Patents by Inventor Sven P. Prevrhal

Sven P. Prevrhal 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).

  • Shift-varying line projection using graphics hardware
    Patent number: 9111381
    Abstract: Line segments are classified according to orientation to improve list mode reconstruction of tomography data using graphics processing units (GPUs). The new approach addresses challenges which include compute thread divergence and random memory access by exploiting GPU capabilities such as shared memory and atomic operations. The benefits of the GPU implementation are compared with a reference CPU-based code. When applied to positron emission tomography (PET) image reconstruction, the GPU implementation is 43× faster, and images are virtually identical. In particular, the deviation between the GPU and the CPU implementation is less than 0.08% (RMS) after five iterations of the reconstruction algorithm, which is of negligible consequence in typical clinical applications.
    Type: Grant
    Filed: January 27, 2011
    Date of Patent: August 18, 2015
    Assignee: Koninklijke Philips N.V.
    Inventors: Craig S. Levin, Guillem Pratx, Jingyu Cui, Sven P. Prevrhal
  • Shift-Varing Line Projection using graphics hardware
    Publication number: 20110182491
    Abstract: Line segments are classified according to orientation to improve list mode reconstruction of tomography data using graphics processing units (GPUs). The new approach addresses challenges which include compute thread divergence and random memory access by exploiting GPU capabilities such as shared memory and atomic operations. The benefits of the GPU implementation are compared with a reference CPU-based code. When applied to positron emission tomography (PET) image reconstruction, the GPU implementation is 43× faster, and images are virtually identical. In particular, the deviation between the GPU and the CPU implementation is less than 0.08% (RMS) after five iterations of the reconstruction algorithm, which is of negligible consequence in typical clinical applications.
    Type: Application
    Filed: January 27, 2011
    Publication date: July 28, 2011
    Inventors: Craig S. Levin, Guillem Pratx, Jingyu Cul, Sven P. Prevrhal