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Guillem
Guillem Pratx, Stanford, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20100108894 | METHOD AND APPARATUS FOR IMAGING USING ROBUST BAYESIAN SEQUENCE RECONSTRUCTION - Methods and systems for determining a sequence of energy interactions in a detector. A plurality of discrete energy interactions is received in a plurality of detector voxels. A plurality of possible sequences of interaction is formed based on the received plurality of discrete energy interactions. For each of the plurality of possible sequences of interaction, an a posteriori probability is computed, where the a posteriori probability is based on a likelihood that the possible sequence of interaction is consistent with the received plurality of discrete energy interactions. Additionally or alternatively, the a posteriori probability may be based on an a priori probability. One of the formed plurality of possible sequences of interaction is selected based on the computed a posteriori probability. | 05-06-2010 |
Guillem Pratx, Mountain View, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20110182491 | Shift-Varing Line Projection using graphics hardware - 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. | 07-28-2011 |
| 20110251484 | Molecular imaging using radioluminescent nanoparticles - Molecular imaging of radioluminescent nanoparticle probes injected into biological tissue is performed by irradiated the tissue with ionizing radiation to induce radioluminescence at optical wavelengths, preferably at predetermined near infrared wavelengths. The optical light is detected and processed to determine a spatial distribution of the probes. The radioluminescent nanoparticles may be inorganic or organic phosphors, scintillators, or quantum dots. Imaging systems realizing this technique include tomographic systems using an x-ray beam to sequentially irradiate selected regions, systems with a radioactive source producing the ionizing radiation from outside the tissue, such as with a beam, or inside the tissue, such as with an endoscope or injected radiopharmaceutical. The optical signals may be detected by a photodetector array external to the tissue, a photodetector integrated with an endoscope or mammographic paddle, integrated into a capsule endoscope, or an array positioned near the biological tissue. | 10-13-2011 |
Guillem Pratx, Moutain View, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20110250128 | Method for tissue characterization based on beta radiation and coincident Cherenkov radiation of a radiotracer - A method of characterizing a tissue sample is provided that includes injecting a tissue sample with radiotracers, where the radiotracers include beta-emitter radio tracers, the beta-emitter radio tracers emit beta particles according to a decay of the beta-emitter radio tracers, and measuring the beta particles or Cherenkov radiation from the beta particles in the tissue sample, and determining a condition of the radio tracers in the tissue sample according to the measured beta particles or the measured Cherenkov radiation, where the determined condition includes a depth and/or a concentration of the radiotracers in the tissue sample. | 10-13-2011 |
Guillem Serra Autonell, Taradell (barcelona) ES
| Patent application number | Description | Published |
|---|---|---|
| 20100016747 | METHOD FOR PROCESSING CARDIOELECTRIC SIGNALS AND CORRESPONDING DEVICE - Method for processing cardioelectric signals and corresponding device. The method enables processing previously sampled cardioelectric signals so as to filter the T wave, thereby improving the visualization of the P wave. The method comprises the following stages: | 01-21-2010 |