Isaac Chang

Summary

Affiliation: Food and Drug Administration
Country: USA

Publications

  1. ncbi Precision test apparatus for evaluating the heating pattern of radiofrequency ablation devices
    I Chang
    US Food and Drug Administration, 12725 Twinbrook Parkway HFZ 133, Rockville, MD 20852, USA
    Med Eng Phys 24:633-40. 2002
  2. ncbi Finite element analysis of hepatic radiofrequency ablation probes using temperature-dependent electrical conductivity
    Isaac Chang
    Office of Science and Technology, Center for Devices and Radiological Health, U S Food and Drug Administration, Rockville, MD, USA
    Biomed Eng Online 2:12. 2003
  3. ncbi Effects of perfusion on radiofrequency ablation in swine kidneys
    Isaac Chang
    Center for Devices and Radiological Health, Office of Science and Technology, U S Food and Drug Administration, 12725 Twinbrook Pkwy, HFZ 133, Rockville, MD 20852, USA
    Radiology 231:500-5. 2004
  4. ncbi Thermal modeling of lesion growth with radiofrequency ablation devices
    Isaac A Chang
    Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U S Food and Drug Administration, Rockville, Maryland, USA
    Biomed Eng Online 3:27. 2004
  5. ncbi Optical-thermal characterization of cutaneous transilluminators
    T Joshua Pfefer
    Center for Devices and Radiological Health, Food and Drug Administration, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
    Phys Med Biol 54:6867-80. 2009
  6. ncbi An alternative method for determination of low-frequency specific absorption rate patterns in homogeneous phantoms
    Brian B Beard
    Food and Drug Administration, Center for Devices and Radiological Health, Electrophysics Branch, HFZ 133, 9200 Corporate Boulevard, Rockville, MD 20850, USA
    Phys Med Biol 48:2013-22. 2003
  7. ncbi Numerical evaluation of heating of the human head due to magnetic resonance imaging
    Uyen D Nguyen
    Department of Biomedical Engineering, Catholic University of America, Washington, DC 20064, USA
    IEEE Trans Biomed Eng 51:1301-9. 2004

Detail Information

Publications7

  1. ncbi Precision test apparatus for evaluating the heating pattern of radiofrequency ablation devices
    I Chang
    US Food and Drug Administration, 12725 Twinbrook Parkway HFZ 133, Rockville, MD 20852, USA
    Med Eng Phys 24:633-40. 2002
    ..Thus, it is ideally suited for studying a variety of complex ablation problems involving multiple tissues types and complex blood flow geometries...
  2. ncbi Finite element analysis of hepatic radiofrequency ablation probes using temperature-dependent electrical conductivity
    Isaac Chang
    Office of Science and Technology, Center for Devices and Radiological Health, U S Food and Drug Administration, Rockville, MD, USA
    Biomed Eng Online 2:12. 2003
    ..While it is widely acknowledged that accounting for temperature dependent phenomena may affect the outcome of these models, the effect has not been assessed...
  3. ncbi Effects of perfusion on radiofrequency ablation in swine kidneys
    Isaac Chang
    Center for Devices and Radiological Health, Office of Science and Technology, U S Food and Drug Administration, 12725 Twinbrook Pkwy, HFZ 133, Rockville, MD 20852, USA
    Radiology 231:500-5. 2004
    ..To evaluate the effect of vascular occlusion on the size of radiofrequency (RF) ablation lesions and to evaluate embolization as an occlusion method...
  4. ncbi Thermal modeling of lesion growth with radiofrequency ablation devices
    Isaac A Chang
    Office of Science and Engineering Laboratories, Center for Devices and Radiological Health, U S Food and Drug Administration, Rockville, Maryland, USA
    Biomed Eng Online 3:27. 2004
    ..Although many studies have been conducted to characterize the relationship between time-temperature exposure of tissue heating to cell damage, to date these relationships have not been employed in a finite element model...
  5. ncbi Optical-thermal characterization of cutaneous transilluminators
    T Joshua Pfefer
    Center for Devices and Radiological Health, Food and Drug Administration, 10903 New Hampshire Ave, Silver Spring, MD, 20993, USA
    Phys Med Biol 54:6867-80. 2009
    ..This study highlights the potential risk of LED-based medical devices as well as the need for additional research on related issues such as neonatal thermal injury thresholds...
  6. ncbi An alternative method for determination of low-frequency specific absorption rate patterns in homogeneous phantoms
    Brian B Beard
    Food and Drug Administration, Center for Devices and Radiological Health, Electrophysics Branch, HFZ 133, 9200 Corporate Boulevard, Rockville, MD 20850, USA
    Phys Med Biol 48:2013-22. 2003
    ..When the results of the voltage gradient method were scaled to the same power level used for the thermal SAR, the agreement was compatible with typical thermal SAR accuracy...
  7. ncbi Numerical evaluation of heating of the human head due to magnetic resonance imaging
    Uyen D Nguyen
    Department of Biomedical Engineering, Catholic University of America, Washington, DC 20064, USA
    IEEE Trans Biomed Eng 51:1301-9. 2004
    ..The model was validated both experimentally and analytically. The experimental validation was performed at the MR test facility located at the Food and Drug Administration's Center for Devices and Radiological Health...