ABSTRACT
Because the translation hypothesis of optical flow method can not accurately describe the form of motion after tissue compression, so we proposed a new ultrasonic elastic imaging algorithm. It was assumed that the deformation of the tissue was affine transformation when the probe was pressed to the tissue, and the displacement and strain distribution were estimated simultaneously by the optical flow method combined with the prior estimation. In order to verify the effectiveness of the algorithm, the imaging quality of the algorithm and the other imaging algorithm were compared with the simulated radio frequency echo signal. The results show that the new algorithm is higher in signal to noise ratio (SNRe), contrast to noise ratio (CNRe) and running speed than the contrast algorithm under 8% compression. The results show that the new proposed algorithm can effectively estimate axial displacement and axial strain in the case of large compression.
Subject(s)
Algorithms , Elasticity Imaging Techniques , Phantoms, Imaging , Signal-To-Noise Ratio , Stress, MechanicalABSTRACT
Objective To compare the effects of different methods of getting out of bed for the first time in patients receiving lumbar disc herniation operations.Methods Totally 60 patients receiving lumbar disc herniation operations were divided into the experimental group and the control group with 30 patients in each group.The patients in the experimental group got out of bed with prone position.The patients in the control group got out of bed with lateral position.The pain scores and degrees of comfort were recorded.Results The experimental group scored 5.4±1.3 in pain degree,and the control group scored 6.1±1.8,t=0.37,P ＞ 0.05,the difference was not significantly different.The experimental group scored 85.7±10.9 in comfort degree,and the control group scored 70.6±11.5,t=4.21,P ＜ 0.05,the difference was significantly different.Conclusions The method of getting out of bed with prone position can reduce negative emotions of patients receiving lumbar disc herniation operations and improve degrees of comfort.
ABSTRACT
Objective To study the effects of Multi-Walled Carbon Nanotube with different doses on the cellular proliferation of human embryo kidney 293 cells.Methods The cultured human embryo kidney cell line 293 was seeded into 96-well plates and various concentrations of Multi-Walled Carbon Nanotube were added into different groups of culture.Methyl thiazolyl tetrazolium(MTT)assay were applied to detect the cellular viabilities after being incubated with Multi-Walled Carbon Nanotube for 48 hours and the results were calculated with specific static software to protract the cell viability curve.Results The Multi-Walled Carbon Nanotube had different effects of inhibiting the multiplies of 293 cells depending on its concentrations.In addition,when the concentration of Multi-Walled Carbon Nanotube reached over 0.5ug/ml,the inhibition became significantly.Conclusions Multi-Walled Carbon Nanotube can penetrate the cell membrane of 293 cells to influence the activities of cells and the ability of proliferation will be decreased significantly when the concentration came to some degree.Therefore,the safety dosage of the Multi-Walled Carbon Nanotube on human normal embryo kidney 293 cells were estimated in this research.