Guillem Pratx

Summary

Affiliation: Stanford University
Country: USA

Publications

  1. pmc Radioluminescence microscopy: measuring the heterogeneous uptake of radiotracers in single living cells
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California, USA
    PLoS ONE 7:e46285. 2012
  2. pmc Monte Carlo simulation of photon migration in a cloud computing environment with MapReduce
    Guillem Pratx
    Stanford University School of Medicine, Department of Radiation Oncology, 875 Blake Wilbur Drive, Stanford, California 94305, USA
    J Biomed Opt 16:125003. 2011
  3. ncbi request reprint GPU computing in medical physics: a review
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, 875 Blake Wilbur Drive, Stanford, California 94305, USA
    Med Phys 38:2685-97. 2011
  4. doi request reprint X-ray luminescence computed tomography via selective excitation: a feasibility study
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 29:1992-9. 2010
  5. doi request reprint First demonstration of multiplexed X-ray fluorescence computed tomography (XFCT) imaging
    Yu Kuang
    Radiation Oncology Department, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 32:262-7. 2013
  6. doi request reprint Intraoperative imaging of tumors using Cerenkov luminescence endoscopy: a feasibility experimental study
    Hongguang Liu
    Molecular Imaging Program at Stanford MIPS, Department of Radiology and Bio X Program, Canary Center at Stanford for Cancer Early Detection, Stanford University, Stanford, California 94305, USA
    J Nucl Med 53:1579-84. 2012
  7. pmc Radioluminescent nanophosphors enable multiplexed small-animal imaging
    Colin M Carpenter
    Department of Radiation Oncology, School of Medicine, Stanford University, Stanford, CA 94305, USA
    Opt Express 20:11598-604. 2012
  8. pmc Fast, accurate and shift-varying line projections for iterative reconstruction using the GPU
    Guillem Pratx
    Department of Radiology, Molecular Imaging Program, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 28:435-45. 2009
  9. pmc Toward real-time Monte Carlo simulation using a commercial cloud computing infrastructure
    Henry Wang
    Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
    Phys Med Biol 56:N175-81. 2011
  10. pmc Effects of multiple-interaction photon events in a high-resolution PET system that uses 3-D positioning detectors
    Yi Gu
    Department of Electrical Engineering, Molecular Imaging Instrumentation Laboratory, Stanford University, Stanford, California 94305, USA
    Med Phys 37:5494-508. 2010

Collaborators

Detail Information

Publications21

  1. pmc Radioluminescence microscopy: measuring the heterogeneous uptake of radiotracers in single living cells
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California, USA
    PLoS ONE 7:e46285. 2012
    ..Together, these results indicate that radioluminescence microscopy can visualize radiotracer uptake with single-cell resolution, which may find a use in the precise characterization of radiotracers...
  2. pmc Monte Carlo simulation of photon migration in a cloud computing environment with MapReduce
    Guillem Pratx
    Stanford University School of Medicine, Department of Radiation Oncology, 875 Blake Wilbur Drive, Stanford, California 94305, USA
    J Biomed Opt 16:125003. 2011
    ..The distributed simulation produced the same output as the original implementation and was resilient to hardware failure: the correctness of the simulation was unaffected by the shutdown of 50% of the nodes...
  3. ncbi request reprint GPU computing in medical physics: a review
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, 875 Blake Wilbur Drive, Stanford, California 94305, USA
    Med Phys 38:2685-97. 2011
    ....
  4. doi request reprint X-ray luminescence computed tomography via selective excitation: a feasibility study
    Guillem Pratx
    Department of Radiation Oncology, Stanford University School of Medicine, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 29:1992-9. 2010
    ..The molecular and anatomical images are spatially and temporally co-registered, and, if a single-pixel X-ray detector is used, they have matching spatial resolution...
  5. doi request reprint First demonstration of multiplexed X-ray fluorescence computed tomography (XFCT) imaging
    Yu Kuang
    Radiation Oncology Department, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 32:262-7. 2013
    ..In conclusion, XFCT is a promising modality for multiplexed imaging of high atomic number probes...
  6. doi request reprint Intraoperative imaging of tumors using Cerenkov luminescence endoscopy: a feasibility experimental study
    Hongguang Liu
    Molecular Imaging Program at Stanford MIPS, Department of Radiology and Bio X Program, Canary Center at Stanford for Cancer Early Detection, Stanford University, Stanford, California 94305, USA
    J Nucl Med 53:1579-84. 2012
    ..We developed a prototype customized fiberscopic Cerenkov imaging system to investigate the potential in guiding minimally invasive surgical resection...
  7. pmc Radioluminescent nanophosphors enable multiplexed small-animal imaging
    Colin M Carpenter
    Department of Radiation Oncology, School of Medicine, Stanford University, Stanford, CA 94305, USA
    Opt Express 20:11598-604. 2012
    ..Combined with the high-resolution potential of low-scattering X-ray excitation, this imaging technique may be a promising method to probe molecular processes in living organisms...
  8. pmc Fast, accurate and shift-varying line projections for iterative reconstruction using the GPU
    Guillem Pratx
    Department of Radiology, Molecular Imaging Program, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 28:435-45. 2009
    ..A quantitative evaluation is included to validate the correctness of this new approach...
  9. pmc Toward real-time Monte Carlo simulation using a commercial cloud computing infrastructure
    Henry Wang
    Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
    Phys Med Biol 56:N175-81. 2011
    ..In addition to the significant speed up, cloud computing builds a layer of abstraction for high performance parallel computing, which may change the way dose calculations are performed and radiation treatment plans are completed...
  10. pmc Effects of multiple-interaction photon events in a high-resolution PET system that uses 3-D positioning detectors
    Yi Gu
    Department of Electrical Engineering, Molecular Imaging Instrumentation Laboratory, Stanford University, Stanford, California 94305, USA
    Med Phys 37:5494-508. 2010
    ..In this article, the authors investigate how MIPEs impact the system photon sensitivity, the data acquisition scheme, and the quality and quantitative accuracy of reconstructed PET images...
  11. doi request reprint Tomographic molecular imaging of x-ray-excitable nanoparticles
    Guillem Pratx
    Stanford University School of Medicine, Department of Radiation Oncology, 875 Blake Wilbur Drive, Stanford, California 94305 5847, USA
    Opt Lett 35:3345-7. 2010
    ..Imaging in an optically diffusive medium shows that imaging performance is not affected by optical scatter; furthermore, the linear response of the reconstructed images suggests that XLCT is capable of quantitative imaging...
  12. pmc Development of XFCT imaging strategy for monitoring the spatial distribution of platinum-based chemodrugs: Instrumentation and phantom validation
    Yu Kuang
    Department of Radiation Oncology and Molecular Imaging Program at Stanford MIPS, Stanford University School of Medicine, Stanford, California 94305 5847 and Medical Physics Program, University of Nevada, Las Vegas, Nevada 89154 3037
    Med Phys 40:030701. 2013
    ..Conclusions: XFCT is a promising modality for monitoring the spatial distribution of Pt drugs. The technique may be useful in tailoring tumor treatment regimen in the future...
  13. pmc Convex optimization of coincidence time resolution for a high-resolution PET system
    Paul D Reynolds
    Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 30:391-400. 2011
    ..3 ±0.07 ns full-width at half-maximum (FWHM) to 6.92 ±0.02 ns FWHM ( 11.52 ±0.05 ns to 4.89 ±0.02 ns for unpaired photons)...
  14. doi request reprint Investigation of X-ray fluorescence computed tomography (XFCT) and K-edge imaging
    Magdalena Bazalova
    Radiation Oncology Department, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 31:1620-7. 2012
    ..Contrast-to-noise ratio (CNR) of XFCT images of the simulated acrylic phantoms was higher than that of transmission K-edge images for contrast concentrations below 0.4%...
  15. pmc Ultrafast and scalable cone-beam CT reconstruction using MapReduce in a cloud computing environment
    Bowen Meng
    Department of Electrical Engineering, Stanford University, California 94305, USA
    Med Phys 38:6603-9. 2011
    ..We show the utility of MapReduce for solving large-scale medical physics problems in a cloud computing environment...
  16. doi request reprint Distributed MLEM: an iterative tomographic image reconstruction algorithm for distributed memory architectures
    Jingyu Cui
    Department of Electrical Engineering, Stanford University, Stanford, CA 94305, USA
    IEEE Trans Med Imaging 32:957-67. 2013
    ..Experiments on a multi-GPU cluster demonstrate the effectiveness of the proposed approach...
  17. pmc X-ray acoustic computed tomography with pulsed x-ray beam from a medical linear accelerator
    Liangzhong Xiang
    Department of Radiation Oncology, School of Medicine, Stanford University, Stanford, California 94305
    Med Phys 40:010701. 2013
    ..Although much work is needed to improve the image quality of XACT and to explore its performance in other irradiation energies, the benefits of this modality, as highlighted in this work, encourage further study...
  18. pmc Bayesian reconstruction of photon interaction sequences for high-resolution PET detectors
    Guillem Pratx
    Molecular Imaging Program at Stanford, Department of Radiology, Stanford, CA, USA
    Phys Med Biol 54:5073-94. 2009
    ..The point-spread function of the system presented lower tails and higher peak value when MAP was used. This translated into improved image quality, which we quantified by studying contrast and spatial resolution gains...
  19. doi request reprint Fully 3D list-mode time-of-flight PET image reconstruction on GPUs using CUDA
    Jing yu Cui
    Department of Electrical Engineering, Stanford University, Stanford, California 94305
    Med Phys 38:6775-86. 2011
    ..However, the massive amount of computation involved in forward projection and backprojection limits the application of list-mode reconstruction in practice, and makes it challenging to incorporate accurate system modeling...
  20. doi request reprint X-ray excitable luminescent polymer dots doped with an iridium(III) complex
    Yasuko Osakada
    Department of Chemistry, Stanford University, Stanford, CA 94305, USA
    Chem Commun (Camb) 49:4319-21. 2013
    ..In this study, cyclometalated iridium(III) complex-doped polymer dots were synthesized and shown to emit luminescence upon X-ray irradiation, potentially serving as a new probe for molecular imaging during X-ray computed tomography...
  21. pmc Online detector response calculations for high-resolution PET image reconstruction
    Guillem Pratx
    Department of Radiation Oncology, Stanford University, Stanford, CA 94305, USA
    Phys Med Biol 56:4023-40. 2011
    ..75 mm hot spheres in air, the variation in reconstructed sphere size was 0.5 mm RMS for the shift-invariant model, compared to 0.07 mm RMS for the shift-varying model...