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Your search keyword '"He, H. D."' showing total 30 results
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30 results on '"He, H. D."'

25. Characteristics of geodesic acoustic mode zonal flow and ambient turbulence at the edge of the HL-2A tokamak plasmas

Author

Zhao, K. J., primary, Dong, J. Q., additional, Yan, L. W., additional, Hong, W. Y., additional, Lan, T., additional, Liu, A. D., additional, Qian, J., additional, Cheng, J., additional, Yu, D. L., additional, Huang, Y., additional, He, H. D., additional, Liu, Yi., additional, Yang, Q. W., additional, Duan, X. R., additional, Song, X. M., additional, Ding, X. T., additional, and Liu, Y., additional

Published
2007
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28. Four multidetector-row helical CT: image quality and volume coverage speed.

Author

Hu H, He HD, Foley WD, and Fox SH

Subjects
Adult, Aged, Artifacts, Equipment Design, Evaluation Studies as Topic, Female, Forecasting, Humans, Image Processing, Computer-Assisted instrumentation, Male, Middle Aged, Models, Theoretical, Observer Variation, Pelvis diagnostic imaging, Phantoms, Imaging, Radiographic Image Enhancement instrumentation, Radiography, Abdominal, Radiography, Thoracic, Rotation, Statistics as Topic, Time Factors, Tomography, X-Ray Computed instrumentation, Image Processing, Computer-Assisted methods, Radiographic Image Enhancement methods, Tomography, X-Ray Computed methods
Abstract

Purpose: To evaluate the imaging performance characteristics of four multidetector-row helical computed tomography (CT) and assess improvement in volume coverage speed over that with single multidetector-row helical CT., Materials and Methods: The section-sensitivity profile and image noise of a four multidetector-row scanner were measured with phantom scans and compared with predictions from theoretic models. Nominal section thickness ranged from 1.25 to 10.00 mm, beam collimation from 1.25 to 5.00 mm, and table speed from 3.75 to 30.00 mm per rotation. Image artifacts with four and single multidetector-row helical CT were compared in both a phantom study and a subjective rating analysis of clinical images., Results: Compared with single multidetector-row helical CT, the volume coverage speed of four multidetector-row helical CT (range, 3.75-30.00 mm per rotation) is at least twice as fast as that with single multidetector-row helical CT (1.0-10.0 mm per rotation) with fully comparable image quality or, in many cases, three times as fast with diagnostically comparable image quality., Conclusion: Compared with single multidetector-row helical CT, four multidetector-row helical CT provides a two- to threefold improvement in volume coverage speed with comparable diagnostic image quality.

Published
2000
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29. Future directions in CT technology.

Author

Fox SH, Tanenbaum LN, Ackelsberg S, He HD, Hsieh J, and Hu H

Subjects
Data Display, Fluoroscopy methods, Humans, Image Processing, Computer-Assisted instrumentation, Image Processing, Computer-Assisted methods, Image Processing, Computer-Assisted trends, Radiographic Image Enhancement instrumentation, Radiographic Image Enhancement methods, Tomography, X-Ray Computed instrumentation, Tomography, X-Ray Computed methods, Forecasting, Technology, Radiologic trends, Tomography, X-Ray Computed trends
Abstract

Progress in helical CT acquisition and processing over the last 5 years has lead to new applications and new requirements. Recent progress to meet these requirements is discussed in this article. The potential of future acquisition developments and their potential to further import application are explored.

Published
1998

30. [Influences of 3,4,5-trihydroxystibene-3-beta-mono-D-glucoside on rabbits' platelet aggregation and thromboxane B2 production in vitro].

Author

Shan CW, Yang SQ, He HD, Shao SL, and Zhang PW

Subjects
Animals, Dose-Response Relationship, Drug, Female, In Vitro Techniques, Male, Rabbits, Glucosides pharmacology, Platelet Aggregation drug effects, Platelet Aggregation Inhibitors pharmacology, Stilbenes pharmacology, Thromboxane B2 biosynthesis
Abstract

Platelet aggregation and thromboxane B2 (TXB2) production induced by arachidonic acid (AA) or Adenosine diphosphate (ADP) were studied by turbidimetry and radioimmunoassay in rabbits. 3,4,5-tri-hydroxystibene-3-beta-mono-D-glucoside (PD) 6.7-107.2 mumol/L inhibited platelet aggregation and the production of TXB2 as well. The inhibitions by PD were dose-dependent: 48-90% (AA-induced) and 43-69% (ADP-induced) for platelet aggregation; 50-87% (AA-induced) and 43-68% (ADP-induced) for TXB2. There were positive correlations between the inhibition of platelet aggregation and production of TXB2.

Published
1990

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