Online source reconstruction for eeg/meg and ecg/mcg

• US 7,840,248 B2
• Filed: 01/27/2004
• Issued: 11/23/2010
• Est. Priority Date: 01/27/2003
• Status: Expired due to Term

• Current Assignee: Compumedics Limited
• Original Assignee: Compumedics Limited
• Inventors: Fuchs, Manfred, Sands, Stephen F.
• Primary Examiner(s): Casler; Brian
• Assistant Examiner(s): RAMIREZ, JOHN FERNANDO
• Application Number:
  US10/765,320
• Publication Number:
  US 20050059874A1
• Time in Patent Office: 2,492 Days
• Field of Search: 600/407, 600/409, 324/307, 324/309
• US Class Current: 600/407
• CPC Class Codes: A61B 5/245 specially adapted for magnetoencephalographic [MEG] signals
• CPC Class Codes: A61B 5/377 using evoked responses
• CPC Class Codes: A61B 5/72 Signal processing specially adapted for physiological signals or for diagnostic purposes character recognition, recognising digital ink, document-oriented image-based pattern recognition G06V30/00; recognition or understanding of postal images G06V30/424

Abstract

In one embodiment, the present invention includes an EEG system comprising of sensors which are utilized to gather an electromagnetic signal from a patient; a signal processing system; and a computer system. The computer system is configured to support multiple threads of execution. The computer system initiates a first thread of execution, a measurement module, where the data is filtered and in some cases averaged. Typically, the data is filtered for a particular latency period. Once the data has been filtered and averaged, the result is given to a second thread of execution, the source reconstruction module, which then proceeds to generate a source reconstruction for the trial. The measurement module then acquires and processes new electromagnetic data from a new trial while the source reconstruction is being performed on the most recent trial.

Claims

1. A method of evaluation comprising:

acquiring an electromagnetic physiological signal with a sensor on a subject;

performing a source reconstruction of the electromagnetic physiological signal via a signal processing circuit in communication with said sensor, with said circuit including a computer system with a processor and a memory, the computer system being configured to support multiple parallel threads of execution with one thread being a measurement module and a second thread being a source reconstruction module;

feeding source reconstruction data through a feedback loop to the measurement module to modify the analysis of a new electromagnetic physiological signal, wherein the new electromagnetic physiological signal is being acquired while the source reconstruction is being performed; and

displaying source reconstruction results overlayed onto anatomical data of said patient.

2. The method of claim 1, wherein the sensor acquires MEG data.

3. The method of claim 1, wherein the sensor acquires EEG data.

4. The method of claim 1, wherein the sensor acquires ECG data.

5. The method of claim 1, wherein the sensor acquires MCG data.