|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Optics and Spectral Investigation in Dy^(3+)-Doped Borate Glasses显示文摘Dy 3+ -doped borate glasses (LBLB) with high effective visible fluorescence emission were synthesized. The absorption spectrum and fluorescence spectrum of this glass were measured and analyzed. By using J-O theory, the oscillator strengths for some absorption transitions were calculated according to the absorption spectra. The intensity parameters Ω_t (t=2, 4, 6) of Dy 3+ were determined by using a least-squares fitting approach, and the values are 4.04×10 -20 , 1.30×10 -20 and 1.82×10 -20 cm, respectively. The root-mean-square deviation δ_ rms was calculated. Under UV light excitation, Dy 3+ -doped borate glasses (LBLB) emit intense yellowish white lights. The excitation spectrum indicates that argon laser is the effective excitation source in Dy 3+ -doped LBLB glasses. | Hou Yanyan Yang Hongxia Lin Hai Ma Tiecheng Zhai Bin Wang Xiaojun Liu Xingren | 2005 | Journal of Rare Earths2005，23，6： | 2 |
| 2 | Synthesis of Ti2SnC from Ti/Sn/TiC powder mixtures by pressureless sintering technique显示文摘 | Li shibo Bei Guoping Zhai Hongxia | 2006 | Materials Letters2006，，35： | 1 |
| 3 | The value of CT pulmonary angiography to the diagnosis of right ventricular dysfunction due to acute pulmonary embolism:compared with ultrasonographic cardiography显示文摘Objective:To analyze the value of CT pulmonary angiography(CTPA) in assessing right ventricular dysfunction(RVD) after acute pulmonary embolism. Methods:Thirty-six patients with CTPA-confirmed PE who underwent ultrasonic cardiography(UCG) within the ensuing 24 hours were retrospectively reviewed. According to the severity of the disease,the patients were divided into the massive PE group(24 cases) and non-massive PE group(12 cases) respectively. CT scans were analyzed for findings suggestive of RVD. Scans were considered positive for RVD if the right ventricle was dilated(RVd/LVd>1) or if the interventricular septum was straightened or deviated towards the left ventricle. Results were then compared with the results of UCG to estimate the value of CTPA in detecting RVD associated with PE. Results:In all cases,compared with UCG,the diagnostic sensitivity,specificity,positive likelihood ratio,negative likelihood ratio,positive predictive value,and negative predictive value of CTPA was 84.61%,78.26%,3.892,0.197,68.75% and 90% respectively. Kappa value was 0.60,which suggested moderate agreement between CTPA and UCG in the whole level. In the massive PE group,the diagnostic sensitivity,specificity,positive likelihood ratio,negative likelihood ratio,positive predictive value,negative predictive value of CTPA was 84.61%,72.73%,3.103,0.212,78.57% and 80% respectively. Kappa value was 0.58,which suggested moderate agreement between CTPA and UCG in the massive PE group. In the non-massive PE group,the diagnostic specificity of CTPA was 83.33%. By statistics,the value of RVd/LVd had significant difference between the massive PE and the non-massive PE group. Conclusion:CTPA can reliably detect RVD through the evaluation of cardiac morphology. However,this result requires confirmation using a larger prospective cohort study. | Jianguo Wang Li Zhu Min Liu Xiaojuan Guo Chen Wang Youmin Guo Yuanhua Yang Zhenguo Zhai Hongxia Ma Yulin Guo | 2008 | Journal of Nanjing Medical University2008，22，4： | 0 |
| 4 | The dynamic study of the pulmonary artery obstruction degree and the right ventricular function in massive pulmonary embolism on CT pulmonary angiography显示文摘Objective: To analyze the value of CTPA in assessing the dissolve of embolus and the function of the right ventricle dynamically. Methods:Twenty-three cases of massive pulmonary embolism were analyzed retrospectively. The pulmonary artery obstruction index and the right ventricular function parameters were collected and analyzed on CTPA before thrombolytic therapy, 24 hours and 14 days after therapy, respectively. Results:The pulmonary artery obstruction index decreased gradually, and there was significant difference before therapy, 24 hours and 2 weeks after therapy. Twenty-four hours after therapy, the maximal short axes diameter and the maximal transverse area of right ventricle(RVd, RVs) decreased significantly, the maximal short axes diameter and the maximal transverse area of left ventricle(LVd, LVs) increased significantly, and the RVd/LVd, RVs/LVs decreased apparently. The pulmonary artery symbolic pressure before and 24 hours after therapy were apparently different. There was no significant difference between azygos vein, the super vena cava, the main pulmonary artery and vein reflux before and after therapy. Conclusion:CTPA can evaluate the pulmonary artery obstruction degree and right ventricular function dynamically. | Jianguo Wang Xiaojuan Guo Min Liu Youmin Guo Chen Wang Yuanhua Yang Zhenguo Zhai Li Zhu Hongxia Ma Yulin Guo | 2008 | Journal of Nanjing Medical University2008，22，3： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员