A dual modality system for high resolution-true conductivity imaging

Date

2001-06-01

Author

Eyüboğlu, Behçet Murat
İder, Yusuf Ziya

Metadata

Show full item record

Item Usage Stats

187
views

0
downloads

In this study, a dual modality imaging system which utilises the magnetic flux density measurements, acquired using Magnetic Resonance Current Density Imaging (MRCDI) techniques, and the surface potential measurements, obtained from conventional Electrical Impedance Tomography (EIT) techniques, to reconstruct high resolution absolute conductivity images. An iterative algorithm is developed to minimise the difference between the current densities calculated based on the potential and the magnetic field measurements. The proposed technique is tested on simulated data with/without noise. The conductivity error is approximately 5% with noise free data and 13% when 10% noise is added to the measurements. The spatial resolution is limited by the worst of the finite element size or half the MRI resolution.

URI

https://hdl.handle.net/11511/76393

Conference Name

Proc. XI Int. Conf. Elec. Bioimpedance (ICEBI) (2001)

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

A MEMS Based Lens Microscanner for Resolution Enhancement of Infrared Imaging Systems Sozak, Ahmet; Simsek, Ertug; Azgın, Kıvanç (2019-01-01) The aim of this study is to demonstrate a Micro Electro Mechanical Systems (MEMS) based in-plane (x and y axes) lens scanner to improve the resolution of Long Wave Infrared Optical Systems (8-12 mu m wavelength). The proposed actuator consists of a 2 axis decoupled stage and has 4 separate V-Shaped (Chevron) thermal actuators which provide sufficient force and displacement to position the lens within required time. Miniaturization of lens has been achieved by using an aspherical surface and optimization of ...
A Modular Superconducting Generator for Offshore Wind Turbines Keysan, Ozan; Mueller, Markus A (2013-05-01) In this study, a new claw-pole type transverse flux superconducting generator topology is presented. The machine has a stationary superconducting field winding, which eliminates electrical brushes and cryocouplers. The machine is specifically designed for low-speed high torque applications such as large offshore wind turbines. The proposed machine is robust and has a modular structure.
A low-cost small pixel uncooled infrared detector for large focal plane arrays using a standard CMOS process Eminoglu, S; Tanrikulu, MY; Tezcan, DS; Akın, Tayfun (2002-04-03) This paper reports the development of a low-cost, small pixel uncooled infrared detector using a standard CMOS process. The detector is based on a suspended and thermally isolated p(+)-active/n-well diode whose forward voltage changes due to an increase in the pixel temperature with absorbed infrared radiation. The detector is obtained with simple post-CMOS etching steps on dies fabricated using a standard n-well CMOS process. The post-CMOS process steps are achieved without needing any deposition or lithog...
A simple out of plane capacitive MEMS accelerometer utilizing lateral and vertical electrodes for differential sensing Terzioglu, Yunus; Kose, Talha; Azgın, Kıvanç; Akın, Tayfun (2015-11-01) This paper presents an out-of-plane (z-axis) accelerometer, which incorporates the use of two different MEMS capacitive electrode structures in combination for implementing a linear closed-loop system. During the implementation, the complexity of the design and fabrication steps of the sensing element is kept at a minimum. The proposed accelerometer uses capacitive MEMS sensing element fabricated with a 4-mask process. This sensing element includes a comb finger type lateral electrode and a vertical paralle...
A Capacitive MEMS Accelerometer Readout with Concurrent Detection and Feedback Using Discrete Components Terzioglu, Yunus; Alper, Said Emre; Azgın, Kıvanç; Akın, Tayfun (2014-05-08) This paper presents an analog readout method for capacitive MEMS accelerometers in which the feedback actuation and capacitive detection are achieved simultaneously on the same electrode set. The presented circuit operates in closed-loop for improved linearity, and it is constructed in a hybrid platform package in which off-the-shelf discrete components are used together with the silicon-on-glass micro-accelerometer. The system is developed as a practical solution to reduce the complexity of the readout cir...

Citation Formats

B. M. Eyüboğlu and Y. Z. İder, “A dual modality system for high resolution-true conductivity imaging,” 2001, vol. 1, p. 409, Accessed: 00, 2021. [Online]. Available: https://hdl.handle.net/11511/76393.