The Experts below are selected from a list of 75 Experts worldwide ranked by ideXlab platform

Bradford J Wood - One of the best experts on this subject based on the ideXlab platform.

  • Original Articles PERCUTANEOUS RADIO FREQUENCY ABLATION OF SMALL RENAL TUMORS: INITIAL RESULTS
    2020
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, W Marston, Bradford J Wood
    Abstract:

    ABSTRACT Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors. Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later. Results Conclusions: Percutaneous radio frequency ablation of small renal tumor is well tolerated and minimally invasive. It will remain experimental until procedural and imaging parameters that correlate with tumor destruction are validated

  • percutaneous radio frequency ablation of small renal tumors initial results
    The Journal of Urology, 2002
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, Marston W Linehan, Bradford J Wood
    Abstract:

    Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors.Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later.Results: A total of 24 ablations were performed in 21 patients with renal tumor, including solid von Hippel-Lindau clear cell tumor in 19 and hereditary papillary renal cancer...

Christian P Pavlovich - One of the best experts on this subject based on the ideXlab platform.

  • Original Articles PERCUTANEOUS RADIO FREQUENCY ABLATION OF SMALL RENAL TUMORS: INITIAL RESULTS
    2020
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, W Marston, Bradford J Wood
    Abstract:

    ABSTRACT Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors. Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later. Results Conclusions: Percutaneous radio frequency ablation of small renal tumor is well tolerated and minimally invasive. It will remain experimental until procedural and imaging parameters that correlate with tumor destruction are validated

  • percutaneous radio frequency ablation of small renal tumors initial results
    The Journal of Urology, 2002
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, Marston W Linehan, Bradford J Wood
    Abstract:

    Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors.Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later.Results: A total of 24 ablations were performed in 21 patients with renal tumor, including solid von Hippel-Lindau clear cell tumor in 19 and hereditary papillary renal cancer...

Dragan Maksimovic - One of the best experts on this subject based on the ideXlab platform.

  • Fast Tracking Electrosurgical Generator Using Two-Rail Multiphase Buck Converter With GaN Switches
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Scott Jensen, Dragan Maksimovic
    Abstract:

    Electrosurgery involves the use of high-frequency (typically 100-500 kHz) alternating current to elicit a clinical response in tissue (e.g., cutting or cauterization) using a plasma arc. Standard Electrosurgical Generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This paper describes a fast tracking ESG capable of shaping the output ac waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications. The proposed fast tracking ESG is based on a two-rail multiphase buck topology using GaN switches. Experimental results are given for a four-phase ESG prototype operating from ±250 V with 2-MHz per-phase switching frequency, capable of providing up to 50 W to an arc modeled as a 300-4000 Ω load.

  • Fast tracking Electrosurgical Generator using GaN switches
    2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015
    Co-Authors: Scott Jensen, Dragan Maksimovic, Daniel Friedrichs, James Gilbert
    Abstract:

    Electrosurgery involves the use of high-frequency (typically 100-500 kHz) alternating current (AC) to elicit a clinical response in tissue (e.g., cutting or cauterization) using a plasma arc. Standard Electrosurgical Generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This paper describes a fast tracking ESG capable of shaping the output AC waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications. The proposed fast tracking ESG is based on a two-rail multi-phase buck topology using GaN switches. Experimental results are given for a 4-phase ESG prototype operating from ±250 V with 2 MHz per-phase switching frequency, capable of providing up to 50 W to an arc modeled as a 180 Ω to 3600 Ω load.

Scott Jensen - One of the best experts on this subject based on the ideXlab platform.

  • Fast Tracking Electrosurgical Generator Using Two-Rail Multiphase Buck Converter With GaN Switches
    IEEE Transactions on Power Electronics, 2017
    Co-Authors: Scott Jensen, Dragan Maksimovic
    Abstract:

    Electrosurgery involves the use of high-frequency (typically 100-500 kHz) alternating current to elicit a clinical response in tissue (e.g., cutting or cauterization) using a plasma arc. Standard Electrosurgical Generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This paper describes a fast tracking ESG capable of shaping the output ac waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications. The proposed fast tracking ESG is based on a two-rail multiphase buck topology using GaN switches. Experimental results are given for a four-phase ESG prototype operating from ±250 V with 2-MHz per-phase switching frequency, capable of providing up to 50 W to an arc modeled as a 300-4000 Ω load.

  • Fast tracking Electrosurgical Generator using GaN switches
    2015 IEEE Applied Power Electronics Conference and Exposition (APEC), 2015
    Co-Authors: Scott Jensen, Dragan Maksimovic, Daniel Friedrichs, James Gilbert
    Abstract:

    Electrosurgery involves the use of high-frequency (typically 100-500 kHz) alternating current (AC) to elicit a clinical response in tissue (e.g., cutting or cauterization) using a plasma arc. Standard Electrosurgical Generators (ESGs) are based on resonant inverters, which constrain the output frequency and waveshape. This paper describes a fast tracking ESG capable of shaping the output AC waveform over a range of frequencies, thus providing improved flexibility and control in electrosurgery applications. The proposed fast tracking ESG is based on a two-rail multi-phase buck topology using GaN switches. Experimental results are given for a 4-phase ESG prototype operating from ±250 V with 2 MHz per-phase switching frequency, capable of providing up to 50 W to an arc modeled as a 180 Ω to 3600 Ω load.

M. C Clellan M. Walther - One of the best experts on this subject based on the ideXlab platform.

  • Original Articles PERCUTANEOUS RADIO FREQUENCY ABLATION OF SMALL RENAL TUMORS: INITIAL RESULTS
    2020
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, W Marston, Bradford J Wood
    Abstract:

    ABSTRACT Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors. Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later. Results Conclusions: Percutaneous radio frequency ablation of small renal tumor is well tolerated and minimally invasive. It will remain experimental until procedural and imaging parameters that correlate with tumor destruction are validated

  • percutaneous radio frequency ablation of small renal tumors initial results
    The Journal of Urology, 2002
    Co-Authors: Christian P Pavlovich, M. C Clellan M. Walther, Peter L. Choyke, Stephen E Pautler, Richard Chang, Marston W Linehan, Bradford J Wood
    Abstract:

    Purpose: Thermal tissue ablation with radio frequency energy is an experimental treatment of renal tumor. We report early results of an ongoing trial of percutaneous radio frequency ablation for small renal tumors.Materials and Methods: Patients with percutaneously accessible renal tumors were evaluated for radio frequency ablation. Tumors were solid on computerized tomography (CT), 3 cm. or less in diameter and enlarging during at least 1 year. Ablation was performed at the Interventional Radiology suite under ultrasound and/or CT guidance. A 50 W., 460 kHz. Electrosurgical Generator delivered radio frequency energy via a percutaneously placed 15 gauge coaxial probe. At least 2, 10 to 12-minute ablation cycles were applied to each lesion. Patients were observed overnight before discharge from hospital and reevaluated 2 months later.Results: A total of 24 ablations were performed in 21 patients with renal tumor, including solid von Hippel-Lindau clear cell tumor in 19 and hereditary papillary renal cancer...