Patents by Inventor Lucas Carvajal

Lucas Carvajal 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).

  • Publication number: 20070167725
    Abstract: Systems, methods and apparatus are provided through which a compact pod insertable into the rectum for Magnetic Resonance Imaging/Magnetic Resonance Spectroscopy (MRI/MRS) examination of the prostate and containing two receive coils, each connected to transmit blocking and pre-tuned trap circuitry which can be superimposed within the pod in close proximity, can, without either circuit interfering with the other, efficiently gather, for imaging and tissue analysis, radio frequency signals emanating from magnetically disturbed nuclei in prostate tissue.
    Type: Application
    Filed: December 27, 2005
    Publication date: July 19, 2007
    Applicant: General Electric Company
    Inventors: James Tropp, Paul Calderon, Daniel Vigneron, Konstantinos Karpodinis, Lucas Carvajal
  • Patent number: 5212450
    Abstract: An RF resonator mounted on a dielectric support is operated in quadrature at a selected NMR frequency. The resonator consists of four axially distributed high frequency ring current paths on the support and at least four high frequency current paths interconnect each pair of adjacent ring paths. In the preferred embodiment at least sixteen equally spaced parallel segments connect each ring pair and are aligned with one another. The ring segments between the parallel segments together with the parallel segments form loops. At least one discrete capacitor is placed in each outer current loop thereby interrupting the loop. However, this is done so that no inner loop is interrupted by a capacitor. By using quadrature input/output coupling, either inductive or capacitive, a co-rotating mode is excited in the two outer loops through the inner loops providing a highly uniform field across the resonator.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: May 18, 1993
    Assignee: Fox Chase Cancer Center
    Inventors: Joseph Murphy-Boesch, Ravi Srinivasan, Lucas Carvajal