Thorax

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The thorax (from Greek "θώραξ" - thorax, "breastplate, cuirass, corslet") is a division of an animal's body that lies between the head and the abdomen. (Wikipedia.org)






Conferences related to Thorax

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2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.


2019 41st Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC)

The conference program will consist of plenary lectures, symposia, workshops andinvitedsessions of the latest significant findings and developments in all the major fields ofbiomedical engineering.Submitted papers will be peer reviewed. Accepted high quality paperswill be presented in oral and postersessions, will appear in the Conference Proceedings and willbe indexed in PubMed/MEDLINE & IEEE Xplore


2019 IEEE 16th International Symposium on Biomedical Imaging (ISBI)

The IEEE International Symposium on Biomedical Imaging (ISBI) is the premier forum for the presentation of technological advances in theoretical and applied biomedical imaging.ISBI 2019 will be the 16th meeting in this series. The previous meetings have played a leading role in facilitating interaction between researchers in medical and biological imaging. The 2019 meeting will continue this tradition of fostering cross fertilization among different imaging communities and contributing to an integrative approach to biomedical imaging across all scales of observation.


2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting

The conference is intended to provide an international forum for the exchange of information on state-of-the-art research in antennas, propagation, electromagnetics, and radio science.


2019 IEEE International Ultrasonics Symposium (IUS)

The conference covers all aspects of the technology associated with ultrasound generation and detection and their applications.


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Periodicals related to Thorax

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Biomedical Circuits and Systems, IEEE Transactions on

The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


Computers, IEEE Transactions on

Design and analysis of algorithms, computer systems, and digital networks; methods for specifying, measuring, and modeling the performance of computers and computer systems; design of computer components, such as arithmetic units, data storage devices, and interface devices; design of reliable and testable digital devices and systems; computer networks and distributed computer systems; new computer organizations and architectures; applications of VLSI ...


Engineering in Medicine and Biology Magazine, IEEE

Both general and technical articles on current technologies and methods used in biomedical and clinical engineering; societal implications of medical technologies; current news items; book reviews; patent descriptions; and correspondence. Special interest departments, students, law, clinical engineering, ethics, new products, society news, historical features and government.


Image Processing, IEEE Transactions on

Signal-processing aspects of image processing, imaging systems, and image scanning, display, and printing. Includes theory, algorithms, and architectures for image coding, filtering, enhancement, restoration, segmentation, and motion estimation; image formation in tomography, radar, sonar, geophysics, astronomy, microscopy, and crystallography; image scanning, digital half-toning and display, andcolor reproduction.


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Most published Xplore authors for Thorax

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Xplore Articles related to Thorax

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The SVEC III vectorcardiographic lead system

IEEE Engineering in Medicine and Biology Magazine, 2004

The properties of the stereovectorelectrocardiography (SVEC) III vectorcardiographic (VCG) lead system designed by Schmitt and Simonson are described. The theoretical and clinical aspects of this system are compared with the two other widely applied systems, of Frank and McFee. The theory and short history of VCG recording are also discussed.


Comparative proteomics of Drosophila indirect flight muscle and tergal depressor of the trochanter to determine expression of troponin isoforms

2015 41st Annual Northeast Biomedical Engineering Conference (NEBEC), 2015

Stretch activation (SA) is a delayed increase in force generation in response to muscle stretch that occurs to various degrees in all muscle types. The mechanism behind SA is unknown, but likely involves a thin filament mechanism. Therefore, more information about thin filament proteins involved in muscle contraction is needed. Results comparing muscles with very high and almost no SA ...


RF based feedback system for cardiopulmonary resuscitation

2012 IEEE Topical Conference on Biomedical Wireless Technologies, Networks, and Sensing Systems (BioWireleSS), 2012

This paper presents a novel approach to cardiopulmonary resuscitation (CPR) feedback. The underlying concept is based on an RF transmission through the thorax. With the help of CT images, the link budget is estimated and verified via a full 3D EM simulation of a human body model. Different antennas and operating frequencies between 868 MHz and 2.4 GHz are investigated, ...


Importance of the tissue conductivity values in modelling the thorax as a volume conductor

Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society. 'Magnificent Milestones and Emerging Opportunities in Medical Engineering' (Cat. No.97CH36136), 1997

Various thoracic inhomogeneities affect the measured surface ECG signal. Similarly when the conductivities of these inhomogeneities change the ECG may change as well. Conductivity of tissue may change due to variation in body water and electrolyte balance e.g. due to many diseases. Furthermore, there exits uncertainty regarding the correct values of tissue conductivities and their inter- and intrapatient alterations. Thus ...


Histogram-driven multi-dimensional adaptive filtering (HD-MAF)

2007 IEEE Nuclear Science Symposium Conference Record, 2007

Image noise is one of the main restrictions in computed tomography (CT) with respect to the trade-off between resolution and dose. An HD-MAF is proposed based on a local histogram function identifying the most representative CT value. The local histogram function is computed over an n-dimensional homogenous subvolume which is defined by a principal component analysis. Image filtering affects only ...


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Educational Resources on Thorax

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IEEE.tv Videos

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IEEE-USA E-Books

  • The SVEC III vectorcardiographic lead system

    The properties of the stereovectorelectrocardiography (SVEC) III vectorcardiographic (VCG) lead system designed by Schmitt and Simonson are described. The theoretical and clinical aspects of this system are compared with the two other widely applied systems, of Frank and McFee. The theory and short history of VCG recording are also discussed.

  • Comparative proteomics of Drosophila indirect flight muscle and tergal depressor of the trochanter to determine expression of troponin isoforms

    Stretch activation (SA) is a delayed increase in force generation in response to muscle stretch that occurs to various degrees in all muscle types. The mechanism behind SA is unknown, but likely involves a thin filament mechanism. Therefore, more information about thin filament proteins involved in muscle contraction is needed. Results comparing muscles with very high and almost no SA capabilities show a preliminary difference in troponin I (TnI); however, tests with higher resolution and specificity are planned to further elucidate the connection between key muscle proteins and SA.

  • RF based feedback system for cardiopulmonary resuscitation

    This paper presents a novel approach to cardiopulmonary resuscitation (CPR) feedback. The underlying concept is based on an RF transmission through the thorax. With the help of CT images, the link budget is estimated and verified via a full 3D EM simulation of a human body model. Different antennas and operating frequencies between 868 MHz and 2.4 GHz are investigated, in terms of their ability to assist CPR. The fabricated antennas are matched to the thorax wave impedance and were evaluated in animal and human experiments. It is shown that the thorax compression during a CPR can be monitored with the proposed RF based approach.

  • Importance of the tissue conductivity values in modelling the thorax as a volume conductor

    Various thoracic inhomogeneities affect the measured surface ECG signal. Similarly when the conductivities of these inhomogeneities change the ECG may change as well. Conductivity of tissue may change due to variation in body water and electrolyte balance e.g. due to many diseases. Furthermore, there exits uncertainty regarding the correct values of tissue conductivities and their inter- and intrapatient alterations. Thus the effects of these changes on the ECG signal parameters and on the forward and inverse ECG problem may be of importance. An accurate thorax model based on finite difference method featuring the anatomy of the Visible Human Man was developed. The effects of conductivity changes were determined by increasing the conductivity by 10%-a change that can be of physiological origin. X, Y and Z components of a current dipole source located at the center of the heart were energized and corresponding ECG signals were determined. Results indicated that physiological changes of tissue conductivity produced marked changes in ECG signal, which should be considered in modelling and in ECG analysis. The results manifested the importance of the correct conductivity values. When constructing accurate models of human thorax as a volume conductor the correct tissue conductivities may be more important than the accuracy of anatomical features.

  • Histogram-driven multi-dimensional adaptive filtering (HD-MAF)

    Image noise is one of the main restrictions in computed tomography (CT) with respect to the trade-off between resolution and dose. An HD-MAF is proposed based on a local histogram function identifying the most representative CT value. The local histogram function is computed over an n-dimensional homogenous subvolume which is defined by a principal component analysis. Image filtering affects only predefined CT values which can be seen as image background. The filter method was applied to images of a low-contrast phantom, a low-dose head scan and a thorax scan. For the low-contrast phantom the contrast to noise ratio (CNR) was increased by a factor of 1.8. For the head images a noise reduction of 48% was achieved improving the overall image impression. The corresponding difference images showed no loss of structural information. The 4-dimensional HD- MAF provided images without motion artefacts in the pericardiac region and an overall reduced image noise. HD-MAF is a feasible method for low-contrast enhancement.

  • The pseudo-inverse solution-attenuation compensated body surface potential maps

    Data from a computer model of the human thorax are used to obtain an indication of the dispersal and attenuation of a signal as it passes from epicardium to body surface. From this the authors derive a pseudo-inverse solution whereby the ECG signals recorded from each of 37 body-surface sites are attenuation-compensated. The effect is that body-surface locations where small-amplitude signals are found are amplified, while areas of large- amplitude signals remain unaffected. By enhancing body-surface potential maps in this way, it may be possible to observe extra clinically useful information without resorting to elaborate and time-consuming research to obtain an inverse solution. To illustrate this point, the authors describe the effects of using their technique on recording taken from patients exhibiting acute inferior myocardial infarction and ischemic changes during exercise testing.<<ETX>>

  • Model-based approach to the localization of infarction

    A model-based approach to noninvasively determine the location and size of the infarction scar is proposed, that in addition helps to estimate the risk of arrhythmias. The approach is based on the optimization of an electrophysiological heart model with an introduced infarction scar to fit the multichannel ECG measured on the surface of the patient's thorax. This model delivers the distributions of transmembrane voltages (TMV) within the ventricles during a single heart cycle. The forward problem of electrocardiography is solved in order to obtain the simulated ECG of the patient. This ECG is compared with the measured one, the difference is used as the criterion for optimization of model parameters, which include the site and size of infarction scar.

  • A 3-D finite element mesh generator for complex volumes

    A 3-D mesh generator for finite element analysis of electromagnetic field problems has been developed. The software is capable of handling complex topologies such as the organs of the human body. The grid is optimized by performing Delaunay correction. The use of digital image processing techniques is suggested to extract topological information from images. This information is used for identifying the regions of the model by plating initial nodes on the surfaces. An application example shows a simplified model of the human thorax created using the grid generator. It should be noticed that this problem includes most of the difficulties encountered in 3-D mesh generation for the finite element method.<<ETX>>

  • Modelling of the electric potential distribution in a thorax phantom for Electrical Impedance Tomography using the Finite Element Method

    Electrical impedance tomography (EIT) is a non-invasive technique for the estimation with a high temporal resolution of the spatial impedance distribution in a cross section of the body. Electrodes are attached around the domain of interest (e.g. the thorax). Small alternating currents are injected and potentials are measured and used for reconstruction. The reconstructed impedance images can be particularly useful for the treatment of patients with acute respiratory distress syndrome (ARDS). This severe disease is characterised by atelectases and lung oedema and, thus, changes of the impedance distribution in the thorax. An electrolytic thorax phantom is used for the analysis of different pathology states. It contains simple functional units that mechanically simulate heart and lung. In order to increase flexibility regarding the positioning of the electrodes, the simulation of the pathology, the positions of the organs and tissue properties, a parameterised adjustable 2D-model has been developed. The potential and current distributions are computed using the finite element method (FEM). The obtained images show the potential for automatic closed-loop parameterisation and reconstruction algorithm evaluation.

  • A finite element model with node renumbering for adaptive impedance imaging

    An electrical impedance tomography (EIT) method is considered in which 32 electrodes are placed around the thorax, currents are injected, and voltages are measured to reconstruct a cross-sectional image of resistivity. The authors solve the forward problem using the finite-element method (FEM). The number of elements determines the spatial resolution of the resistivity image. An adaptive current-injection method to provide an optimal current distribution is used. The modified Newton-Raphson method is used as the reconstruction algorithm. The authors use sparse matrix techniques with node renumbering methods to minimize the computation time.<<ETX>>



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