Patent · US Active

System and method for acquiring electrical impedance tomography data

US12419533B2 · kind B2 · utility

0Cited by
0References
13Claims
0Family size

Inventor

Key dates

Filing dateMay 20, 2020
Grant dateSep 23, 2025
Priority date—
Expiry dateJan 21, 2043

Classification

  • Technology area (CPC A)Human Necessities
  • CPC primaryA61B2562/046
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

An AC current of multiple frequencies is setup in a body to be sensed, and amplitudes and phases of AC voltages at many electrodes attached to the body are detected simultaneously. At electrode measurement circuits, each of multiple modulating signals is mixed separately with the electrode signal using non-linear circuit components such as transistors or diodes. The output of this mixed signal is stored as a charge, in a capacitor or a semiconductor device (e.g. a CMOS transistor) that can store charge when in a certain state. Upon assertion of a readout signal, the charge is converted back into voltage and sent out on an analog voltage output line from which it is read using ADCs.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.