Flow instability phenomena limit the operating range of compressors, so the study of instability inceptions has received a lot of attention.Casing treatment is a commonly used technique to extend the operating range.In order to study the effect of casing treatment on the instability inception and its evolution, experimental investigations are carried out on a transonic axial flow compressor operating at a low rotor speed.By comparing the dynamic instability signals with and without casing treatment, it can be found that the existence of casing treatment can alter the type of instability inception and restrain its development.Based on the discussion of the simulation results, the radial redistribution of blade loading caused by the casing treatment is considered to be the main reason for the change of instability inception.
Heart failure (HF) is an extremely major health problem with gradually increasing incidence in developed and developing countries. HF may lead to cardiac remodeling; thus, advanced imaging techniques are required to comprehensively evaluate cardiac mechanics. Recently, three-dimensional speckle-tracking echocardiography (3D-STE) has been developed as a novel imaging technology that is based on the three-dimensional speckle-tracking on the full volume three-dimensional datasets. Three-dimensional speckle-tracking echocardiography allows a more accurate evaluation of global and regional myocardial performance, assessment of cardiac mechanics, detection of subclinical cardiac dysfunction, and prediction of adverse clinical events in a variety of cardiovascular diseases. Therefore, this review summarizes the clinical usefulness of 3D-STE in patients with HF.
We presented a 28-year-old man with myocardial infarction with an apical mass detected by echocardiography. Compared with routine imaging using a phased transducer array, linear transducer arrays were used in two-dimensional and contrast echocardiography to enhance apical visualization and successfully demonstrated the shape and blood perfusion of apical thrombus with precision. We successfully explored the feasibility of imaging the apical thrombus with a linear transducer array.
Journal Article Corrected proof Utilizing multimodal imaging for diagnosing a complex apical aneurysm Get access Ruohan Zhao, Ruohan Zhao Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, ChinaHubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, ChinaHubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China Search for other works by this author on: Oxford Academic PubMed Google Scholar Wenqian Wu, Wenqian Wu Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, ChinaHubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, ChinaHubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China Search for other works by this author on: Oxford Academic PubMed Google Scholar Xin Chen, Xin Chen Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, ChinaHubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, ChinaHubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China Search for other works by this author on: Oxford Academic PubMed Google Scholar Mingxing Xie, Mingxing Xie Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, ChinaHubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, ChinaHubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China Corresponding author. E-mail: xiemx@hust.edu.cn (M.X.); lvqing1987@hust.edu.cn (Q.L.) https://orcid.org/0000-0003-4984-1567 Search for other works by this author on: Oxford Academic PubMed Google Scholar Qing Lv Qing Lv Department of Ultrasound Medicine, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, ChinaHubei Province Clinical Research Center for Medical Imaging, Wuhan 430022, ChinaHubei Province Key Laboratory of Molecular Imaging, Wuhan 430022, China Corresponding author. E-mail: xiemx@hust.edu.cn (M.X.); lvqing1987@hust.edu.cn (Q.L.) https://orcid.org/0000-0002-4142-9474 Search for other works by this author on: Oxford Academic PubMed Google Scholar European Heart Journal - Cardiovascular Imaging, jeae057, https://doi.org/10.1093/ehjci/jeae057 Published: 26 February 2024 Article history Published: 26 February 2024 Corrected and typeset: 13 March 2024
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