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Chen Cui,Gang Yin,Minjie Lu,Xiuyu Chen,Sainan Cheng,Lu Li,Weipeng Yan,Yanyan Song,Sanjay Prasad,Yan Zhang,Shihua Zhao 대한영상의학회 2019 Korean Journal of Radiology Vol.20 No.1
Objective: Segmented cardiac cine magnetic resonance imaging (MRI) is the gold standard for cardiac ventricular volumetric assessment. In patients with difficulty in breath-holding or arrhythmia, this technique may generate images with inadequate quality for diagnosis. Real-time cardiac cine MRI has been developed to address this limitation. We aimed to assess the performance of retrospective electrocardiography-gated real-time cine MRI at 3T for left ventricular (LV) volume and mass measurement. Materials and Methods: Fifty-one patients were consecutively enrolled. A series of short-axis cine images covering the entire left ventricle using both segmented and real-time balanced steady-state free precession cardiac cine MRI were obtained. End-diastolic volume (EDV), end-systolic volume (ESV), stroke volume (SV), ejection fraction (EF), and LV mass were measured. The agreement and correlation of the parameters were assessed. Additionally, image quality was evaluated using European CMR Registry (Euro-CMR) score and structure visibility rating. Results: In patients without difficulty in breath-holding or arrhythmia, no significant difference was found in Euro-CMR score between the two techniques (0.3 ± 0.7 vs. 0.3 ± 0.5, p > 0.05). Good agreements and correlations were found between the techniques for measuring EDV, ESV, EF, SV, and LV mass. In patients with difficulty in breath-holding or arrhythmia, segmented cine MRI had a significant higher Euro-CMR score (2.3 ± 1.2 vs. 0.4 ± 0.5, p < 0.001). Conclusion: Real-time cine MRI at 3T allowed the assessment of LV volume with high accuracy and showed a significantly better image quality compared to that of segmented cine MRI in patients with difficulty in breath-holding and arrhythmia.
Qingbo Xu,Xinyu Wang,Lili Yin,Yanyan Zhang,Peng Wan 한국섬유공학회 2022 Fibers and polymers Vol.23 No.6
In this work, the durable superhydrophobic cotton fabric was successfully constructed by coated with polystyrene(PS) latex particles and polydimethylsiloxane (PDMS) via mist polymerization finishing technology. As a result, the watercontact angle (WCA) of the finished fabric was arrived at 158.1 °, reaching the superhydrophobic level. Even the finishedfabric after withstand 1400 abrasion cycles or 50 washing cycles, the WCA values of treated fabric were also higher than154.0 °, exhibiting excellent mechanical durability. In addition, the superhydrophobic surface of finished fabric was alsoshowed outstanding chemical durability. The finished fabric with such excellent superhydrophobic properties was showedgood oil-water separation properties, the separation efficiency (η) values of the SCF-2 sample as a filter material forchloroform/water and n-hexane/water mixtures were reached 99.6% and 99.1 %, respectively. Moreover, even the SCF-2sample after withstand 50 separation cycles for mixtures, the η values were not obviously reduced. The finished fabric wasalso showed outstanding self-cleaning properties. More interesting that the desired properties of finished fabric were notobviously reduced after the finishing process. Therefore, in consideration of its amazing performances, it is expected that thefinished fabric can be used as a promising material for self-cleaning, oil-water separation, and other potential applicationareas.
Kaixuan Chen,Xiang Zhang,Shuping He,Kaibo Shi,Yanyan Yin 제어·로봇·시스템학회 2022 International Journal of Control, Automation, and Vol.20 No.11
This paper investigates the filtering-based asynchronous fault detection problem for a class of continuoustime conic-type nonlinear semi-Markov jump systems via adaptive event-triggered approach. Firstly, the asynchrony of filter modes and system modes are described by a hidden semi-Markov model. Secondly, an adaptive eventtriggered scheme is developed to reduce the transmissions from the system to the designed filter and improve the efficiency of data transmission. Then, by applying linear matrix inequalities techniques, sufficient conditions are obtained to ensure the stochastic stability and H∞ performance of the fault detection system. Finally, a tunnel diode circuit model is given to confirm the accuracy and effectiveness of the designed approach.