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  • Other Sources  (7)
  • 1995-1999  (7)
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  • 1
    Publication Date: 2011-08-24
    Description: The geometry of the left ventricle in patients with cardiomyopathy is often sub-optimal for 2-dimensional ultrasound when assessing left ventricular (LV) function and localized abnormalities such as a ventricular aneurysm. The aim of this study was to report the initial experience of real-time 3-D echocardiography for evaluating patients with cardiomyopathy. A total of 34 patients were evaluated with the real-time 3D method in the operating room (n = 15) and in the echocardiographic laboratory (n = 19). Thirteen of 28 patients with cardiomyopathy and 6 other subjects with normal LV function were evaluated by both real-time 3-D echocardiography and magnetic resonance imaging (MRI) for obtaining LV volumes and ejection fractions for comparison. There were close relations and agreements for LV volumes (r = 0.98, p 〈0.0001, mean difference = -15 +/- 81 ml) and ejection fractions (r = 0.97, p 〈0.0001, mean difference = 0.001 +/- 0.04) between the real-time 3D method and MRI when 3 cardiomyopathy cases with marked LV dilatation (LV end-diastolic volume 〉450 ml by MRI) were excluded. In these 3 patients, 3D echocardiography significantly underestimated the LV volumes due to difficulties with imaging the entire LV in a 60 degrees x 60 degrees pyramidal volume. The new real-time 3D echocardiography is feasible in patients with cardiomyopathy and may provide a faster and lower cost alternative to MRI for evaluating cardiac function in patients.
    Keywords: Life Sciences (General)
    Type: The American journal of cardiology (ISSN 0002-9149); Volume 84; 9; 1068-73
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  • 2
    Publication Date: 2011-08-24
    Description: Over the last five years, with the advent of flights of U.S. Shuttle/Spacelab missions dedicated entirely to life sciences research, the opportunities for conducting serious studies that use a fully outfitted space laboratory to better understand basic biological processes have increased. The last of this series of Shuttle/Spacelab missions, currently scheduled for 1998, is dedicated entirely to neuroscience and behavioral research. The mission, named Neurolab, includes a broad range of experiments that build on previous research efforts, as well as studies related to less mature areas of space neuroscience. The Neurolab mission provides the global scientific community with the opportunity to use the space environment for investigations that exploit microgravity to increase our understanding of basic processes in neuroscience. The results from this premier mission should lead to a significant advancement in the field as a whole and to the opening of new lines of investigation for future research. Experiments under development for this mission will utilize human subjects as well as a variety of other species. The capacity to carry out detailed experiments on both human and animal subjects in space allows a diverse complement of studies that investigate functional changes and their underlying molecular, cellular, and physiological mechanisms. In order to conduct these experiments, a wide array of biomedical instrumentation will be used, including some instruments and devices being developed especially for the mission.
    Keywords: Life Sciences (General)
    Type: BME = Bio medical engineering / henshu, Nihon ME Gakkai (ISSN 0913-7556); Volume 10; 1; 11-25
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  • 3
    Publication Date: 2011-08-23
    Description: We report possible detection of pi (exp 0) decay radiation from Cyg OB2, a nearby (1.7 kpc) massive OB star association. The EGRET flux (greater than 100 MeV) maps clearly indicate a point source whose error circle includes both Cyg OB2 and Cyg X-3. We show that Cyg X-3 is unlikely to be the counterpart for the EGRET source, because of the marginal spatial consistency and the lack of the 4.8 hour modulation seen in other high energy emissions from Cyg X-3. If confirmed, this will be the first detection by EGRET of massive stars.
    Keywords: Space Radiation
    Type: Astronomy and Astrophysics Supplement Series; Volume 120; 423-426
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  • 4
    Publication Date: 2019-08-17
    Description: The tracking and imaging gamma ray experiment (TIGRE) Compton telescope concept can provide an angular resolution of a few arcmin, an energy resolution of a few keV and high sensitivity, while providing the wide field of view necessary for surveying and monitoring observations. Silicon and CdZnTe strip detectors are used to detect Compton pair events and determine their incident directions and energies. Above 400 keV, Compton recoil electrons are tracked through successive layers of thin silicon strip detectors. Compton scattered photons are detected with CdZnTe strip detectors. Pair electrons and positrons are tracked to provide high sensitivity observations in the 10 to 100 MeV range. Polarization studies are performed with large angle Compton scatter events. The TIGRE concept and development status are described.
    Keywords: Astronomy
    Type: ; 367-370
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  • 5
    Publication Date: 2019-08-16
    Description: No abstract available
    Keywords: Aerospace Medicine
    Type: Medicine and science in sports and exercise (ISSN 0195-9131); 28; 10 Suppl; S1-112
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  • 6
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    In:  Other Sources
    Publication Date: 2019-08-16
    Description: No abstract available
    Keywords: Life Sciences (General)
    Type: Medicine and science in sports and exercise (ISSN 0195-9131); 28; 10 Suppl; S111-2
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  • 7
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    In:  Other Sources
    Publication Date: 2019-08-15
    Description: No abstract available
    Keywords: Life Sciences (General)
    Type: Medicine and science in sports and exercise (ISSN 0195-9131); 28; 10 Suppl; S1-2
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