Clinical application of improved 2D computer-assisted fluoroscopic navigation through simulating a 3D vertebrae image to guide pedicle screw internal fixation

Objective To study the effect of using improved 2D computer-assisted fluoroscopic navigation through simulating 3D vertebrae image to guide pedicle screw internal fixation.Methods Posterior pedicle screw internal fixation,distraction

Rui Liao's work on patient-specific 3-D model guidance for interventional and hybrid-operating-room applications

Compared to surgery,interventional and hybrid-operating-room(OR) approaches diagnose or treat pathology with the most minimally invasive techniques possible.By minimizing the physical trauma to the patient,peripheral or hybrid approaches can reduce infection rates and recovery time as well as shorten hospital stays.Minimally invasive approaches therefore are the trend and often the preferred choice,and may even be the only option for the patients associated with high surgery risks.Common interventional imaging modalities include 2-D X-ray fluoroscopy and ultrasound.However,fluoroscopic images do not display the anatomic structures without a contrast agent,which on the other hand,needs to be minimized for patients' safety.Ultrasound images suffer from relatively low image quality and tissue contrast problems.To augment the doctor's view of the patient's anatomy and help doctors navigate the devices to the targeted area with more confidence and a higher accuracy,high-resolution pre-operative volumetric data such as computed tomography and/or magnetic resonance can be fused with intra-operative 2-D images during interventions.A seamless workflow and accurate 2-D/3-D registrationas well as cardiac and/or respiratory motion compensation are the key components for a successful image guidance system using a patient-specific 3-D model.Dr.Liao's research has been focused on developing methods and systems of 3-D model guidance for various interventions and hybrid-OR applications.Dr.Liao' s work has led to several Siemens products with high clinical and/or market impact and a good number of scientific publications in leading journals/conferences on medical imaging.

2,3,4,6-四-O-乙酰基-D-吡喃葡萄糖研究概述

2,3,4,6-四-O-乙酰基-D-吡喃葡萄糖是一种廉价易得的药物中间体,常被用作合成糖类衍生物药物。本文分别介绍了2,3,4,6-四-O-乙酰基-D-吡喃葡萄糖的合成方法、检测方法、理化性质和相关用途,重点介绍了合成方法和用途,指出目前合成工艺存在的主要问题及对环境友好性作简要分析。

Recent progress in optoelectronic applications of hybrid 2D/3D silicon-based heterostructures

Silicon-based semiconductor technology has made great breakthroughs in the past few decades,but it is reaching the physical limits of Moore’s law.In recent years,the presence of two-dimensional(2 D)materials was regarded as an opportunity to break the limitation of traditional siliconbased optoelectronic devices owing to their special structure and superior properties.In consideration of the widely studied hybrid integration of 2 D material detectors and 3 D siliconbased systems,in this paper,the basic properties of several 2 D materials used in photodetectors are summarized.Subsequently,the progress in silicon photonic integrated photodetectors based on 2 D materials is reviewed,followed by the summarization of the device structure and main performances.Then,the combination of some other traditional and2 D devices is discussed as a supplement.Finally,the prospective development of the hybrid 2 D/3 D silicon-based heterostructures is expected.

纳米Al_2O_3改性双酚A型环氧丙烯酸酯的制备与性能研究

选用硅烷偶联剂KH570对纳米Al_2O_3进行表面改性处理,并用改性后的Al_2O_3对双酚A环氧丙烯酸酯进行复合改性,研究了纳米Al_2O_3含量(1%(wt)~5%(wt))对树脂性能的影响。结果表明:改性纳米Al_2O_3质量分数为5%时的复合材料的体积收缩率最小,为6.48%;粒子质量分数为2%时,树脂的凝胶率最大,为88.3%;热失重测试结果表明,改性纳米Al_2O_3提高了树脂的热稳定性;拉伸性能显示,随着改性纳米Al_2O_3质量分数的增加,复合材料的拉伸强度先升高后下降,当改性纳米Al_2O_3质量分数为3%时,复合树脂拉伸强度最大,为34.74MPa,与未改性树脂相比,拉伸强度提高了108.27%。本文所制备的改性光敏树脂可适用于3D打印环境。