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BACKGROUND Human immunodeficiency virus (HIV) has spread throughout China and to some degree has penetrated the general heterosexual population in some regions. METHODS A cross-sectional survey of 11,461 sexually transmitted disease (STD) clinic attendees in 8 cities in Guangxi, China, was conducted for syphilis and for acute and established HIV(More)
Objective. To study the method for constructing an ultrasonic tele-diagnosis and quality control system. Method. The standard of Intemet/Intranet technology was used for the system. The compression and up-loading component based on wavelet and the software platform of ultrasound image processing were developed to suit the ultrasound image characteristics.(More)
OBJECTIVE To implement dynamic 3D reconstruction of ultrasonic flow images by the technique of 3D reconstruction of ultrasonic medical images combined with Doppler flow imaging method. METHOD Through analyzing the color-coded mode of Doppler flow images and utilizing the Color Bar in DFI provided by ultrasound system, the information of anatomical(More)
The process of liver fibrosis changes the rheological properties of liver tissue. This study characterizes and compares liver fibrosis stages from F0 to F4 in rats in terms of shear viscoelastic moduli. Here two viscoelastic models, the Zener model and Voigt model, were applied to experimental data of rheometer tests and then values of elasticity and(More)
OBJECTIVE To evaluate the clinical and application value of circular stapler in extraperitoneal colostomy. METHODS Retrospective analysis was made to 22 cases that experienced extraperitoneal colostomy with circular stapler from Match 2008 to March 2009 in the department of colon and anal surgery of the first hospital of Jilin University. RESULTS The(More)
A method has been developed to quantitatively analyze sinoatrial nodes (SAN) using Doppler tissue images (DTI). Doppler tissue images of SAN are acquired using an intracardiac catheter via the superior vena cava in an in vivo experiment. A sequence of DTI images of a SAN is obtained, and a complete cycle of the SAN excitation is observed. The tissue(More)
OBJECTIVE To quantitatively analyze the characteristics of regional myocardial velocities of paced heart over His bundle, and explore the myocardial velocity pattern. METHOD 5 dogs were paced at 120 times/min over His bundle. We defined the His bundle adjacent region and the top region of interventricular septum (IVS) as our regions of interest (ROI).(More)
Acquisition of ultrasound images is cheap and noninvasive as it does not require ionizing radiations as compared to other medical imaging techniques but the problem with these images lies in its inherent characteristics like speckle noise and low contrast. In this paper the performance of various image enhancement techniques are compared by applying them on(More)
In this study, a modified topology-adaptive snake (T-snake) is proposed for the segmentation of ultrasound image. The algorithm was improved as follows. First, the image is decomposed in the place which has offset from pixel's position while snake points are in pixel's position. This will reduce the task during calculating intersections between contour and(More)