Electrical impedance tomography
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5
seminar projects crazy
Active In SP

Posts: 604
Joined: Dec 2008
27-01-2009, 10:36 AM

Electrical impedance tomography (EIT) is a medical imaging technique in which an image of the conductivity or permittivity of part of the body is inferred from surface electrical measurements. Typically, conducting electrodes are attached to the skin of the subject and small alternating currents are applied to some or all of the electrodes. The resulting electrical potentials are measured, and the process may be repeated for numerous different configurations of applied current.

Proposed applications include monitoring of lung function, detection of cancer in the skin and breast and location of epileptic foci. All applications are currently considered experimental. (For a detailed review of medical applications, see the first reference.[1])

In geophysics a similar technique (called electrical resistivity tomography) is used using electrodes on the surface of the earth or in bore holes to locate resistivity anomalies, and in industrial process monitoring the arrays of electrodes are used for example to monitor mixtures of conductive fluids in vessels or pipes. The method is used in industrial process imaging[2] for imaging conductive fluids. In that context the technique is usually called electrical resistance tomography (note the slight contrast to the name used in geophysics). Metal electrodes are generally in direct contact with the fluid but electronics and reconstruction techniques are broadly similar the medical case.

The credit for the invention of EIT as a medical imaging technique is usually attributed to John G. Webster in around 1978,[3] although the first practical realisation of a medical EIT system was due to David C. Barber and Brian H. Brown.[4] In geophysics, the idea dates from the 1930s.

Mathematically, the problem of recovering conductivity from surface measurements of current and potential is a non-linear inverse problem and is severely ill-posed. The mathematical formulation of the problem is due to Alberto Calder?n,[5] and in the mathematical literature of inverse problems it is often referred to as "Calder?n's Inverse Problem" or the "Calder?n Problem". There is extensive mathematical research on the problem of uniqueness of solution and numerical algorithms for this problem.[6]

For More Read
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
project topics
Active In SP

Posts: 2,492
Joined: Mar 2010
03-04-2010, 07:33 PM


To begin with, the word tomography can be explained with reference to 'tomo' and 'graphy'; 'tomo' originates from the Greek word 'tomos' which means section or slice, and 'graphy' refers to representation. Hence tomography refers to any method which involves reconstruction of the internal structural information within an object mathematically from a series of project and implimentationions. The project and implimentationion here is the visual information probed using an emanation which are physical processes involved. These include physical processes such as radiation, wave motion, static field, electric current etc. which are used to study an object from outside.

Medical tomography primarily uses X-ray absorption, magnetic resonance, positron emission, and sound waves (ultrasound) as the emanation. Nonmedical area of application and research use ultrasound and many different frequencies of electromagnetic spectrum such as microwaves, gamma rays etc. for probing the visual information. Besides photons, tomography is regularly performed using electrons and neutrons. In addition to absorption of the particles or radiation, tomography can be based on the scattering or emission of radiation or even using electric current as well.

When electric current is consecutively fed through different available electrode pairs and the corresponding voltage, measured consecutively by all remaining electrode pairs, it is possible to create an image of the impedance of different regions of the volume conductor by using certain reconstruction algorithms. This imaging method is called impedance imaging. Because the image is usually constructed in two dimensions from a slice of the volume conductor, the method is also called impedance tomography and ECCT (electric current computed tomography), or simply, electrical impedance tomography or EIT.

Electrical Impedance Tomography (EIT) is an imaging technology that applies time-varying currents to the surface of a body and records the resulting voltages in order to reconstruct and display the electrical conductivity and permittivity in the interior of the body. This technique exploits the electrical properties of tissues such as resistance and capacitance. It aims at exploiting the differences in the passive electrical properties of tissues in order to generate a tomographic image.

Human tissue is not simply conductive. There is evidence that many tissues also demonstrate a capacitive component of current flow, and therefore, it is appropriate to speak of the specific admittance (admittivity) or specific impedance (impedivity) of tissue rather than the conductivity; hence, electric impedance tomography. Thus, EIT is an imaging method which maybe used to complement X-ray tomography (computer tomography, CT), ultrasound imaging, positron emission tomography (PET), and others.
Use Search at http://topicideas.net/search.php wisely To Get Information About Project Topic and Seminar ideas with report/source code along pdf and ppt presenaion
seminar paper
Active In SP

Posts: 6,455
Joined: Feb 2012
20-02-2012, 12:24 PM

to get information about the topic Electrical Impedence Tomography full report ppt and related topic refer the link bellow



http://topicideas.org/how-to-electrical-...hy-seminar and presentation-full-report

Important Note..!

If you are not satisfied with above reply ,..Please


So that we will collect data for you and will made reply to the request....OR try below "QUICK REPLY" box to add a reply to this page
Tagged Pages: electrical impedanc tomogaraphy, electrical impedence tomography full presentation, seminar topics project in geophysics, power point presentation on electrical imprdance tomography, earth impedence tomography ppt, electrical impedance tomography, electrical impedance tomography ppt,
Popular Searches: hfss bloch impedance, how to make 8051 pin as high impedance, what is softcores electrical, about microprocessor based impedance relay, high impedance state at pin of 8051, impedance glottography ppt engineering seminar topic, electrical miny progects,

Quick Reply
Type your reply to this message here.

Image Verification
Please enter the text contained within the image into the text box below it. This process is used to prevent automated spam bots.
Image Verification
(case insensitive)

Possibly Related Threads...
Thread Author Replies Views Last Post
  electrical topics for ppt jaseelati 0 205 23-02-2015, 02:59 PM
Last Post: jaseelati
  new electrical seminar topics jaseelati 0 262 18-02-2015, 01:02 PM
Last Post: jaseelati
  autocad electrical ppt jaseelati 0 217 13-01-2015, 01:56 PM
Last Post: jaseelati
  electrical engineering seminar or presentation topics with full report list computer science crazy 11 29,356 12-04-2014, 10:08 PM
Last Post: Guest
  Basic Principles and Functions of Electrical Machines pdf seminar projects maker 0 555 14-09-2013, 03:03 PM
Last Post: seminar projects maker
  FM constant impedance combiners. Theory and tuning Report project girl 2 539 27-08-2013, 09:25 AM
Last Post: study tips
  Development of Sustainable Power for Electrical Resources – SuPER System PPT study tips 0 526 06-08-2013, 12:17 PM
Last Post: study tips
  The E-bomb - A Weapon of Electrical Mass Destruction ppt study tips 0 425 05-07-2013, 03:39 PM
Last Post: study tips
  Electrical Safety PPT study tips 0 505 13-06-2013, 03:51 PM
Last Post: study tips
  Seminar Report on A HIGH PERFORMANCE RECTIFIER FOR ELECTRICAL POWER GENERATION study tips 0 369 01-06-2013, 02:54 PM
Last Post: study tips