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Patrick Donzeau-gouge - One of the best experts on this subject based on the ideXlab platform.

  • Impact of automated 3-dimensional aortic annular assessment by multidetecter computed tomography in TAVI
    EuroIntervention, 2013
    Co-Authors: Yusuke Watanabe, Erik Bouvier, T Leon, Thomas Hovasse, Mauro Romano, Kentaro Hayashida, Bernard Chevalier, Marie-claude Morice, Thierry Lefevre, Patrick Donzeau-gouge
    Abstract:

    Aims: This study was sought to evaluate the accuracy, reproducibility and predictive value for post-procedural aortic regurgitation (AR) of a novel automated multidetector row computed tomography (MDCT) post-processing imaging software, 3mensio Valves (version 5.1.sp1, Medical Imaging BV, Bilthoven, The Netherlands), in the assessment of patients undergoing transcatheter aortic valve implantation (TAVI). Methods and results: One hundred five patients who underwent screening MDCT before TAVI were evaluated. Aortic annular Measurement and the discrimination value for post-procedural AR were compared between automated 3mensio Valves software and Manual data post-processing software dedicated workstation (EBW; Philips Medical). For aortic annular Measurement, the automated 3mensio Valves software required less image postprocessing time and showed good agreements with Manual MDCT Measurements as demonstrated by Bland-Altman analysis. The automated software had better inter- and intra-observer reproducibility especially for the Measurement of aortic annulus area compared to Manual Measurement (intra-observer intraclass correlation coefficients 0.98 vs. 0.97, inter-observer 0.96 vs. 0.95). In 44 patients after implantation of self-expanding valve, Valve diameter/ the CT-measured geometric mean annulus diameter by automated 3mensio Valves software showed moderate and better discrimination ability in predicting post-procedural AR compared with Manual Measurement (area under the curve 0.77, 95% confidence interval 0.63 to 0.91, p

  • Automated 3-dimensional aortic annular assessment by multidetector computed tomography in transcatheter aortic valve implantation
    JACC: Cardiovascular Interventions, 2013
    Co-Authors: Yusuke Watanabe, Erik Bouvier, Tora Leong, Thomas Hovasse, Mauro Romano, Kentaro Hayashida, Bernard Chevalier, Marie-claude Morice, Thierry Lefevre, Patrick Donzeau-gouge
    Abstract:

    Objectives This study sought to evaluate the accuracy, reproducibility, and predictive value for post-procedural aortic regurgitation (AR) of an automated multidetector computed tomography (MDCT) post-processing imaging software, 3mensio Valves (version 5.1.sp1, 3mensio Medical Imaging BV, the Netherlands), in the assessment of patients undergoing transcatheter aortic valve implantation (TAVI). Background Accurate pre-operative aortic annulus Measurements are crucial for patients undergoing TAVI. Methods One hundred five patients undergoing MDCT screening before TAVI were evaluated. Aortic annular Measurement was compared between automated 3mensio Valves software and Manual data post-processing software on a dedicated workstation; we analyzed the discrimination value of annulus Measurement for post-procedural AR in 44 recipients of a self-expanding valve. Results The automated 3mensio Valves software showed good concordance with Manual MDCT Measurements as demonstrated by Bland-Altman analysis. The automated software provided equally good reproducibility as Manual Measurement, especially for Measurement of aortic annulus area (intraobserver intraclass correlation coefficients 0.98 vs. 0.97, interobserver 0.98 vs. 0.95). In 44 patients after implantation of a self-expanding valve, the valve diameter/CT-measured geometric mean annulus diameter ratio by automated 3mensio Valves software showed moderate and better discrimination ability in predicting post-procedural AR compared with Manual Measurement (p = 0.12, area under the curve 0.77, 95% confidence interval: 0.63 to 0.91, area under the curve 0.68, 95% confidence interval: 0.50 to 0.86, respectively). Conclusions The automated 3mensio Valves software demonstrated reliable, reproducible aortic annulus Measurement and better predictive value for post-procedural AR, suggesting important clinical implications for pre-operative assessment of patients undergoing TAVI. © 2013 by the American College of Cardiology Foundation.

Jan A. Staessen - One of the best experts on this subject based on the ideXlab platform.

  • validation of automated oscillometric versus Manual Measurement of the ankle brachial index
    Hypertension Research, 2009
    Co-Authors: Tom Richart, Barbara Wizner, Jan A. Staessen, Tatiana Kuznetsova, Harry A J Struijkerboudier
    Abstract:

    We validated automated oscillometric Measurement of the ankle-to-arm ratio of systolic blood pressure (ankle–brachial blood pressure index, ABI) against the Manual approach, which requires trained observers and has an intra-observer variability of ∼10%. A single observer measured ABI in 105 subjects (age range, 20–80 years; women, 51.9%). The Manual approach involved the auscultatory Measurement of systolic pressure at the brachial artery and Doppler Measurements of systolic pressure at the anterior and posterior tibial arteries. The automated oscillometric VP-2000 (Omron Healthcare, Kyoto, Japan) was used to measure systolic pressure at the arm and ankle simultaneously. We applied Bland and Altman's methods to study reproducibility. Ankle–brachial blood pressure index averaged (±s.d.) 1.13±0.07 units and 1.12±0.10 units on automated and Manual Measurements, respectively. The absolute and percentage differences (P=0.64) between the two ABI Measurements were 0.005 units (95% confidence interval, −0.015 to 0.024) and 0.60 (−0.69 to 1.04), respectively. The intra-observer variability of repeat ABI Measurements was smaller on automated than on Manual Measurement (0.17 versus −0.84%; P=0.04). Automated ABI Measurement by an oscillometric technique requires little observer training, and significantly increases the reproducibility of ABI estimates compared with the Manual approach.

  • Validation of automated oscillometric versus Manual Measurement of the ankle-brachial index.
    Hypertension Research, 2009
    Co-Authors: Tom Richart, Barbara Wizner, Harry A.j. Struijker-boudier, Tatiana Kuznetsova, Jan A. Staessen
    Abstract:

    Validation of automated oscillometric versus Manual Measurement of the ankle–brachial index

  • Validation of automated oscillometric versus Manual Measurement of the ankle–brachial index
    Hypertension Research, 2009
    Co-Authors: Tom Richart, Barbara Wizner, Harry A.j. Struijker-boudier, Tatiana Kuznetsova, Jan A. Staessen
    Abstract:

    We validated automated oscillometric Measurement of the ankle-to-arm ratio of systolic blood pressure (ankle–brachial blood pressure index, ABI) against the Manual approach, which requires trained observers and has an intra-observer variability of ∼10%. A single observer measured ABI in 105 subjects (age range, 20–80 years; women, 51.9%). The Manual approach involved the auscultatory Measurement of systolic pressure at the brachial artery and Doppler Measurements of systolic pressure at the anterior and posterior tibial arteries. The automated oscillometric VP-2000 (Omron Healthcare, Kyoto, Japan) was used to measure systolic pressure at the arm and ankle simultaneously. We applied Bland and Altman's methods to study reproducibility. Ankle–brachial blood pressure index averaged (±s.d.) 1.13±0.07 units and 1.12±0.10 units on automated and Manual Measurements, respectively. The absolute and percentage differences (P=0.64) between the two ABI Measurements were 0.005 units (95% confidence interval, −0.015 to 0.024) and 0.60 (−0.69 to 1.04), respectively. The intra-observer variability of repeat ABI Measurements was smaller on automated than on Manual Measurement (0.17 versus −0.84%; P=0.04). Automated ABI Measurement by an oscillometric technique requires little observer training, and significantly increases the reproducibility of ABI estimates compared with the Manual approach.

Yusuke Watanabe - One of the best experts on this subject based on the ideXlab platform.

  • Impact of automated 3-dimensional aortic annular assessment by multidetecter computed tomography in TAVI
    EuroIntervention, 2013
    Co-Authors: Yusuke Watanabe, Erik Bouvier, T Leon, Thomas Hovasse, Mauro Romano, Kentaro Hayashida, Bernard Chevalier, Marie-claude Morice, Thierry Lefevre, Patrick Donzeau-gouge
    Abstract:

    Aims: This study was sought to evaluate the accuracy, reproducibility and predictive value for post-procedural aortic regurgitation (AR) of a novel automated multidetector row computed tomography (MDCT) post-processing imaging software, 3mensio Valves (version 5.1.sp1, Medical Imaging BV, Bilthoven, The Netherlands), in the assessment of patients undergoing transcatheter aortic valve implantation (TAVI). Methods and results: One hundred five patients who underwent screening MDCT before TAVI were evaluated. Aortic annular Measurement and the discrimination value for post-procedural AR were compared between automated 3mensio Valves software and Manual data post-processing software dedicated workstation (EBW; Philips Medical). For aortic annular Measurement, the automated 3mensio Valves software required less image postprocessing time and showed good agreements with Manual MDCT Measurements as demonstrated by Bland-Altman analysis. The automated software had better inter- and intra-observer reproducibility especially for the Measurement of aortic annulus area compared to Manual Measurement (intra-observer intraclass correlation coefficients 0.98 vs. 0.97, inter-observer 0.96 vs. 0.95). In 44 patients after implantation of self-expanding valve, Valve diameter/ the CT-measured geometric mean annulus diameter by automated 3mensio Valves software showed moderate and better discrimination ability in predicting post-procedural AR compared with Manual Measurement (area under the curve 0.77, 95% confidence interval 0.63 to 0.91, p

  • Automated 3-dimensional aortic annular assessment by multidetector computed tomography in transcatheter aortic valve implantation
    JACC: Cardiovascular Interventions, 2013
    Co-Authors: Yusuke Watanabe, Erik Bouvier, Tora Leong, Thomas Hovasse, Mauro Romano, Kentaro Hayashida, Bernard Chevalier, Marie-claude Morice, Thierry Lefevre, Patrick Donzeau-gouge
    Abstract:

    Objectives This study sought to evaluate the accuracy, reproducibility, and predictive value for post-procedural aortic regurgitation (AR) of an automated multidetector computed tomography (MDCT) post-processing imaging software, 3mensio Valves (version 5.1.sp1, 3mensio Medical Imaging BV, the Netherlands), in the assessment of patients undergoing transcatheter aortic valve implantation (TAVI). Background Accurate pre-operative aortic annulus Measurements are crucial for patients undergoing TAVI. Methods One hundred five patients undergoing MDCT screening before TAVI were evaluated. Aortic annular Measurement was compared between automated 3mensio Valves software and Manual data post-processing software on a dedicated workstation; we analyzed the discrimination value of annulus Measurement for post-procedural AR in 44 recipients of a self-expanding valve. Results The automated 3mensio Valves software showed good concordance with Manual MDCT Measurements as demonstrated by Bland-Altman analysis. The automated software provided equally good reproducibility as Manual Measurement, especially for Measurement of aortic annulus area (intraobserver intraclass correlation coefficients 0.98 vs. 0.97, interobserver 0.98 vs. 0.95). In 44 patients after implantation of a self-expanding valve, the valve diameter/CT-measured geometric mean annulus diameter ratio by automated 3mensio Valves software showed moderate and better discrimination ability in predicting post-procedural AR compared with Manual Measurement (p = 0.12, area under the curve 0.77, 95% confidence interval: 0.63 to 0.91, area under the curve 0.68, 95% confidence interval: 0.50 to 0.86, respectively). Conclusions The automated 3mensio Valves software demonstrated reliable, reproducible aortic annulus Measurement and better predictive value for post-procedural AR, suggesting important clinical implications for pre-operative assessment of patients undergoing TAVI. © 2013 by the American College of Cardiology Foundation.

Harald J Hoekstra - One of the best experts on this subject based on the ideXlab platform.

  • assessment of volumetric versus Manual Measurement in disseminated testicular cancer no difference in assessment between non radiologists and genitourinary radiologist
    PLOS ONE, 2017
    Co-Authors: Cigdem Ozturk, Ton Velleman, Alphons H H Bongaerts, L M Bergman, Robert J Van Ginkel, Jourik A Gietema, Harald J Hoekstra
    Abstract:

    Background The aim of this study was to assess the feasibility and reproducibility of semi-automatic volumetric Measurement of retroperitoneal lymph node metastases in testicular cancer (TC) patients treated with chemotherapy versus the standardized Manual Measurements based on RECIST criteria. Methods 21 TC patients with retroperitoneal lymph node metastases of testicular cancer were studied with a CT scan of chest and abdomen before and after cisplatin based chemotherapy. Three readers, a surgical resident, a radiological technician and a radiologist, assessed tumor response independently using computerized volumetric analysis with Vitrea software® and Manual Measurement according to RECIST criteria (version 1.1). Intra- and inter-rater variability were evaluated with intra class correlations and Bland-Altman analysis. Results Assessment of intra observer and inter observer variance proved non-significant in both Measurement modalities. In particularly all intraclass correlation (ICC) values for the volumetric analysis were > .99 per observer and between observers. There was minimal bias in agreement for Manual as well as volumetric analysis. Conclusion In this study volumetric Measurement using Vitrea software® appears to be a reliable, reproducible method to measure initial tumor volume of retroperitoneal lymph node metastases of testicular cancer after chemotherapy. Both Measurement methods can be performed by experienced non-radiologists as well.

W. M. Miller - One of the best experts on this subject based on the ideXlab platform.

  • Laser, ultrasonic and Manual Measurements of citrus tree canopy volume
    2001 Sacramento CA July 29-August 1 2001, 2020
    Co-Authors: S. D. Tumbo, Masoud Salyani, Jodie D. Whitney, T. A. Wheaton, W. M. Miller
    Abstract:

    Tools that rapidly quantify tree canopy volumes would be valuable to citrus industry. This study was conducted to compare ultrasonic and laser Measurements of citrus canopy volumes with Manual Measurement methods. Fifteen trees with different canopy heights and volumes were selected for the study. The Manual and ultrasonic Measurements were used to compute a canopy volume in cubic meters whereas laser Measurements were used to compute ‘laser canopy volume index’. The three approaches were statistically compared. It was found that ultrasonic and laser methods have good correlations to the Manual methods (R2 >0.85, RMSE