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Tissue characterization based on impedance images and on impedance measurements

a tissue characterization and image technology, applied in medical science, vaccination/ovulation diagnostics, surgery, etc., can solve the problems of inconvenient impedance imaging of sensors, inconvenient use of gels to improve skin contact, and inconvenient use of devices, etc., to achieve minimal operator expertise, improve and improve uniform and repeatable skin contact, and minimize the risk of cross-patient contamination

Inactive Publication Date: 2005-05-12
TRANSSCAN MEDICAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0015] It is an object of certain aspects of the invention to provide a multi-element probe having improved and more uniform and repeatable contact with the skin with minimal operator expertise and minimal risk of cross-patient contamination.
[0016] It is an object of certain aspects of the invention to provide improved inter-element electrical isolation, and to permit sliding of the probe while it is urged against the skin.
[0021] It is an object of certain aspects of the invention to provide a system for electrical impedance testing of the breast or other body region which provides more accurate information regarding the position of impedance abnormalities detected in the breast or other region.
[0026] It is a further object of certain aspects of the invention to provide a biopsy needle having an impedance measuring function to aid in the taking of a biopsy.
[0029] It is an object of certain aspects of the invention to provide apparatus which facilitates direct comparison between X-Ray and impedance mammographic images, as for example by superposition of the images.

Problems solved by technology

On the other hand, use of gels to improve skin contact carries the risk of cross-talk, dried gel build-up on the elements and inter-patient hygienic concerns.
The sensor which is described is not suitable for impedance imaging.
The device described is not suitable for impedance imaging.

Method used

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  • Tissue characterization based on impedance images and on impedance measurements
  • Tissue characterization based on impedance images and on impedance measurements
  • Tissue characterization based on impedance images and on impedance measurements

Examples

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Embodiment Construction

[0091] Reference is made to FIGS. 1 and 2 which illustrate an impedance mapping device 10 suitable for mapping the impedance of a breast.

[0092] Mapping device 10 includes an imaging head 12, which is described below, which holds the breast and provides contact therewith for providing electrical excitation signals thereto and for receiving resultant electrical signals therefrom. Signals to and from the head are generated and received by a computer / controller 14 which produces impedance maps of the breast under test for display on a monitor 16. The impedance maps may be stored in computer / controller 14 for later viewing or processing or hard copies may be provided by a hard copy device 18 which may be a laser printer, video printer, Polaroid or film imager or multi-imager.

[0093] The entire mapping device 10 may be conveniently mounted on a dolly 20 to facilitate placement of the imaging head with respect to the patient.

[0094]FIG. 1 also shows a hand held probe 100, described in mor...

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Abstract

Apparatus for aiding in the identification of tissue type for an anomalous tissue in an impedance image comprising a first device providing a polychromic immitance map of a portion of the body; a second devise determining a plurality of polychromic measures from one or both of a portion of the body; and a display which displays an indication based on the plurality of polychromic measures.

Description

CROSS REFERENCE TO RELATED APPLICATION [0001] This application is a Continuation-in-Part of International Application No. PCT / US95 / 06141, filed May 19, 1995, the disclosure of which is incorporated by reference in its entirety.FIELD OF THE INVENTION [0002] The present invention relates to systems for tissue characterization based on impedance measurement at a point or at an array of points. BACKGROUND OF THE INVENTION [0003] The measurement of electrical potentials on the skin has many uses. For example, electrocardiograms are derived from measuring the potential generated by the heart of a patient at various points on the skin. [0004] Skin potentials are also measured in apparatus for determining the electrical impedance of human tissue, including two-dimensional (e.g., U.S. Pat. Nos. 5,063,937, 4,291,708 and 4,458,694) or three-dimensional (e.g., U.S. Pat. Nos. 4,617,939 and 4,539,640) mapping of the tissue impedance of the body. In such systems an electrical potential is introduc...

Claims

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Application Information

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IPC IPC(8): A61B5/053A61B17/00A61B17/34A61B19/00
CPCA61B5/0536A61B10/0233A61B17/3403A61B19/52A61B2017/00026A61B2017/00199A61B5/7239A61B2017/3413A61B2019/205A61B2019/5276A61B2562/0209A61B2562/046A61B2017/00438A61B90/17A61B90/36A61B2090/378A61B2562/0215A61B5/6848
Inventor PEARLMAN, ANDREW L.
Owner TRANSSCAN MEDICAL
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