Preparation and monitoring of small animals in renal MRI

Renal diseases remain devastating illnesses with unacceptably high rates of mortality and morbidity worldwide. Animal models are essential tools to better understand the pathomechanism of kidney-related illnesses and to develop new, successful therapeutic strategies. Magnetic resonance imaging (MRI) has been actively explored in the last decades for assessing renal function, perfusion, tissue oxygenation as well as the degree of fibrosis and inflammation. This chapter aims to provide an overview of the preparation and monitoring of small animals before, during, and after surgical interventions or MR imaging. Standardization of experimental settings such as body temperature or hydration of animals and minimizing pain and distress are essential for diminishing nonexperimental variables as well as for conducting ethical research.This publication is based upon work from the COST Action PARENCHIMA, a community-driven network funded by the European Cooperation in Science and Technology (COST) program of the European Union, which aims to improve the reproducibility and standardization of renal MRI biomarkers

Measuring of Diaphragm Movements by using iMEMS Acceleration Sensor

9th International Conference on Electrical and Electronics Engineering (ELECO) -- NOV 26-28, 2015 -- Bursa, TURKEYWith the development of technology, in the diagnosis of many diseases, electrical signals measured from different points on the human body, offered to doctors by making meaningful with the help of different algorithms. This is quite important for both safer for the patient to be diagnosed more quickly. This paper presents a data acquisition system which has ability to measure and record the movement of diaphragm. The developed measuring device was connected on the five patients whose have different features (age, tall, weight) and the diaphragm movements were monitored. It is showed that the shape of recorded data by the developed system is similar to shape of recorded data by using industrial spirometer instrument. Besides breathing signal, some parameters (FVC, TVC) that play an important role in the detection of some diseases such as COPD also has been obtained and shared at the measurement results section. As a results, our developed system seems to measure and record the breathing movements and some respiratory parameters with great reliability and inexpensive, portable, easy to use.Chamber Elect Engineers Bursa Branch,Istanbul Techn Univ, Fac Elect & Elect Engn,Uludag Univ, Dept Elect & Elect Engn,IEEE, Reg 8,IEEE Turkey Sect, CAS Chapter,Sci & Technol Res Council Turke

Measuring of diaphragm movements by using iMEMS acceleration sensor

9th International Conference on Electrical and Electronics Engineering, ELECO 2015 -- 26 November 2015 through 28 November 2015 -- Bursa -- 119202With the development of technology, in the diagnosis of many diseases, electrical signals measured from different points on the human body, offered to doctors by making meaningful with the help of different algorithms. This is quite important for both safer for the patient to be diagnosed more quickly. This paper presents a data acquisition system which has ability to measure and record the movement of diaphragm. The developed measuring device was connected on the five patients whose have different features (age, tall, weight) and the diaphragm movements were monitored. It is showed that the shape of recorded data by the developed system is similar to shape of recorded data by using industrial spirometer instrument. Besides breathing signal, some parameters (FVC, TVC) that play an important role in the detection of some diseases such as COPD also has been obtained and shared at the measurement results section. As a results, our developed system seems to measure and record the breathing movements and some respiratory parameters with great reliability and inexpensive, portable, easy to use. © 2015 Chamber of Electrical Engineers of Turkey

Detection of respiratory signals according to different positions using acceleration sensor

2015 23rd Signal Processing and Communications Applications Conference, SIU 2015 -- 16 May 2015 through 19 May 2015 -- Malatya -- 113052In this study, a data acquisition system that recording of the movement of diaphragm was designed. At this microcontroller circuit, an acceleration which has ability to define position by using 3-axis Cartesian coordinate systems was used. The information obtained from the sensor, saved to the internal eeprom and transferred to the computer via USB. These data which were received to the computer, were grouped to the axis and plotted by the computer program which is developed at C # programming language. Patient position can be detected as well as the breathing signals form corresponding graph. Hence, it is easy to monitor, at which position and at which duration the patient is making effort. This ability gives us advantage to use this system for sleep apnea study. Meantime, the data transferred to the computer can also be saved in a text file in order to use in Matlab program to investigate both time and frequency analyzes. Since the developed system is portable, it can be used for a number of other study and research. © 2015 IEEE

A New Phase Measurement Technique for RF Power Amplifier Only Measuring Magnitudes

In this study, a new phase measurement setup to measure magnitudes and phases of the fundamental components and intermodulation created by an amplifier under two tone excitation is reported. There are three signal generators, one digital attenuator and one spectrum analyzer in the measurement setup. There is no need to any other special electronic circuits (e.g., mixer, filter, etc.). Phase is found/measured mathematically based on magnitude measurements. Also absolute phase difference between the frequency components can be measured. Measured phase error is better than 1 degrees for repetitive measurements

Wearable Textile Fabric Based 3D Metamaterials Absorber in X-Band

In this paper, a new wearable (flexible) textile fabric based 3D metamaterials absorber (MMA) structure is proposed. The proposed MMA was created from three layers; weft-knitted fabric, silicone, and plain weave fabric and then, it was simulated in Computer Simulation Technology (CST). It was obtained maximum absorption power (99.66%) at 9.38 GHz, and the average absorption power of 81-95% was obtained in the frequency range of 8 to 12 GHz depending on the incident angle in the simulation. The effect of the wearable textile structure on absorption was investigated. When compared with other materials, it can be said that the proposed MMA is broadband, incident angle independent, TE and TM polarization-independent, flexible, breathable, wearable, ease of fabrication, practical, low weight, and cost advantage. With this designed the textile fabric-based MMA, it can be obtained both low reflection coefficients and low transmission coefficients at broadband X-band frequencies. This provides a good solution for the cloaking of radar systems

Behavioral Modeling of Asymmetric Intermodulation Distortion of Nonlinear Amplifier

In this study, a behavioural modelling is proposed to model asymmetric IMD components produced in the two tone excitation of nonlinear amplifiers. Model parameters are extracted based on single tone and two-tone measurement results. Then measurement results and model predictions are compared for a four-tone signal