Image interpolation is often required during medical image processing and analysis. Although interpolation method based on Gaussian radial basis function (GRBF) has high precision, the long calculation time still limits its application in field of image interpolation. To overcome this problem, a method of two-dimensional and three-dimensional medical image GRBF interpolation based on computing unified device architecture (CUDA) is proposed in this paper. According to single instruction multiple threads (SIMT) executive model of CUDA, various optimizing measures such as coalesced access and shared memory are adopted in this study. To eliminate the edge distortion of image interpolation, natural suture algorithm is utilized in overlapping regions while adopting data space strategy of separating 2D images into blocks or dividing 3D images into sub-volumes. Keeping a high interpolation precision, the 2D and 3D medical image GRBF interpolation achieved great acceleration in each basic computing step. The experiments showed that the operative efficiency of image GRBF interpolation based on CUDA platform was obviously improved compared with CPU calculation. The present method is of a considerable reference value in the application field of image interpolation.
Algorithms ; Image Processing, Computer-Assisted ; Imaging, Three-Dimensional ; Normal Distribution ; Software

To search the statistical approaches for evaluating and dealing with the center effects in multi-center clinical trial. Breslow-Day test was used for evaluating the differences of the virtual rating among the centers whose responses were binary, Cochran-Mantel-Haenszel test for dealing with the center effects whose responses were binary or ordinal, and logistic regression for evaluating and dealing with the center effects simultaneously. The results showed that Breslow-Day test is invalid in evaluating the center effects whose response is ordinal, and Cochran-Mantel- Haenszel test can not be used for dealing with the effects of other covariates meanwhile.

To solve the problem of traditional K-means clustering in which initial clustering centers are selected randomly, we proposed a new K-means segmentation algorithm based on robustly selecting 'peaks' standing for White Matter, Gray Matter and Cerebrospinal Fluid in multi-peaks gray histogram of MRI brain image. The new algorithm takes gray value of selected histogram 'peaks' as the initial K-means clustering center and can segment the MRI brain image into three parts of tissue more effectively, accurately, steadily and successfully. Massive experiments have proved that the proposed algorithm can overcome many shortcomings caused by traditional K-means clustering method such as low efficiency, veracity, robustness and time consuming. The histogram 'peak' selecting idea of the proposed segmentootion method is of more universal availability.
Algorithms ; Brain ; anatomy & histology ; Cluster Analysis ; Humans ; Magnetic Resonance Imaging ; Neuroimaging

Cardiovascular Diseases ; therapy ; Humans ; Medicine, Chinese Traditional ; Phytotherapy

Objective To investigate the lipidemia of patients with coronary artery disease(CAD)in China.Methods The survey engaged 52 centers in 7 cities in China recruiting patients with coronary artery disease in a hospital-based setting.Each center was asked to recruit all hospitalized patients with CHD from 1-Jun-2005 to 31-Sep-2005.The study population consisted of 3513 patients with CAD.Results Of the 3513 patients,the prevalence of the lipidemia was 79.7%.And the prevalence of the lipidemia in

Objective To explore the relationship between big-five personality,and public mood of volunteers,and to find out the moderator effect of justice sensitivity.Methods A total of 1 022 volunteers were investigated.The Big-Five Inventory (BFI),Public Mood Scale (PMS),Justice Sensitivity Inventory (JSI) were applied to all subjects.Results The average score was (19.77±4.49) for extraversion,(26.69± 4.13) for agreeableness,(23.33±5.37) for conscientiousness,(12.49±4.91) for neuroticism,(24.95±5.44)for openness,(8.78±3.23) for positive public mood,(3.46±3.06) for negative public mood and correlated with (26.85± 10.55) for observer sensitivity.The extraversion,agreeableness,conscientiousness and openness were correlated with positive public mood(β=0.31,P＜0.01;β=0.25,P＜0.01;β=0.29,P＜0.01;β=0.26,P＜0.0 1),and negatively correlated with public mood (β=-0.14,P＜0.01;β=-0.29,P＜0.01;β=-0.20,P＜0.01;β=-0.08,P＜0.01).Neuroticism was negatively correlated with positive public mood (β=-0.27,P＜0.01),and positively correlated with negative public mood (β=0.31,P＜0.01).The interaction effect of agreeableness and observer sensitivity negatively correlated with positive public mood,negative public mood (β=-0.09,P＜0.01;β=-0.07,P＜0.05).The interaction effect of neuroticism and observer sensitivity was positively correlated with positive public mood (β=0.08,P＜0.01).Conclusion Observer sensitivity plays a regulative role between big-five personality and mental health,and can slow the negative impact of low agreeableness to positive public mood,strengthen the impact of low agreeableness to negative public mood,and slow the negative impact of high neuroticism to positive public mood.

AIM: To investigate the significance of optical coherence tomography ( OCT ) and fundus fluorescein angiography ( FFA) in patients with high myopia macular degeneration.
●METHODS:A total of 62 cases ( 104 eyes ) of high myopia macular degeneration patients with OCT and FFA data from Department of Ophthalmology in Jan. 2014 to Sep. 2015 were retrospectively analyzed.
● RESULTS: Highly myopic macular degeneration patients with FFA type, OCT classification had significant correlation (r=0. 599, P<0. 001). Type of OCT in patients with high myopia macular degeneration, with BCVA, diopter, axial length, the thickness at the central fovea measured value difference has statistically significant ( P<0. 05). The higher OCT classification, the lower BCVA, the smaller center of foveal thickness and diopter value and the longer axial length in patients. ln degrees of myopia macular degeneration patients with FFA type, the patients with BCVA, diopter, eye axis length determination of value differences were statistically significant (P<0. 05). Foveal thickness difference of no statistically significant (P>0. 05). The higher FFA type, the smaller ametropia degree, BCVA values, the longer ocular axial length. FFA type patients with foveal thickness determination values were not statistically significant (P>0. 05).
● CONCLUSION: High myopic macular degeneration patients with OCT and FFA results have a certain degree of correlation. However, it′s benefit to combine both of them for further diagnosed and treatment of patients.

Objective:To evaluate the clinical efficacy between preparation porcelain veneer(PPV)and no-preparation porcelain veneer(NPPV).Methods:44 patients with 97 PPVs and 23 patients with 57 NPPVs were followed up for 3 years.Mental tension, postoperative dentin sensitivity and satisfaction of the patients,survival rate of the veneers,sulcus bleeding index(SBI)of preopera-tive and postoperative 3 years were evaluated.A comparative analysis was taken to examine the clinical indicators of 2 groups accord-ing to the modified CDA /Ryge criteria.Results:Survival rates of PPVs and NPPVs were 96.91 % and 96.49%(P >0.05),satisfac-tion rates of the 2 group patients were 95.45% and 95.65%(P >0.05),respectively.Mental tension and the postoperative dentin sensitivity of patients in PPV group was higher than those in NPPV group.Preoperative and postoperative SBI were not statistically dif-ferent between the 2 groups(P >0.05).Marginal adaptation in PPV group was better than that in NPPV group.Color matching, Porcelain surface and Marginal stain were not statistically different between 2 groups.Conclusion:Preparation porcelain veneers and no-preparation porcelain veneers both are effective in clinical application.

Objective To compare the effects of intramuscular or subcutaneous forearm parathyroid autotransplantation after total parathyroidectomy on patients with renal hyperparathyroidism.Methods From Jan.2012 to Dec.2013,total parathyroidectomy was carried out in 90 patients with renal hyperparathyroidism.According to the location of their parathyroid autograft,patients were divided into intramuscular group (n =39)and subcutaneous group(n =51).One patient in the intramuscular group and two in the subcutaneous group were excluded for the high levels of intact parathyroid hormone (iPTH) the day after operation.iPHT was analyzed 2 weeks,1 month,3 and 6 months after surgery.Results The time of autotransplantation was significantly shorter in subcutaneous group than in intramuscular group (11.46 (2.63) min vs 22.12 (3.78) min;t =0.632,P ＜ 0.05).iPTH levels were significantly lower in subcutaneous group than in intramuscular group 2 weeks after operation (P ＜ 0.05).There was no significant difference between the 2 groups regarding iPTH levels at 1 month,3 or 6 months after surgery.In the follow-up one patient in intramuscular group and one in subcutaneous group had graft-dependent hyperparathyroidism.Conclusion As compared to intramuscular parathyroid autotransplantation,subcutaneous parathyroid autotransplantation has advantages of simpler to operate,shorter autoimplantation time and easier to autograftectomy.

Objective To evaluate the effect of preoperative aescuven forte tablets in the prevention of procedure for prolapse and hemorrhoids(PPH) complications.Methods One hundred and seventy-nine patients underwent PPH in the Erlonglu Hospital of Beijing from June 2013 to June 2014 were divided into postoperative aescuven forte tablets group (n =90) and preoperative aescuven forte tablets group (n =89).The postoperative pain,bleeding,retention of urine,anal swelling,length of stay in hospital and recurrence were compared between the two groups.Results The incidence of postoperative pain,bleeding,retention of urine,anal swelling were lower than in the preoperative aescuven forte tablets group (pain after operations rate:7.9％ (7/89) vs.20.0％ (18/90),x2 =5.484,P＜ 0.05;Wound bleeding:0 vs.6.7 ％ (6/90),P =0.026;retention of urine:9.0％ (8/89) vs.20.0％(18/90),x2 =4.370,P＜0.05;anal swelling:1.1％(1/89) vs.8.9％(8/90),P=0.035),and length of stay in hospital was shorter(11.9±3.9) d vs.(13.3 ±5.0) d,t=3.134,P＜0.05).There was no recurrence both of two groups follow up for more than 2 months.Conclusion Preoperative oral aescuven forte tablets of 2 h can reduce PPH complications and worthy of popularization and application.