资源类型

期刊论文 131

会议视频 1

年份

2023 15

2022 13

2021 9

2020 11

2019 7

2018 9

2017 4

2016 5

2015 8

2014 3

2013 5

2012 6

2011 9

2010 6

2009 5

2008 3

2007 6

2006 1

2004 1

2003 1

展开 ︾

关键词

区块链 2

扫描格式转换 2

气体辅助注射成型 2

运动估计 2

3D打印 1

CCD影像 1

HIFU 1

PV/T 1

SAA7121 1

SAHP 1

TMS320DM642 1

TVP5150 1

临床前大动物实验 1

临床转化 1

乳腺癌 1

二氧化钛 1

人居辅助环境 1

人工智能 1

代表帧 1

展开 ︾

检索范围：

排序： 展示方式：

Lobectomy by video-assisted thoracoscopic surgery (VATS) for early stage of non-small cell lung cancer

null

《医学前沿（英文）》 2011年 第5卷 第1期   页码 53-60 doi: 10.1007/s11684-011-0121-2

摘要：

Video-assisted thoracoscopic surgery (VATS) provides a new approach for treating early-stage lung cancer. Lobectomy by VATS has many advantages over conventional thoracotomy, such as shorter recovery time, less postoperative pain, and faster resumption of a normal lifestyle. However, there is still much debate on the role of VATS in lobectomy for the treatment of lung cancer. Concerns regarding safety, the extent of mediastinal lymph node dissection, and long-term survival have made some surgeons apprehensive of its validity for lung cancer. In this paper, we review the development of thoracoscopy, the present status of VATS for early stage of non-small cell lung cancer (NSCLC), and comparison between VATS and open thoracotomy in the management of NSCLC.

关键词： non-small cell lung cancer     video-assisted thoracoscopic surgery     lobectomy    

HTML PDF 收藏

Guidelines for navigation-assisted spine surgery

Bo Liu, Da He, Yajun Liu, Xiaoguang Han, Jingwei Zhao, Mingxing International Society for Computer AssistedOrthopaedic Surgery

《医学前沿（英文）》 2020年 第14卷 第4期   页码 518-527 doi: 10.1007/s11684-020-0775-8

摘要： Spinal surgery is a technically demanding and challenging procedure because of the complicated anatomical structures of the spine and its proximity to several important tissues. Surgical landmarks and fluoroscopy have been used for pedicle screw insertion but are found to produce inaccuracies in placement. Improving the safety and accuracy of spinal surgery has increasingly become a clinical concern. Computer-assisted navigation is an extension and application of precision medicine in orthopaedic surgery and has significantly improved the accuracy of spinal surgery. However, no clinical guidelines have been published for this relatively new and fast-growing technique, thus potentially limiting its adoption. In accordance with the consensus of consultant specialists, literature reviews, and our local experience, these guidelines include the basic concepts of the navigation system, workflow of navigation-assisted spinal surgery, some common pitfalls, and recommended solutions. This work helps to standardize navigation-assisted spinal surgery, improve its clinical efficiency and precision, and shorten the clinical learning curve.

关键词： guidelines     spine surgery     computer-assisted navigation    

HTML PDF 收藏

Learning curve of totally thoracoscopic pulmonary segmentectomy

Weibing Wu, Jing Xu, Wei Wen, Yue Yu, Xinfeng Xu, Quan Zhu, Liang Chen

《医学前沿（英文）》 2018年 第12卷 第5期   页码 586-592 doi: 10.1007/s11684-017-0566-z

摘要：

Totally thoracoscopic pulmonary segmentectomy (TTPS) is a feasible and safe technique that requires advanced thoracoscopic skills and knowledge of pulmonary anatomy. However, data describing the learning curve of TTPS have yet to be obtained. In this study, 128 patients who underwent TTPS between September 2010 and December 2013 were retrospectively analyzed to evaluate the learning curve and were divided chronologically into three phases, namely, ascending phase (A), plateau phase (B), and descending phase (C), through cumulative summation (CUSUM) for operative time (OT). Phases A, B, and C comprised 39, 33, and 56 cases, respectively. OT and blood loss decreased significantly from phases A to C (P <0.01), and the frequency of intraoperative bronchoscopy for target bronchus identification decreased gradually (A, 8/39; B, 4/33; C, 3/56; P = 0.06). No significant differences were observed in demographic factors, conversion, complications, hospital stay, and retrieved lymph nodes among the three phases. Surgical outcomes and techniques improved with experience and volume. CUSUMOT indicated that the learning curve of TTPS should be more than 72 cases.

关键词： thoracoscopic     segmentectomy     learning curve     CUSUM    

HTML PDF 收藏

Laparoscopic surgery for pancreatic lesions: current status and future

Taiping Zhang, Xiao Du, Yupei Zhao

《医学前沿（英文）》 2011年 第5卷 第3期   页码 277-282 doi: 10.1007/s11684-011-0147-5

摘要： Laparoscopic pancreatic surgery has been gaining increasing recognition in recent years, and its practice has increased despite its highly complex procedure and longer learning curve compared with surgeries for other abdominal organs. Laparoscopic distal pancreatectomy and tumor enucleation are two of the fastest-growing techniques and are currently in wide use because of their comparable technical simplicity. Literature review showed that laparoscopic distal pancreatectomy and enucleation are safe and efficient approaches for benign and low-degree malignant tumors; however, the indication for malignant tumors remains controversial. Laparoscopic pancreaticoduodenectomy is practiced in a limited number of surgical centers and presented as case reports or in small series. Although its feasibility was demonstrated by many surgeons, whether the laparoscopic procedure can achieve benefits comparable to or even more prominent than those of an open procedure has not been clinically proven. Prospective, randomized, controlled trials of laparoscopic operation versus open pancreatic surgery are necessary to justify the wide application and routine practice of the laparoscopic procedure for pancreatic lesions.

关键词： minimally invasive surgery     pancreatic surgery     pancreatic neoplasm     distal pancreatic lesions     pancreatic fistula    

HTML PDF 收藏

A reversibility-gain model for integer Karhunen-Loève transform design in video coding

Xing-guo ZHU,Lu YU

《信息与电子工程前沿（英文）》 2015年 第16卷 第10期   页码 883-891 doi: 10.1631/FITEE.1500071

摘要： Karhunen-Loève transform (KLT) is the optimal transform that minimizes distortion at a given bit allocation for Gaussian source. As a KLT matrix usually contains non-integers, integer-KLT design is a classical problem. In this paper, a joint reversibility-gain (R-G) model is proposed for integer-KLT design in video coding. Specifically, the ‘reversibility’ is modeled according to distortion analysis in using forward and inverse integer transform without quantization. It not only measures how invertible a transform is, but also bounds the distortion introduced by the non-orthonormal integer transform process. The ‘gain’ means transform coding gain (TCG), which is a widely used criterion for transform design in video coding. Since KLT maximizes the TCG under some assumptions, here we define the TCG loss ratio (LR) to measure how much coding gain an integer-KLT loses when compared with the original KLT. Thus, the R-G model can be explained as follows: subject to a certain TCG LR, an integer-KLT with the best reversibility is the optimal integer transform for a given non-integer-KLT. Experimental results show that the R-G model can guide the design of integer-KLTs with good performance.

关键词： Integer transform     Karhunen-Loè     ve transform (KLT)     Integer-KLT     Transform coding     Video coding    

HTML PDF 收藏

Image analyses for video-based remote structure vibration monitoring system

Yang YANG,Xiong (Bill) YU

《结构与土木工程前沿（英文）》 2016年 第10卷 第1期   页码 12-21 doi: 10.1007/s11709-016-0313-6

摘要： Video-based vibration measurement is a cost-effective way for remote monitoring the health conditions of transportation and other civil structures, especially for situations where accessibility is restricted and does not allow installation of conventional monitoring devices. Besides, video-based system is global measurement. The technical basis of video-based remote vibration measurement system is digital image analysis. Comparison of the images allow the field of motion to be accurately delineated. Such information is important to understand the structure behaviors including the motion and strain distribution. This paper presents system and analyses to monitor the vibration velocity and displacement field. The performance is demonstrated on a testbed of model building. Three different methods (i.e., frame difference method, particle image velocimetry, and optical Flow Method) are utilized to analyze the image sequences to extract the feature of motion. The Performance is validated using accelerometer data. The results indicate that all three methods can estimate the velocity field of the model building, although the results can be affected by factors such as background noise and environmental interference. Optical flow method achieved the best performance among these three methods studied. With further refinement of system hardware and image processing software, it will be developed into a remote video based monitoring system for structural health monitoring of transportation infrastructure to assist the diagnoses of its health conditions.

关键词： structure health monitoring     velocity estimation     frame difference     PIV     optical-flow method    

HTML PDF 收藏

Advances in tissue state recognition in spinal surgery: a review

Hao Qu, Yu Zhao

《医学前沿（英文）》 2021年 第15卷 第4期   页码 575-584 doi: 10.1007/s11684-020-0816-3

摘要： Spinal disease is an important cause of cervical discomfort, low back pain, radiating pain in the limbs, and neurogenic intermittent claudication, and its incidence is increasing annually. From the etiological viewpoint, these symptoms are directly caused by the compression of the spinal cord, nerve roots, and blood vessels and are most effectively treated with surgery. Spinal surgeries are primarily performed using two different techniques: spinal canal decompression and internal fixation. In the past, tactile sensation was the primary method used by surgeons to understand the state of the tissue within the operating area. However, this method has several disadvantages because of its subjectivity. Therefore, it has become the focus of spinal surgery research so as to strengthen the objectivity of tissue state recognition, improve the accuracy of safe area location, and avoid surgical injury to tissues. Aside from traditional imaging methods, surgical sensing techniques based on force, bioelectrical impedance, and other methods have been gradually developed and tested in the clinical setting. This article reviews the progress of different tissue state recognition methods in spinal surgery and summarizes their advantages and disadvantages.

关键词： spinal surgery     tissue state recognition     image     force sensing     bioelectrical impedance    

HTML PDF 收藏

Current progress on natural orifice transluminal endoscopic surgery (NOTES)

null

《医学前沿（英文）》 2012年 第6卷 第2期   页码 187-194 doi: 10.1007/s11684-012-0198-2

摘要：

Natural orifice transluminal endoscopic surgery (NOTES) has received considerable interest in recent years as a novel surgical technique. Here, we aim to review the current progress on NOTES, particularly focusing on the advantages and complications related to NOTES, the recent advances of surgical approaches, new instruments for closure of the natural orifice incision, and the newly developed platform for NOTES. Finally, we make a prediction of the conceivable applications of NOTES on human subjects.

关键词： natural orifice transluminal endoscopic surgery (NOTES)     laparotomy     laparoscopy    

HTML PDF 收藏

视频分层组织方案和技术

章毓晋,陆海斌

《中国工程科学》 2000年 第2卷 第3期   页码 18-22

摘要：

数字视频是多媒体信息系统中重要的数据类型。传统的视频表示方法仅是一个时间序列一媒体流， 所以对计算机来说，很难在内容层次上认知视频。为了有效地访问和利用视频信息，合适的视频数据组织非常 重要。文章提出将视频划分成四个层次即视频节目、情节、镜头和图像帧的组织方法。这样一种分层结构提供了紧凑和有意义的视频目录，方便了视频非线性浏览和基于内容的检索。为了得到这样一种组织，不仅要检测 出镜头和情节这些视频单元的边界，还要提取镜头关键帧和选择情节有代表性的镜头和代表帧。文章介绍一系 列分割视频和组织视频的准则和方法，并把它们结合起来组成了一个原型实验系统。文中还给出了一些对实际 视频进行组织的结果，它们表明该组织形式是非常有效的。

关键词： 视频组织     浏览     镜头     关键帧     情节     代表帧    

HTML PDF 收藏

Achievements in burn surgery over the past 50 years in China

WANG Shiliang

《医学前沿（英文）》 2008年 第2卷 第4期   页码 332-336 doi: 10.1007/s11684-008-0063-5

摘要： This paper reflects on the advancements of clinical and scientific research in the field of burn surgery in China. It includes emergency care of massive burns, resuscitation, anti-infection, prevention and cure of internal organ injuries, metabolic and nutritional support, wound repair and rehabilitation, and special types of burns; it also covers pathology, microbiology, immunology, cell biology, molecular biology, and tissue engineering.

关键词： immunology     scientific     nutritional     microbiology     engineering    

HTML PDF 收藏

Development of lunar regolith composite and structure via laser-assisted sintering

《机械工程前沿（英文）》 doi: 10.1007/s11465-021-0662-2

摘要： Aiming at the exploration and resource utilization activities on the Moon, in situ resource utilization and in situ manufacturing are proposed to minimize the dependence on the ground transportation supplies. In this paper, a laser-assisted additive manufacturing process is developed to fabricate lunar regolith composites with PA12/SiO2 mixing powders. The process parameters and composite material compositions are optimized in an appropriate range through orthogonal experiments to establish the relationship of process–structure–property for lunar regolith composites. The optimal combination of composite material compositions and process parameters are mixing ratio of 50/50 in volume, laser power of 30 W, scanning speed of 3500 mm/s, and scanning hatch space of 0.2 mm. The maximum tensile strength of lunar regolith composites reaches 9.248 MPa, and the maximum depth of surface variation is 120.79 μm, which indicates poor powder fusion and sintering quality. Thereafter, the mechanical properties of laser-sintered lunar regolith composites are implemented to the topology optimization design of complex structures. The effectiveness and the feasibility of this laser-assisted process are potentially developed for future lightweight design and manufacturing of the solar panel installed on the lunar rover.

关键词： in situ manufacturing     laser-assisted powder fusion process     mechanical properties     topological structure design    

HTML PDF 收藏

Risk factors for ventilator-associated pneumonia among patients undergoing major oncological surgery

null

《医学前沿（英文）》 2017年 第11卷 第2期   页码 239-246 doi: 10.1007/s11684-017-0509-8

摘要：

Patients undergoing major oncological surgery for head and neck cancer (SHNC) have a particularly high risk of nosocomial infections. We aimed to identify risk factors for ventilator-associated pneumonia (VAP) in patients undergoing SHNC. The study included 465 patients who underwent SHNC between June 2011 and June 2014. The rate of VAP, risk factors for VAP, and biological aspects of VAP were retrospectively evaluated. The incidence of VAP was 19.6% (n=95) in patients who required more than 48 h of mechanical ventilation. Staphylococcus (37.7%), Enterobacteriaceae (32.1%), Pseudomonas(20.8%), and Haemophilus (16.9%) were the major bacterial species that caused VAP. The independent risk factors for VAP were advanced age, current smoking status, chronic obstructive pulmonary disease, and a higher simplified acute physiology score system II upon admission. Tracheostomy was an independent protective factor for VAP. The median length of stay in the ICU for patients who did or did not develop VAP was 8.0 and 6.5 days, respectively (P=0.006). Mortality among patients who did or did not develop VAP was 16.8% and 8.4%, respectively (P<0.001). The potential economic impact of VAP was high because of the significantly extended duration of ventilation. A predictive regression model was developed with a sensitivity of 95.3% and a specificity of 69.4%. VAP is common in patients who are undergoing SHNC and who require more than 48 h of mechanical ventilation. Therefore, innovative preventive measures should be developed and applied in this high-risk population.

关键词： ventilator-associated pneumonia (VAP)     pneumonia     risk factors     surgery for head and neck cancer (SHNC)    

HTML PDF 收藏

Evaluation of the harmonic scalpel in open surgery for abdominal aortic aneurysm

null

《医学前沿（英文）》 2012年 第6卷 第1期   页码 85-88 doi: 10.1007/s11684-012-0174-x

摘要：

The harmonic scalpel is a hemostatic device primarily designed for use in laparoscopic surgery. During the last few years, many surgeons have begun to use the harmonic scalpel in open surgery. Several papers have cited the benefits of the device compared with conventional knot-tying techniques; however, no evidence showing the advantages of using the harmonic scalpel in complicated abdominal aortic aneurysm (AAA) surgery has been presented. The aim of the present study is to determine the value of the harmonic scalpel in open operation for AAA. A total of 153 patients who underwent open surgery for AAA at the Department of Vascular Surgery of Guangdong General Hospital, China between January 2001 and December 2010, were retrospectively analyzed. Open surgery performed with the harmonic scalpel on 105 patients was compared with open operation using conventional knot-tying techniques on 48 patients. The operative time, intraoperative blood loss, total postoperative drainage fluid volumes, hospital stay, and postoperative complications between the two groups were compared. The harmonic scalpel group was associated with a shorter operation time (113.2±23.6 min vs. 232.1±39.2 min, P<0.01) and lower intraoperative blood loss (126.1±96.6 ml vs. 592.1±207.2 ml, P<0.01). Postoperative drainage fluid volumes were greater in the conventional surgery group than in the harmonic scalpel group (702.1±192.8 ml vs. 198.5±97.4 ml, P<0.01). The hospital stay was shorter for the harmonic scalpel group than for the conventional surgery group (10.7±3.3 d vs. 16.5±4.7 d, P<0.05). No differences between the postoperative complications or hospital mortality of the two groups were found. The harmonic scalpel is a safe and minimally invasive tool in open surgery for AAA and is associated with shorter operative time, shorter hospital stay, and lower intraoperative blood loss and postoperative drainage fluid volumes compared with conventional knot-tying techniques.

关键词： abdominal aortic aneurysm     harmonic scalpel     minimally invasive    

HTML PDF 收藏

Development of splenic surgery in China

JIANG Hongchi, ZHAO Xianqi, GAO Yue

《医学前沿（英文）》 2007年 第1卷 第2期   页码 126-129 doi: 10.1007/s11684-007-0024-4

摘要： Splenic surgery has enjoyed rapid progress for the past decades in China. Based on continuously solidifying theories and clinical practice, many advanced concepts with applicable clinical frameworks have been established, thus making splenic surgery an indispensable division in modern surgery. In this study, the authors try to give an overview of the developments in this field. Spleen function is a key issue that generally guides advances in splenic surgery. The old knowledge of the dispensable spleen has been abandoned, while the exact role that it plays in the body continues to be unveiled. Now, standard grading for splenic injury and the respective guidelines for clinical management have been established, with the use of selective instead of indiscriminate splenectomy being accepted by most experts. Various spleen sparing operations have been developed, while many advanced techniques such as laparoscopy have been introduced to splenic surgery. Spleen transplantation has greatly advanced in China, even though there are still many unsolved mysteries in this field. Altogether, splenic surgery is a new and prosperous discipline, and it is a tremendous stage for young surgeons to be part of.

关键词： function     respective     prosperous discipline     knowledge     indispensable division    

HTML PDF 收藏

标题 作者 时间 类型 操作

Lobectomy by video-assisted thoracoscopic surgery (VATS) for early stage of non-small cell lung cancer

null

期刊论文

Guidelines for navigation-assisted spine surgery

Bo Liu, Da He, Yajun Liu, Xiaoguang Han, Jingwei Zhao, Mingxing International Society for Computer AssistedOrthopaedic Surgery

期刊论文

Learning curve of totally thoracoscopic pulmonary segmentectomy

Weibing Wu, Jing Xu, Wei Wen, Yue Yu, Xinfeng Xu, Quan Zhu, Liang Chen

期刊论文

Laparoscopic surgery for pancreatic lesions: current status and future

Taiping Zhang, Xiao Du, Yupei Zhao

期刊论文

A reversibility-gain model for integer Karhunen-Loève transform design in video coding

Xing-guo ZHU,Lu YU

期刊论文

Image analyses for video-based remote structure vibration monitoring system

Yang YANG,Xiong (Bill) YU

期刊论文

Advances in tissue state recognition in spinal surgery: a review

Hao Qu, Yu Zhao

期刊论文

Current progress on natural orifice transluminal endoscopic surgery (NOTES)

null

期刊论文

hepatectomy: comments on “Expert Consensus on Laparoscopic Hepatectomy (2013 Version) by National Hepatic SurgeryGroup, Society of Surgery, Chinese Medical Association”

null

期刊论文

视频分层组织方案和技术

章毓晋,陆海斌

期刊论文

Achievements in burn surgery over the past 50 years in China

WANG Shiliang

期刊论文

Development of lunar regolith composite and structure via laser-assisted sintering

期刊论文

Risk factors for ventilator-associated pneumonia among patients undergoing major oncological surgery

null

期刊论文

Evaluation of the harmonic scalpel in open surgery for abdominal aortic aneurysm

null

期刊论文

Development of splenic surgery in China

JIANG Hongchi, ZHAO Xianqi, GAO Yue

期刊论文