Patents by Inventor Juha Petri Virtanen

Juha Petri Virtanen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Artifact removal from an electric signal
    Patent number: 7038601
    Abstract: The invention relates to a method and apparatus for suppressing interference in an electric signal, particularly for suppressing interference in an electrocardiogram (ECG) signal in connection with magnetic resonance imaging (MRI). In order to improve the accuracy of the suppression, the electric signal is first sampled at a high sampling frequency, whereby a first sequence of samples is obtained. Some of the samples in the first sequence of samples are then selected on the basis of predetermined criteria. The first sequence is then downsampled using the selected samples, whereby a second sequence of samples is obtained. The second sequence forms a digital presentation of the electric signal in which the interference is suppressed.
    Type: Grant
    Filed: November 26, 2003
    Date of Patent: May 2, 2006
    Assignee: Instrumentatium Corp.
    Inventors: Kimmo Henrik Uutela, Tor Börje Rantala, Juha Petri Virtanen
  • Artifact removal from an electric signal
    Publication number: 20040135571
    Abstract: The invention relates to a method and apparatus for suppressing interference in an electric signal, particularly for suppressing interference in an electrocardiogram (ECG) signal in connection with magnetic resonance imaging (MRI). In order to improve the accuracy of the suppression, the electric signal is first sampled at a high sampling frequency, whereby a first sequence of samples is obtained. Some of the samples in the first sequence of samples are then selected on the basis of predetermined criteria. The first sequence is then downsampled using the selected samples, whereby a second sequence of samples is obtained. The second sequence forms a digital presentation of the electric signal in which the interference is suppressed.
    Type: Application
    Filed: November 26, 2003
    Publication date: July 15, 2004
    Inventors: Kimmo Henrik Uutela, Tor Borje Rantala, Juha Petri Virtanen