SU-E-J-61: Design, Construction, and Characterization of the Ultra-Wideband (UWB) Directional Antennae for Biological Tissue Penetration

2013 ◽  
Vol 40 (6Part7) ◽  
pp. 163-163
Author(s):  
E Oh ◽  
S Han-Oh
Keyword(s):  
Biological Tissue ◽  
Ultra Wideband ◽  
Tissue Penetration ◽  
Design Construction

scholarly journals Design, Construction, and Control for an Underwater Vehicle Type Sepiida

Robotica ◽  
2020 ◽  
pp. 1-18
Author(s):  
M. Garcia ◽  
P. Castillo ◽  
E. Campos ◽  
R. Lozano
Keyword(s):  
Embedded System ◽  
Closed Loop ◽  
Underwater Vehicle ◽  
Mathematical Representation ◽  
Closed Loop System ◽  
Vehicle Type ◽  
Mathematical Equations ◽  
And Control ◽  
Design Construction

SUMMARY A novel underwater vehicle configuration with an operating principle as the Sepiida animal is presented and developed in this paper. The mathematical equations describing the movements of the vehicle are obtained using the Newton–Euler approach. An analysis of the dynamic model is done for control purposes. A prototype and its embedded system are developed for validating analytically and experimentally the proposed mathematical representation. A real-time characterization of one mass is done to relate the pitch angle with the radio of displacement of the mass. In addition, first validation of the closed-loop system is done using a linear controller.

Measurement and characterization of indoor ultra-wideband propagation

2004 ◽  
Author(s):  
A.H. Muqaibel ◽  
A. Safaai-Jazi ◽  
A.M. Attiya ◽  
A. Bayram ◽  
S.M. Riad
Keyword(s):  
Ultra Wideband

Characterization of Tissue Microstructure Scatterer Distribution with Spectral Correlation

1993 ◽  
Vol 15 (3) ◽  
pp. 238-254 ◽  
Author(s):  
Tomy Varghese ◽  
Kevin D. Donohue
Keyword(s):  
Formation Process ◽  
Biological Tissue ◽  
Statistical Parameters ◽  
Spectral Correlation ◽  
Tissue Microstructure ◽  
Power Spectral ◽  
Spectral Peaks ◽  
Ultrasound Signal

Characterization of tissue microstructure from the backscattered ultrasound signal using the spectral autocorrelation (SAC) function provides information about the scatterer distribution in biological tissue. This paper demonstrates SAC capabilities in characterizing periodicities in A-scans due to regularity in the scatterer distribution. The A-scan is modelled as a cyclostationary signal, where the statistical parameters of the signal vary in time with single or multiple periodicities. This periodicity manifests itself as spectral peaks both in the power spectral density (PSD) and in the SAC. Periodicity in the PSD will produce a well defined dominant peak in the cepstrum, which has been used to determine the scatterer spacing. The relationship between the scatterer spacing and the spacing of the spectral peaks is established using a stochastic model of the echo-formation process from biological tissue. The distribution of the scatterers within the microstructure is modelled using a Gamma function, which offers a flexible method of simulating parametric regularity in the scatterer spacing. Simulations of the tissue microstructure for lower orders of regularity indicate that the SAC components reveal information about the scatterer spacing that are not seen in the PSD and the cepstrum. The echo-formation process is tested by simulating microstructure of varying regularity and analyzing their effect on the SAC, PSD and cepstrum. Experimental validation of the simulation results are provided using in vivo scans of the breast and liver tissue that show the presence of significant spectral correlation components in the SAC.

Quantitative Characterization of Biological Tissue Using Optical Spectroscopy

2003 ◽  
Author(s):  
Irene Georgakoudi ◽  
Jason Motz ◽  
Vadim Backman ◽  
George Angheloiu ◽  
Abigail Haka ◽  
...  
Keyword(s):  
Optical Spectroscopy ◽  
Biological Tissue ◽  
Quantitative Characterization

SIMULATION OF SINGLE CHANNEL BIOLOGICAL TISSUE SPECTROSCOPY USING COMSOL MULTIPHYSICS

2015 ◽  
Vol 77 (28) ◽  
Author(s):  
Azmi Abou Basaif ◽  
Nashrul Fazli Mohd Nasir ◽  
Zulkarnay Zakaria ◽  
Ibrahim Balkhis ◽  
Shazwani Sarkawi ◽  
...  
Keyword(s):  
Magnetic Induction ◽  
Biological Tissue ◽  
Single Channel ◽  
Medical Condition ◽  
Biological Tissues ◽  
Comsol Multiphysics ◽  
Accurate Information ◽  
Tissue Properties ◽  
Biological Soft Tissue

The enhanced ability to detect accurate location and measure the depth of a   metal inside a biological tissue is very useful in the assessment of medical condition and treatment. This manuscript proposed a solution via the measurement of the tissue properties using magnetic induction spectroscopy (MIS) method to describe the characterization of biological soft tissue. The objective of this study is to explore the viability of locating embedded metal inside a biological tissue by measuring the differences the biological tissue electrical properties using principle of Magnetic Induction Spectroscopy (MIS). Simulation is done using COMSOL Multiphysics software for accurate information on the involved parameters for both metal and biological tissues. Simulation has confirmed that MIS capable of detecting and locate embedded metal inside a biological tissue.

scholarly journals Characterization of the optical properties of color pastes for the design of optical phantoms mimicking biological tissue

2018 ◽  
Vol 12 (4) ◽  
pp. e201800300 ◽  
Author(s):  
Natasha Tomm ◽  
Linda Ahnen ◽  
Helene Isler ◽  
Stefan Kleiser ◽  
Tanja Karen ◽  
...  
Keyword(s):  
Optical Properties ◽  
Biological Tissue

scholarly journals Ultrasound imaging for characterization of biological tissue and function

1978 ◽  
Vol 63 (S1) ◽  
pp. S38-S39
Author(s):  
Balu Rajagopalan ◽  
James F. Greenleaf ◽  
S. A. Johnson
Keyword(s):  
Ultrasound Imaging ◽  
Biological Tissue ◽  
And Function
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