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- 저자 : Zhong-bao Ruan (검색결과 2 건)
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Zhong-bao Ruan,Fei Wang,Ge-cai Chen,Li Zhu 연세대학교의과대학 2022 Yonsei medical journal Vol.63 No.4
Purpose: To compare the results of computed tomography angiography (CTA), transesophageal echocardiography (TEE), anddigital subtraction angiography (DSA) measurements and analyze their accuracy, correlation, and consistency in patients whohave successfully undergone left atrial appendage closure (LAAC). Materials and Methods: A total of 157 non-valvular atrial fibrillation (AF) patients who underwent LAAC with Watchman deviceswere included in the study. The maximum diameter and depth of LAA were recorded using CTA, TEE, and DSA. Correlations andagreements were compared. Results: The LAAC procedure was performed successfully in all patients using the Watchman device. There was no significantdifference between DSA and TEE measurements of the diameter of the LAA ostium. LAA ostium diameter obtained by CTA,however, was greater than that from DSA and TEE. Correlations were good between LAA ostium diameter measured by TEE,CTA, and DSA and Watchman device size. DSA measurements and actual device size showed the widest limits of agreement, followedby TEE; CTA measurements showed the narrowest limits of agreement. For LAA depth measurements, mean CTA measurementswere higher than those of TEE and DSA. There was no significant difference in depth measurements among the threeimaging modalities. Conclusion: CTA, TEE, and DSA measurements exhibited good correlations with Watchman device size. The ostium diameterand depth of the LAA measured by CTA were greater than those measured by TEE and DSA. The relevance and concordance ofCTA measurements were the strongest.
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X. C. Ruan,G. C. Chen,H. X. Huang,X. Li,Y. B. Nie,B. Zhou,Z. Y. Ma,J. Bao,Q. P. Zhong,Z. Y. Zhou,H. Q. Tang,J. S. Zhang,C. L. Lan,Y. L. Zhang,Y. M. Li 한국물리학회 2011 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.59 No.23
More and more interests have been paid to the differential and double-differential neutron emission cross sections (DX and DDX) at above 20 MeV region in recent years. At the China Institute of Atomic Energy (CIAE), a program to measure the DX and DDX between 20 and 30 MeV neutron energy region has been carried out. The d-T reaction neutron source was used to produce the 20 - 30 MeV neutrons with a tritium gas target at the HI-13 tandem accelerator at CIAE. The time-of-flight(TOF) technique was used to measure the neutron energy from about 1 MeV to 30 MeV with 3 BC501A liquid scintillators (with a size of Φ180 ×100 mm). A preliminary measurement has been carried out for ^9Be at 22 MeV. The measured data were analyzed by detailed Monte-Carlo simulation to perform the multiple scattering, flux attenuation and finite geometry corrections. The experimental details, the data analysis, the progress, the results and the future plan will be presented in this report.
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