2.Medical waveform format encoding rules (MFER)--analysis and implementation.
Chinese Journal of Medical Instrumentation 2006;30(5):359-362
There is not yet a universally acknowledged standard for all kinds of general medical waveform format encoding. Medical Waveform Format Encoding Rules (MFER) presented by Japanese IS&C Committee can parse and describe all kinds of routine medical waveform data. In this paper, MFER's working out, its present situation and characters are expatiated and MFER rules are interpreted in detail. MFER, medical waveform, standard
Algorithms
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Automatic Data Processing
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standards
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Signal Processing, Computer-Assisted
3.Effect of fluvastattn on extracelluar signal-regulated kinase activity in glomerular mesangial cells exposed to high glucose concentration
Ying LI ; Hui-Jun DUAN ; Tao ZHANG ; Li-Hong ZHANG ; Mao-Dong LIU ; Xiu-Fen WANG ; Qiong-Zhen LIN ;
Chinese Journal of Endocrinology and Metabolism 2001;0(05):-
When the glomerular mesangial cells of rats were cultured in vitro at high glucose concentration,the activity of extraeellular signal-regulated kinase(ERK),the expression of transforming growth factor-?_1(TGF-?_1)mRNA and the content of typeⅣcollagen in the supematant were higher than those at normal glucose concentration.These effects were inhibited by fluvastatin.The results showed that the activation of ERK signal transduction pathways appeared to play a role in the onset and progression of diabetic nephropathy. Furthermore,fluvastatin could protect the kidney by inhibiting ERK signal transduction pathway and TGF-?_1 expression.
4.Lossless ECG hybrid compression method based on JPEG 2000.
Ying-Ying LU ; Hui-Long DUAN ; Xu-Dong LU
Chinese Journal of Medical Instrumentation 2008;32(4):246-295
After a study on the characteristic of ECG data, we propose here in this paper a lossless compression method of ECG data, which is based on JPEG2000. It integrates both 1D and 2D compression. The method has been verified through all forty-eight records in MIT-BIH Arrhythmia database. And the result shows that the method has a better compression rate and a good computational efficiency.
Algorithms
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Electrocardiography
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methods
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Image Processing, Computer-Assisted
5.Central Blood Pressure and the Extent of Coronary Artery Disease
Yuan-Yuan DUAN ; Hui-Liang LIU ; Dong-Xing MA ; Sheng-Li YANG ; Jian-Ping LUO ; Ying LIU ; Wei HAN ;
Chinese Journal of Hypertension 2006;0(10):-
50%.The patients were categorized into as:one-,two-, and three-vessels coronary artery disease group.Central aortic SBP and DBP was measured by cathetarization dur- ing angiography of coronary artery and brachial blood pressure was measured using cuff method.Results Periph- eral SBP,PP and ascending aortic SBP,PP,fractional systolic pressure(FSP=SBP/MAP)were increased and as cending aortic fractional diastolic pressure(FDP=DBP/MAP)was reduced when the diseased coronary vessels were increased(P
6.Effect of tube voltage on digital chest radiograph for phantom and occupational exposed workers.
Xiao-hua WANG ; Dong-sheng LIU ; Xiao XUAN ; Han KANG ; Jiang-hui DUAN ; Hui-shu YUAN
Chinese Journal of Industrial Hygiene and Occupational Diseases 2013;31(9):671-674
OBJECTIVETo explore the image quality of different tube voltage on digital chest radiograph for contrast detail phantom (CDRAD2.0) and occupational exposed workers.
METHODSThe CDRAD2.0 phantom DR images of high KV and different tube voltages were analyzed by 3 readers, image quality figure (IQF) were calculated and compared; at the same time 136 exposed workers were examined with high-kV and DR chest radiograph of different tube voltages. Contrast to high-KV images, 10 anatomic sites were scored .The image differences were compared between DR and high-kV.
RESULTSOn CDRAD2.0 phantom, the IQF value of DR images in 3 readers were minimum in the condition of 120 kV, average value was 22.25. The analysis of variance in model with random effects, the mean IQF value of different tube voltage DR image had a significant difference (F = 13.775, P<0.01); By Dunnett t-tests analysis, the mean IQF value of DR image in 120 kV and high kilovoltage had no difference (t = -0.58, P = 0.979); On clinical cases, the DR image of 120 kV showed the closest anatomy to the high KV, the mean had no significant difference with 0 (P > 0.05) with single sample t test.
CONCLUSIONOn the CDRAD2.0 phantom or clinical exposed workers, the DR image quality of 120 kV tube voltage equals to high-KV basically.
Adult ; Aged ; Dust ; Female ; Humans ; Male ; Middle Aged ; Occupational Exposure ; Radiographic Image Enhancement ; instrumentation ; methods ; Radiography, Thoracic ; instrumentation ; methods
7.Small incision decompression in surgical treatment of leg fracture.
Xin-Gong LIU ; Yi-Ting HAN ; Qun-Li DUAN-MU ; Hong ZHU ; Dong-Hui HUANG ; Qi-Hui ZHAO
China Journal of Orthopaedics and Traumatology 2008;21(5):372-373
Adult
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Aged
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Aged, 80 and over
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Decompression, Surgical
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Female
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Fractures, Bone
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complications
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surgery
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Humans
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Leg Injuries
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complications
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surgery
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Male
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Middle Aged
9.Effect of two different desensitizers on bond strength of dentin bonding agents.
Yun-Dong YANG ; Hui-Juan XIAO ; Yin-Ling DUAN ; Cui HUANG ; Yi-Ning WANG ; Xiang-Rong CHENG
Chinese Journal of Stomatology 2008;43(6):356-359
OBJECTIVETo evaluate the bond strength of total-etch or self-etch dentin bonding agents after using two different dentin desensitizers on exposed dentin and investigate the bond interface by scanning electron microscope (SEM).
METHODSThirty intact and non-carious human third molars were used. The occlusal enamel was removed with the use of a slow-speed saw under water cooling. These teeth were divided into three groups using a table of random numbers with 10 teeth each. These three groups were treated with water (Group C), UltraEZ (Group U) and MI Paste (Group M) respectively. Then 10 teeth from each group were divided into A subgroup (n = 5) bonded with Single Bond 2 adhesive system and B subgroup (n = 5) bonded with Xeno III adhesive system according to manufacturers' instructions. A block of composite resin was build up to 4-5 mm. All the teeth were sectioned occluso-gingivally to obtain bar-shaped specimens with bonded surface area about 0.9 mm x 0.9 mm. The tension of the sample was tested by a microtensile tester at 1 mm/min. The mean values of bond strength were compared using one-way ANOVA. Three samples were chosen randomly from each of six groups for SEM investigation.
RESULTSThere were no significant differences between Group U and Group C both in A and B subgroups. While there were significant differences between Group M and Group C in two bonding-agent subgroups. For SEM, the hybrid layer was thin and dense in six groups. Both total-etch and self-etch bonding systems could get fair resin tag infiltration in Group C and Group U. In Group M, the resin tags were relatively shorter and fewer than the anterior mentioned two groups.
CONCLUSIONSUltraEZ had no effect on bond strength of both kinds of dentin bonding agents, while MI paste could diminish bond strength.
Bisphenol A-Glycidyl Methacrylate ; chemistry ; Dental Materials ; Dental Stress Analysis ; Dentin-Bonding Agents ; chemistry ; Humans ; Materials Testing ; Molar, Third ; Nitrates ; chemistry ; Potassium Compounds ; chemistry
10.Consistent presentation of medical images based on CPI integration profile.
Tao JIANG ; Ji-ye AN ; Zhong-yong CHEN ; Xu-dong LU ; Hui-long DUAN
Chinese Journal of Medical Instrumentation 2007;31(6):400-403
Because of different display parameters and other factors, digital medical images present different display states in different section offices of a hospital. Based on CPI integration profile of IHE, this paper implements the consistent presentation of medical images, and it is helpful for doctors to carry out medical treatments of teamwork.
Computer Simulation
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Diagnostic Imaging
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Integrated Advanced Information Management Systems
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Medical Informatics Computing
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standards