , which makes the brain orders of magnitude more dense than state-of-the-art silicon-based VLSI electronic systems and thus challenging to map and study with conventional methods . Furthermore, it is estimated that the human brain can process, analyze, and learn with a power consumption […]

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Accelerating Parallel Image Reconstruction Using Random Projection

global MATLAB — Sun, 26 Nov 2017 19:14:05 +0000

Accelerating Parallel Image Reconstruction Using Random Projection Prologue Random projection has been used for data dimension reduction . The concept of random projection is related to compressed sensing , a topic that has attracted many attentions recently. By projecting the data to lower dimensions using some random matrices with certain properties (e.g., the restricted isometry […]

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Compressed Sensing MRI

global MATLAB — Sun, 26 Nov 2017 18:40:51 +0000

Compressed Sensing MRI Parallel imaging has led to revolutionary progress in the field of rapid MRI in the past two decades. However, as discussed in the previous section, the maximum acceleration that can be achieved in parallel imaging is limited by the number and the design of coils, and ultimately by fundamental electrodynamic principles. Compressed […]

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Parallel MRI

global MATLAB — Sun, 26 Nov 2017 18:18:53 +0000

The Need for Speed in MRI MR imaging speed is of critical importance in many clinical applications. However, the imaging speed with which gradient-encoded MR images can be acquired is fundamentally limited by the sequential nature of gradient-based MR acquisitions, in which only one k-space line can be acquired per unit time. In order to […]

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