P C Li

Summary

Affiliation: National Taiwan University
Country: Taiwan

Publications

  1. ncbi request reprint An efficient speckle tracking algorithm for ultrasonic imaging
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, ROC
    Ultrason Imaging 24:215-28. 2002
  2. ncbi request reprint Pulse compression for finite amplitude distortion based harmonic imaging using coded waveforms
    P C Li
    Department of Electrical Engineering, National Taiwan University, Taipei, R O C
    Ultrason Imaging 21:1-16. 1999
  3. ncbi request reprint Time-intensity-based volumetric flow measurements: an in vitro study
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrasound Med Biol 28:349-58. 2002
  4. ncbi request reprint Tissue motion and elevational speckle decorrelation in freehand 3D ultrasound
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Tapei, ROC
    Ultrason Imaging 24:1-12. 2002
  5. ncbi request reprint Transfer function analysis of ultrasonic time-intensity measurements
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrasound Med Biol 29:1493-500. 2003
  6. ncbi request reprint Photoacoustic flow measurements by use of laser-induced shape transitions of gold nanorods
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Opt Lett 30:3341-3. 2005
  7. ncbi request reprint Waveform design for ultrasonic pulse-inversion fundamental imaging
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrason Imaging 28:129-43. 2006
  8. ncbi request reprint Subband photoacoustic imaging for contrast improvement
    Pai Chi Li
    Graduate Institute of Biomedical Electronics and Bioinformatics, Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Opt Express 16:20215-26. 2008
  9. ncbi request reprint In vivo photoacoustic molecular imaging with simultaneous multiple selective targeting using antibody-conjugated gold nanorods
    Pai Chi Li
    Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
    Opt Express 16:18605-15. 2008
  10. ncbi request reprint Strain compounding: a new approach for speckle reduction
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, ROC
    IEEE Trans Ultrason Ferroelectr Freq Control 49:39-46. 2002

Collaborators

Detail Information

Publications23

  1. ncbi request reprint An efficient speckle tracking algorithm for ultrasonic imaging
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, ROC
    Ultrason Imaging 24:215-28. 2002
    ....
  2. ncbi request reprint Pulse compression for finite amplitude distortion based harmonic imaging using coded waveforms
    P C Li
    Department of Electrical Engineering, National Taiwan University, Taipei, R O C
    Ultrason Imaging 21:1-16. 1999
    ..In this paper, simulation examples of SNR improvements by up to 8.2 dB are shown and the efficacy of the compression schemes is studied. Potential sources of performance degradation are also discussed...
  3. ncbi request reprint Time-intensity-based volumetric flow measurements: an in vitro study
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrasound Med Biol 28:349-58. 2002
    ..Potential applications of new volumetric flow estimation techniques based on both input and output intensities were also discussed...
  4. ncbi request reprint Tissue motion and elevational speckle decorrelation in freehand 3D ultrasound
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Tapei, ROC
    Ultrason Imaging 24:1-12. 2002
    ..Finally, full motion analysis in freehand scanning may not be possible by only using speckle correlation analysis unless speckle variations can be reduced and the correlation distribution under complex motion can be obtained...
  5. ncbi request reprint Transfer function analysis of ultrasonic time-intensity measurements
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrasound Med Biol 29:1493-500. 2003
    ..The results from this paper lead to future work in brain-perfusion estimation based on extracranial time-intensity measurements...
  6. ncbi request reprint Photoacoustic flow measurements by use of laser-induced shape transitions of gold nanorods
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Opt Lett 30:3341-3. 2005
    ..Excellent agreement between the measured velocities and the actual velocities was demonstrated, with a linear regression correlation coefficient of 0.93. This study is a pioneer work on wash-in flow estimation in photoacoustic imaging...
  7. ncbi request reprint Waveform design for ultrasonic pulse-inversion fundamental imaging
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Ultrason Imaging 28:129-43. 2006
    ..Therefore, a Gaussian pulse with the pulse length determined by the signal-to-noise ratio of the imaging system is generally optimal for PI fundamental imaging...
  8. ncbi request reprint Subband photoacoustic imaging for contrast improvement
    Pai Chi Li
    Graduate Institute of Biomedical Electronics and Bioinformatics, Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Opt Express 16:20215-26. 2008
    ..Finally, a method to further enhance the contrast based on optimal weighting is also presented. The proposed method is of particular interest in photoacoustic molecular imaging...
  9. ncbi request reprint In vivo photoacoustic molecular imaging with simultaneous multiple selective targeting using antibody-conjugated gold nanorods
    Pai Chi Li
    Graduate Institute of Biomedical Electronics and Bioinformatics, National Taiwan University, Taipei, Taiwan
    Opt Express 16:18605-15. 2008
    ..Both in vitro and in vivo mouse model imaging experiments were performed, with contrast enhancement of up to 10 dB and 3.5 dB, respectively. The potential in improving cancer diagnosis is demonstrated...
  10. ncbi request reprint Strain compounding: a new approach for speckle reduction
    Pai Chi Li
    Department of Electrical Engineering, National Taiwan University, Taipei, ROC
    IEEE Trans Ultrason Ferroelectr Freq Control 49:39-46. 2002
    ..Performance limitations and fundamental differences between the proposed technique and existing techniques are discussed...
  11. ncbi request reprint Strain compounding: spatial resolution and performance on human images
    P C Li
    Department of Electrical Engineering, National Taiwan University, No 1, Sec 4, Roosevelt Road, Taipei 106, Taiwan
    Ultrasound Med Biol 27:1535-41. 2001
    ..Speckle reduction in liver imaging is also demonstrated. However, speckle reduction is not as significant as in thyroid imaging, due to the fact that a large compression cannot be achieved...
  12. ncbi request reprint Effects of transmit focusing on finite amplitude distortion based second harmonic generation
    P C Li
    Department of Electrical Engineering, National Taiwan University, Taipei, ROC
    Ultrason Imaging 21:243-58. 1999
    ..In other words, it is expected that dynamic transmit focusing can improve the SNR of finite amplitude distortion based second harmonic imaging while improving the contrast resolution over fundamental imaging...
  13. ncbi request reprint On velocity estimation using speckle decorrelation
    P C Li
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan, R O C
    IEEE Trans Ultrason Ferroelectr Freq Control 48:1084-91. 2001
    ..It is further shown that effects of signal-to-noise ratio (SNR) on the correlation must also be taken into account for quantitative flow analysis...
  14. ncbi request reprint A dynamic focusing technique for delta-sigma-based beamformers
    P C Li
    Department of Electrical Engineering, National Taiwan University, Tapei, ROC
    Ultrason Imaging 22:197-205. 2000
    ....
  15. ncbi request reprint Correlation-based correction of sound velocity inhomogeneities using delta-sigma modulators
    P C Li
    Department of Electrical Engineering, National Taiwan University, Tapei, ROC
    Ultrason Imaging 22:206-13. 2000
    ..It is shown that the single bit dynamic focusing approach does not affect the overall performance of phase aberration correction...
  16. ncbi request reprint Aperture-domain processing and its applications in ultrasound imaging: a review
    S L Wang
    Department of Electrical Engineering, National Taiwan University, Taipei, People s Republic of China
    Proc Inst Mech Eng H 224:143-54. 2010
    ..18 per cent and 18.11 per cent in the axial and lateral velocity components, respectively. Other applications in which aperture-domain data can be used are also discussed...
  17. ncbi request reprint Feasibility study of time-intensity-based blood flow measurements using deconvolution
    C K Yeh
    Department of Electrical Engineering, National Taiwan University, Taipei, ROC
    Ultrason Imaging 23:90-105. 2001
    ..Nonetheless, the indicator-dilution theory can still be applied if only relative measurements of the flow rate are required...
  18. ncbi request reprint Filter-based synthetic transmit and receive focusing
    M L Li
    Department of Electrical Engineering, National Taiwan University, Tapei, ROC
    Ultrason Imaging 23:73-89. 2001
    ..Nonetheless, system complexity is greatly reduced with synthetic transmit and receive focusing because the dynamic receive focusing circuit is no longer needed...
  19. ncbi request reprint Harmonic leakage and image quality degradation in tissue harmonic imaging
    C C Shen
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    IEEE Trans Ultrason Ferroelectr Freq Control 48:728-36. 2001
    ..The filtering technique was also compared with the pulse inversion technique. It was shown that the pulse inversion technique effectively suppresses harmonic leakage at the cost of imaging frame rate and potential motion artifacts...
  20. ncbi request reprint Optoacoustic imaging with synthetic aperture focusing and coherence weighting
    C K Liao
    Department of Electrical Engineering, National Taiwan University, Taipei, Taiwan
    Opt Lett 29:2506-8. 2004
    ..The results show that the proposed technique improved lateral resolution by 400-800% and the signal-to-noise ratio by 7-23 dB over conventional techniques...
  21. ncbi request reprint Elastic properties of tendon measured by two different approaches
    P L Kuo
    Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan
    Ultrasound Med Biol 27:1275-84. 2001
    ..However, a significant discrepancy existed between the two approaches. The discrepancy was primarily due to viscoelasticity associated with the first approach...
  22. ncbi request reprint Tissue harmonic image analysis based on spatial covariance
    C C Shen
    Department of Electrical Engineering, National Taiwan University, Taipei, ROC
    IEEE Trans Ultrason Ferroelectr Freq Control 48:1648-56. 2001
    ..It is concluded that the linear signal is more suitable for correlation-based correction of sound velocity inhomogeneities, despite the fact that tissue harmonic imaging generally has improved image quality over linear imaging...
  23. doi request reprint Intracavernosal pressure characteristics analyzed by power spectral density for identifying the phase of penile erection
    W R Han
    Institute of Biomedical Engineering, National Yang Ming University, Taipei, Taiwan
    Int J Impot Res 21:336-42. 2009
    ..75. The described novel objective and low-invasiveness method can therefore be used for identifying the full and rigid erection phases of the penis in urological investigations during different erection phases...