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Electro-impedance Tomography Device And Method

A technology of electrical impedance tomography, scanning equipment, applied in the direction of diagnosis, diagnostic recording/measurement, medical science, etc., to achieve the effect of improving quality

Inactive Publication Date: 2014-08-06
DRAGER MEDICAL AG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But it could also be a real physiological effect whose cause has not been fully explained

Method used

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  • Electro-impedance Tomography Device And Method
  • Electro-impedance Tomography Device And Method
  • Electro-impedance Tomography Device And Method

Examples

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Embodiment Construction

[0030] exist figure 1 Shown in is the curve 1 of the average impedance change as a function of time during an inspiration and the subsequent expiration and the curve 2 of the respiratory volume measured by the breathing device, where the two curves coincide so well that they are in figure 1 cannot be decomposed.

[0031] Now first described in Figure 5 The structure and mode of operation of the EIT device shown schematically in . The EIT device has electrodes 7 which can be placed annularly around the patient's chest. The remaining components shown, apart from the display devices 22 and 23 , are part of the control and evaluation unit, wherein the different functions of the control and evaluation unit are shown here as separate modules. But this does not mean that these modules have to be physically separate units. Rather, the different functions of the control and analysis unit can be implemented in a digital processor, where in Figure 5 The different modules shown in ...

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Abstract

The apparatus has a control and evaluation unit to supply alternating voltage to one pair of electrode while supplying voltage or current signal as a measurement signal to other pair of electrodes to reconstruct a matrix from pixels of measurement signal. The sequence of reconstructed matrix is obtained over inspiration and expiration of pixel time series to compare associated series of impedance alteration with time series of middle impedance alteration. The associated pixel is evaluated, if measure of deviation satisfies a predetermined threshold criterion. An independent claim is included for a method for receiving a sequence of EIT images of a cross sectional plane of thorax of patient.

Description

technical field [0001] The invention relates to an electrical impedance tomography device with a plurality of electrodes that can be placed around the patient's chest, a control and analysis unit designed to feed at least one electrode pair as a feeding electrode pair supplying an alternating current or an alternating voltage, using a plurality of the remaining electrode pairs to respectively record a voltage signal or a current signal as a measurement signal, operating a continuous electrode pair different from the feeding electrode pair to use a reconstruction algorithm from said A matrix of image elements representing the distribution of the impedance change in the electrode plane is reconstructed from the measurement signal, and the measurement signal and the reconstruction matrix are recorded repeatedly over time. Background technique [0002] Such an electrical impedance tomography device (ETI device) is known, for example, from EP1000580A1, which is used to record an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B5/053
CPCA61B5/0809A61B5/0536A61B5/7242A61B5/7246
Inventor Y.格贝尔
Owner DRAGER MEDICAL AG & CO KG
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