基于新疆地方性高发病肝包虫病CT图像灰度直方图特征检索方法的研究     

严传波  木拉提·哈米提  陈建军  胡彦婷  孔德伟  李莉  周晶晶 《科技通报》2013,29(3)

新疆地方性肝包虫病是新疆牧区发病率较高的传染性寄生虫病,严重影响牧区各族人民生活质量的提高.根据图像特征,选择合适距离算法,实现快速准确地图像检索,对辅助医生早期发现、诊断和治疗肝包虫病有重大意义.本文研究比较了使用肝包虫病CT医学图像灰度直方图特征进行图像检索时,不同距离算法的有效性.实验结果表明:对于肝包虫病医学图像的基于灰度直方图特征的图像检索,马氏距离算法与标准欧氏距离算法比其他距离算法较优.  相似文献   

Diagnostic accuracy of UriSed automated urine microscopic sediment analyzer and dipstick parameters in predicting urine culture test results     

Ka?an Huysal  Yasemin U. Budak  Ayse Ulusoy Karaca  Murat Aydos  Serdar Kahvecio?lu  Mehtap Bulut  Murat Polat 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(2):211-217

Introduction

Urinary tract infection (UTI) is one of the most common types of infection. Currently, diagnosis is primarily based on microbiologic culture, which is time- and labor-consuming. The aim of this study was to assess the diagnostic accuracy of urinalysis results from UriSed (77 Electronica, Budapest, Hungary), an automated microscopic image-based sediment analyzer, in predicting positive urine cultures.

Materials and methods:

We examined a total of 384 urine specimens from hospitalized patients and outpatients attending our hospital on the same day for urinalysis, dipstick tests and semi-quantitative urine culture. The urinalysis results were compared with those of conventional semi-quantitative urine culture.

Results:

Of 384 urinary specimens, 68 were positive for bacteriuria by culture, and were thus considered true positives. Comparison of these results with those obtained from the UriSed analyzer indicated that the analyzer had a specificity of 91.1%, a sensitivity of 47.0%, a positive predictive value (PPV) of 53.3% (95% confidence interval (CI) = 40.8–65.3), and a negative predictive value (NPV) of 88.8% (95% Cl = 85.0–91.8%). The accuracy was 83.3% when the urine leukocyte parameter was used, 76.8% when bacteriuria analysis of urinary sediment was used, and 85.1% when the bacteriuria and leukocyturia parameters were combined. The presence of nitrite was the best indicator of culture positivity (99.3% specificity) but had a negative likelihood ratio of 0.7, indicating that it was not a reliable clinical test.

Conclusions:

Although the specificity of the UriSed analyzer was within acceptable limits, the sensitivity value was low. Thus, UriSed urinalysis results do not accurately predict the outcome of culture.  相似文献   

The impact of using mobile-supported learning management systems in teaching web design on the academic success of students and their opinions on the course     

Murat Tezer  Burcu Turan Çimşir 《Interactive Learning Environments》2018,26(3):402-410

This research aimed to examine the impact of using mobile-supported learning management systems (LMS) in teaching web design on the academic success of students and their opinion on the course; and it was conducted on 70 volunteer students (35 experimental, 35 control) enrolled at Giresun University, Technical Sciences Vocational School, Computer Technologies Department, Program of Computer Programming in Spring 2015–2016. After the eight weeks long implementation of Mobile Moodle, which is a mobile-supported LMS, as a supplement to traditional learning methods; t-test was used in order to determine whether the methodology mentioned had a significant impact on the academic success of web design teaching. As a result of the t-test implemented; it was seen that there was a significant level of difference in favor of the experimental group; between the academic success of students in the experimental group where mobile-supported LMS is used and the academic success of the students in the control group where traditional learning methodologies are used. Also, it has been determined that using Mobile LMS has increased the students’ interest.  相似文献   

Evaluation of the clinical chemistry tests analytical performance with Sigma Metric by using different quality specifications - Comparison of analyser actual performance with manufacturer data     

Murat Kele 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2022,32(1)

IntroductionThe interest in quality management tools/methodologies is gradually increasing to ensure quality and accurate results in line with international standards in clinical laboratories. Six Sigma stands apart from other methodologies with its total quality management system approach. However, the lack of standardization in tolerance limits restricts the advantages for the process. Our study aimed both to evaluate the applicability of analytical quality goals with Roche Cobas c 702 analyser and to determine achievable goals specific to the analyser used.Materials and methodsThe study examined under two main headings as Sigma_laboratory and Sigma_analyser. Sigma_laboratory was calculated using internal and external quality control data by using Roche Cobas c 702 analyser for 21 routine biochemistry parameters and, Sigma_analyser calculation was based on the manufacturer data presented in the package inserts of the reagents used in our laboratory during the study. Sigma values were calculated with the six sigma formula.ResultsConsidering the total number of targets achieved, Sigma_analyser performed best by meeting all CLIA goals, while Sigma_laboratory showed the lowest performance relative to biological variation (BV) desirable goals.ConclusionsThe balance between the applicability and analytical assurance of “goal-setting models” should be well established. Even if the package insert data provided by the manufacturer were used in our study, it was observed that almost a quarter of the evaluated analytes failed to achieve even “acceptable” level performance according to BV-based goals. Therefore, “state-of-the-art” goals for the Six Sigma methodology are considered to be more reasonable, achievable, and compatible with today’s technologies.  相似文献