Topics

Human Electrical-Impedance-Tomography Reconstruction Models

2016-05-18 10:31:09 | BioPortfolio

Summary

Current EIT analyses are based on the assumption of a circular thorax-shape and do not provide any information on lung borders. The aim is to obtain the body and lung border contours of male subjects by multi-detector computed tomography (MDCT) in defined thresholds of anthropometric data (gender = male; height; weight) for calibration of more realistic EIT reconstruction models.

Description

A major drawback of EIT is its relatively poor spatial resolution and its limitation in measuring changes in bioimpedance as compared to a reference state (and not absolute quantities). Therefore, the technique cannot differentiate between extrapulmonary structures (muscles, thorax, heart, large vessels, spine, etc.) and non-aerated lung tissues - which is a major limitation for the clinical use of information derived from EIT-imaging. Moreover, current EIT-reconstruction algorithms are based on the consideration of a complete circular thoracic shape and do not take into account the body contours and lung borders.

The investigators are convinced that EIT-derived dynamic bedside lung imaging can be advanced by morphing computed tomography (CT) scans of the respective thoracic levels with concomitant EIT images - thus enhancing EIT-image information with CT-data. Integrating the anatomy of thoracic shape and lung borders provided by high-spatial resolution multi detector CT-scans (MDCT) with high-temporal resolution EIT has the potential to improve image quality considerably. This data can be used to compute mean EIT-reconstruction models that further offer the possibility to develop novel and clinically meaningful EIT parameters.

Therefore, the investigators hypothesize that by integration of CT-scan information of body and lung contours (and by computing different EIT reconstruction models) the current methodological limitations of EIT technology can be overcome.

Study Design

Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Diagnostic

Conditions

Respiratory Monitoring

Intervention

"electrical impedance tomography"

Status

Not yet recruiting

Source

Medical University of Vienna

Results (where available)

View Results

Links

Published on BioPortfolio: 2016-05-18T10:31:09-0400

Clinical Trials [2764 Associated Clinical Trials listed on BioPortfolio]

The Role of Chest Electrical Impedance Tomography in the Pediatric Ventilator Weaning

To correlate the data obtained by Electrical impedance tomography (EIT) during the spontaneous breathing trials (SBT) on a T-piece, in children, with failure in the trial and Extubation fa...

Comparison of Different PEEP Titration Strategies Using Electrical Impedance Tomography in Patients With ARDS

The aim of the this study is to assess the short term physiological effects of 3 ventilation strategies for adult patients with ARDS admitted to intensive care unit. Two of those strategi...

Genesis Electrical Impedance Tomography (EIT): A Preliminary Study

The purpose of this study is to evaluate the Genesis Electrical Impedance Tomography (EIT) imaging system for use in pediatric respiratory disease populations including neuromuscular and b...

Electrical Impedance Tomography for Quantification of Pulmonary Edema in Acute Respiratory Distress Syndrome Patients

Evaluation of pulmonary edema is a key factor in monitoring and guidance of therapy in acute respiratory distress syndrome (ARDS) patients. To date, methods available at the bedside for es...

Electrical Impedance Tomography of Epilepsy

The purpose of this study is to determine if Electrical Impedance Tomography (EIT) can produce reproducible and accurate images in people with epilepsy compared to existing standards such ...

PubMed Articles [10542 Associated PubMed Articles listed on BioPortfolio]

Electrical impedance tomography in clinical use: Unnecessary technology or a unique angle in respiratory monitoring?

Real-time imaging of infarction deterioration after ischemic stroke in rats using electrical impedance tomography.

This study investigated the feasibility of electrical impedance tomography (EIT) for monitoring the deterioration of ischemic lesion after the onset of stroke.

The influence of electrical impedance tomography belt on lung function determined by spirometry in sitting position.

The aim of the study was to examine whether electrode belt of electrical impedance tomography (EIT) changed lung function in healthy volunteers, patients with respiratory muscle weakness (RMW) and chr...

Managing erroneous measurements of dynamic brain electrical impedance tomography after reconnection of faulty electrodes.

Measurements of dynamic brain electrical impedance tomography (EIT) may suffer from electrode detachment. After the faulty electrodes are reset, EIT can restore to steady monitoring but the corrupted ...

In vivo imaging of deep neural activity from the cortical surface during hippocampal epileptiform events in the rat brain using electrical impedance tomography.

Electrical impedance tomography (EIT) is a medical imaging technique which reconstructs images of the internal impedance changes within an object using non-penetrating surface electrodes. To date, EIT...

Medical and Biotech [MESH] Definitions

Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)

Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance).

A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. It is used principally to calculate stroke volume and cardiac volume, but it is also related to myocardial contractility, thoracic fluid content, and circulation to the extremities.

The resistance to the flow of either alternating or direct electrical current.

The electrical response evoked in a muscle or motor nerve by electrical or magnetic stimulation. Common methods of stimulation are by transcranial electrical and TRANSCRANIAL MAGNETIC STIMULATION. It is often used for monitoring during neurosurgery.

More From BioPortfolio on "Human Electrical-Impedance-Tomography Reconstruction Models"

Quick Search

Relevant Topics

Pulmonary
Pulmonary relating to or associated with the lungs eg Asthma, chronic bronchitis, emphysema, COPD, Cystic Fibrosis, Influenza,  Lung Cancer, Pneumonia, Pulmonary Arterial Hypertension, Sleep Disorders etc Follow and track Lung Cancer News ...

Cardiovascular disease (CVD)
Acute Coronary Syndromes (ACS) Blood Cardiovascular Dialysis Hypertension Stent Stroke Vascular Cardiovascular disease (CVD) includes all the diseases of the heart and circulation including coronary heart disease (angina...

Respiratory
Asthma COPD Cystic Fibrosis Pneumonia Pulmonary Medicine Respiratory Respiratory tract infections (RTIs) are any infection of the sinuses, throat, airways or lungs.  They're usually caused by viruses, but they can also ...


Searches Linking to this Trial