Quantitative Evaluation

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Ke Wang - One of the best experts on this subject based on the ideXlab platform.

  • computed tomography enterography Quantitative Evaluation on crohn s disease activity
    Gastroenterology Research and Practice, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn's disease (CD). Methods There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0-2), mild (3-6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn's disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P < 0.001 in all). Correlative analysis showed that compared with the SES-CD, the bowel wall thickening (r = 0.564, P < 0.001), mural hyperenhancement in the portal vein period (r = 0.585, P < 0.001), and ΔCT value (r = 0.533, P < 0.001) were moderately correlated. Conclusion The mural hyperenhancement in the portal vein period, bowel wall thickening, and ΔCT value can accurately and Quantitatively assess the activity of CD lesions and are potential visual biomarkers of CD lesions.

  • Computed Tomography Enterography: Quantitative Evaluation on Crohn’s Disease Activity
    Hindawi Limited, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective. To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn’s disease (CD). Methods. There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0–2), mild (3–6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn’s disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results. In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P

Jingyun Cheng - One of the best experts on this subject based on the ideXlab platform.

  • computed tomography enterography Quantitative Evaluation on crohn s disease activity
    Gastroenterology Research and Practice, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn's disease (CD). Methods There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0-2), mild (3-6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn's disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P < 0.001 in all). Correlative analysis showed that compared with the SES-CD, the bowel wall thickening (r = 0.564, P < 0.001), mural hyperenhancement in the portal vein period (r = 0.585, P < 0.001), and ΔCT value (r = 0.533, P < 0.001) were moderately correlated. Conclusion The mural hyperenhancement in the portal vein period, bowel wall thickening, and ΔCT value can accurately and Quantitatively assess the activity of CD lesions and are potential visual biomarkers of CD lesions.

  • Computed Tomography Enterography: Quantitative Evaluation on Crohn’s Disease Activity
    Hindawi Limited, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective. To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn’s disease (CD). Methods. There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0–2), mild (3–6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn’s disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results. In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P

Hui Xie - One of the best experts on this subject based on the ideXlab platform.

  • computed tomography enterography Quantitative Evaluation on crohn s disease activity
    Gastroenterology Research and Practice, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn's disease (CD). Methods There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0-2), mild (3-6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn's disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P < 0.001 in all). Correlative analysis showed that compared with the SES-CD, the bowel wall thickening (r = 0.564, P < 0.001), mural hyperenhancement in the portal vein period (r = 0.585, P < 0.001), and ΔCT value (r = 0.533, P < 0.001) were moderately correlated. Conclusion The mural hyperenhancement in the portal vein period, bowel wall thickening, and ΔCT value can accurately and Quantitatively assess the activity of CD lesions and are potential visual biomarkers of CD lesions.

  • Computed Tomography Enterography: Quantitative Evaluation on Crohn’s Disease Activity
    Hindawi Limited, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective. To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn’s disease (CD). Methods. There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0–2), mild (3–6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn’s disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results. In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P

Hao Yang - One of the best experts on this subject based on the ideXlab platform.

  • computed tomography enterography Quantitative Evaluation on crohn s disease activity
    Gastroenterology Research and Practice, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn's disease (CD). Methods There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0-2), mild (3-6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn's disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P < 0.001 in all). Correlative analysis showed that compared with the SES-CD, the bowel wall thickening (r = 0.564, P < 0.001), mural hyperenhancement in the portal vein period (r = 0.585, P < 0.001), and ΔCT value (r = 0.533, P < 0.001) were moderately correlated. Conclusion The mural hyperenhancement in the portal vein period, bowel wall thickening, and ΔCT value can accurately and Quantitatively assess the activity of CD lesions and are potential visual biomarkers of CD lesions.

  • Computed Tomography Enterography: Quantitative Evaluation on Crohn’s Disease Activity
    Hindawi Limited, 2018
    Co-Authors: Jingyun Cheng, Hui Xie, Hao Yang, Ke Wang
    Abstract:

    Objective. To explore the feasibility of computed tomography enterography (CTE) in the Quantitative Evaluation of the activity of Crohn’s disease (CD). Methods. There were 49 CD patients with whole clinical, enteroscopy, and CTE data to be analyzed retrospectively. The patients were graded as inactive (0–2), mild (3–6), and moderate-severe group (>6) based on simplified endoscopic activity score for Crohn’s disease (SES-CD). The differences in bowel wall thickening, mural hyperenhancement in the portal vein period, and the ΔCT values were analyzed among groups using ANOVA (analysis of variance) and q test. Then, the parameters were correlated with SES-CD, C-reactive protein (CRP), and erythrocyte sedimentation rate (ESR). Results. In the 49 patients, 13 ones were inactive, 19 ones were mild, and 17 ones were moderate-severe; the thickness of bowel wall, mural hyperenhancement in the portal vein period, and ΔCT value among groups were all significantly different (P

Li Yong - One of the best experts on this subject based on the ideXlab platform.

  • An efficient electromagnetic and thermal modelling of eddy current pulsed thermography for Quantitative Evaluation of blade fatigue cracks in heavy-duty gas turbines
    'Elsevier BV', 2020
    Co-Authors: Tong Zongfei, Li Yong, Xie Shejuan, Liu Haochen, Zhang Weixu, Pei Cuixiang, Chen Zhenmao, Uchimoto Tetsuya, Takagi Toshiyuki
    Abstract:

    The blade surface fatigue cracks often occur during service of Heavy-Duty Gas Turbines (HDGT) in high temperature, high rotational velocity and high frequency vibration environment. These fatigue cracks seriously threaten the safe operation of heavy-duty gas turbines, which would cause significant hazard or economic loss. The Quantitative Evaluation of blade surface fatigue cracks is extremely significant to HDGT. Eddy current pulsed thermography (ECPT) is an emerging non-destructive testing technology and show great potential for fatigue crack Evaluation. This paper proposes a novel electromagnetic and thermal modelling of ECPT to achieve fast and effective Quantitative Evaluation for surface fatigue cracks. First, the proposed numerical method calculates electromagnetic field using the reduced magnetic vector potential method in the frequency domain based on frequency series method. The thermal source is transformed to an equivalent and simple form according to the energy equivalent method. Second, the temperature signals of ECPT are calculated through the time-domain iteration strategy with a relatively large time step. Then the ECPT experimental setup is established and the developed simulator is validated numerically and experimentally. The developed simulator is five times faster than the previous one and can be applied to eddy current thermography (ECT) with any kind of excitation waveforms. Finally, the depth of surface fatigue crack is Quantitatively evaluated by means of the developed simulator, which is not only a promising simulation progress for ECPT, but also can be an effective tool embedded HDGT though-life maintenanc

  • Quantitative Evaluation of thermal barrier coating based on eddy current technique
    Ndt & E International, 2012
    Co-Authors: Li Yong, Zhenmao Chen, Ying Mao, Qi Yong
    Abstract:

    Abstract Thermal Barrier Coating (TBC), as the insulation between high-temperature gas and the alloying bodies of gas turbine blades, is adopted for protection and long-term service of gas turbines. It is imperative to non-destructively evaluate TBC of blades, since the TBC with thin thickness or delamination will lead to catastrophic accidents of gas turbines. In this paper, Eddy Current inspection (EC) is proposed for Quantitative Evaluation of TBC, which involves estimation of: (1) thickness of the top coating to identify possible thinning and (2) thickness and conductivity of bond coating to detect delamination and degradation. In an effort to implement the fast inversion, the closed-form expressions of the Jacobian matrix are derived based on Truncated Region Eigenfunction Expansion (TREE) modeling. The Levenberg–Marquardt (LM) algorithm is also adopted in the inversion for the parameters. The proposed inverse algorithm is verified by hybrid numerical modeling and experiments, which indicates that the Quantitative Evaluation of TBC by using EC in conjunction with the proposed inverse algorithm is valid and applicable to the engineering application.