textural

纹理
  • 文章类型: Journal Article
    研究用部分或全部碳酸氢钾(PBC)代替三聚磷酸钠(STPP)对还原磷酸银鲤鱼面糊的作用,所有的面糊都是由鲤鱼鱼糜组成的,猪肉背脂肪,冰水,香料,糖,还有氯化钠.其中,样品T1含4g/kgSTPP;T2含1g/kgPBC,3g/kgSTPP;T3含2g/kgPBC,2g/kgSTPP;T4含3g/kgPBC,1g/kgSTPP;T5含4g/kgPBC,它们都是用碗碟刀制作的。pH值的变化,白度,持水和持油能力,凝胶和流变特性,以及蛋白质构象进行了研究。pH值,烹饪产量,持水和持油能力,纹理属性,与不含PBC的样品相比,含PBC的还原磷酸银鲤鱼面糊在90°C的G'值显着增加(p<0.05)。由于pH值的增加和离子强度的增强,形成更多的β-折叠和β-转角结构。此外,通过增加PBC,pH值显着增加(p<0.05),煮熟的silver鱼面糊变黑。同时,产生了更多的二氧化碳,破坏了凝胶结构,领先的持水和持油能力,纹理属性,90°C时的G\'值增加,然后减少。总的来说,使用PBC部分代替STPP,通过增加pH值,改变其流变学特性和蛋白质构象,使还原磷酸银糊状物具有更好的凝胶特性和保水能力。
    To study the use of partial or total potassium bicarbonate (PBC) to replace sodium tripolyphosphate (STPP) on reduced-phosphate silver carp batters, all the batters were composed of silver carp surimi, pork back fat, ice water, spices, sugar, and sodium chloride. Therein, the sample of T1 contained 4 g/kg STPP; T2 contained 1 g/kg PBC, 3 g/kg STPP; T3 contained 2 g/kg PBC, 2 g/kg STPP; T4 contained 3 g/kg PBC, 1 g/kg STPP; T5 contained 4 g/kg PBC, and they were all produced using a bowl chopper. The changes in pH, whiteness, water- and oil-holding capacity, gel and rheological properties, as well as protein conformation were investigated. The pH, cooking yield, water- and oil-holding capacity, texture properties, and the G\' values at 90 °C of the reduced-phosphate silver carp batters with PBC significantly increased (p < 0.05) compared to the sample without PBC. Due to the increasing pH and enhanced ion strength, more β-sheet and β-turns structures were formed. Furthermore, by increasing PBC, the pH significantly increased (p < 0.05) and the cooked silver carp batters became darkened. Meanwhile, more CO2 was generated, which destroyed the gel structure, leading the water- and oil-holding capacity, texture properties, and G\' values at 90 °C to be increased and then decreased. Overall, using PBC partial as a substitute of STPP enables reduced-phosphate silver carp batter to have better gel characteristics and water-holding capacity by increasing its pH and changing its rheology characteristic and protein conformation.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    乳房X线照片中的质量检测对于在重叠的较致密的纤维腺体乳房区域中存在质量的方法有限。此外,不同的乳腺密度水平可能会降低学习系统提取足够的特征描述符的能力,并可能导致较低的准确性。因此,这项研究提出了一种基于纹理的图像增强技术,称为基于空间的乳腺密度增强肿块检测(SbBDEM),以基于乳腺密度水平增强重叠肿块区域的纹理特征。此方法确定图像的最佳曝光阈值对比度下限,并通过选择最佳强度因子来优化参数,该强度因子由分别针对密集和非密集乳房类别的最佳盲/无参考图像空间质量评估器(BRISQUE)评分指导在训练之前。同时,修改后的您只看一次v3(YOLOv3)架构用于质量检测,通过使用增强的图像专门为较浅的检测头分配额外数量的较高价值的锚盒。实验结果表明,在训练质量检测之前使用SbBDEM可以提高平均平均精度(mAP),比未增强的训练图像提高17.24%的质量检测性能,质量分割,准确率为94.41%,良性和恶性肿块分类的准确率为96%。根据乳房密度增强乳房X线照片图像被证明可以提高整个系统的性能,并有助于改进临床诊断过程。
    Mass detection in mammograms has a limited approach to the presence of a mass in overlapping denser fibroglandular breast regions. In addition, various breast density levels could decrease the learning system\'s ability to extract sufficient feature descriptors and may result in lower accuracy performance. Therefore, this study is proposing a textural-based image enhancement technique named Spatial-based Breast Density Enhancement for Mass Detection (SbBDEM) to boost textural features of the overlapped mass region based on the breast density level. This approach determines the optimal exposure threshold of the images\' lower contrast limit and optimizes the parameters by selecting the best intensity factor guided by the best Blind/Reference-less Image Spatial Quality Evaluator (BRISQUE) scores separately for both dense and non-dense breast classes prior to training. Meanwhile, a modified You Only Look Once v3 (YOLOv3) architecture is employed for mass detection by specifically assigning an extra number of higher-valued anchor boxes to the shallower detection head using the enhanced image. The experimental results show that the use of SbBDEM prior to training mass detection promotes superior performance with an increase in mean Average Precision (mAP) of 17.24% improvement over the non-enhanced trained image for mass detection, mass segmentation of 94.41% accuracy, and 96% accuracy for benign and malignant mass classification. Enhancing the mammogram images based on breast density is proven to increase the overall system\'s performance and can aid in an improved clinical diagnosis process.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    热响应性和生物粘附性聚合物之间的协同作用可以导致具有增强的机械和生物粘附性的材料的优化。设计质量可以确保对配方变量的理解和控制。在这种方法中,实验设计已被广泛用作一种重要策略。聚(甲基乙烯基醚-alt-马来酸酐)(PVMMA)是一种生物粘附聚合物,PluronicF127(PF127)显示出热响应性。对这两种聚合物的缔合研究甚少。这项工作的目的是研究机械,由PVMMA和PF127组成的聚合物混合物的生物粘附性和流变性能,以便为生物医学应用选择最佳条件和配方。纹理特性(硬度、可压缩性,粘附性,粘结性和弹性),柔软度指数,生物粘附和流变特性(流动和粘弹性)表明,17.5-20%(w/w)PF127-聚合物混合物显示出改善的参数值。然而,流变相互作用参数显示出低协同作用,由于聚合物的特性和系统组织。该制剂显示出适合给药的胶凝温度,主要在34°C下具有改善的生物粘附性能,并表明该制剂可用于生物医学应用。DoE构成了研究这些系统的重要工具,这些系统显示了显着影响二元混合物的主要作用。
    The synergism between thermoresponsive and bioadhesive polymers can lead to the optimization of materials with enhanced mechanical and bioadhesive properties. Quality by Design can assure the understanding and control of formulation variables. In this approach, Design of Experiment has been widely utilized as an important strategy. Poly(methyl vinyl ether-alt-maleic anhydride) (PVMMA) is a bioadhesive polymer and Pluronic F127 (PF127) shows thermoresponsiveness. The association of these two polymers has been poorly investigated. The aim of this work was to study the mechanical, bioadhesive and rheological properties of polymer mixtures composed of PVMMA and PF127, in order to select the best conditions and formulations for biomedical applications. Textural properties (hardness, compressibility, adhesiveness, cohesiveness and elasticity), softness index, bioadhesion and rheological characteristics (flow and viscoelasticity) showed that 17.5-20% (w/w) PF127-polymer mixtures displayed improved values of the parameters. However, the rheological interaction parameter showed low synergism, due to the polymers\' characteristics and system organization. The formulations displayed gelation temperatures suitable for administration, with improved bioadhesive properties mainly at 34 °C and suggests the formulations can be used for biomedical applications. DoE constituted an important tool to investigate these systems showing the main effects that significantly influence the binary mixtures.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    背景:根据中国卫生委员会指南,2019年冠状病毒病(COVID-19)的严重程度被归类为轻度,中度,严重,或批判。COVID-19在重症和危重症患者中的死亡率较高;因此,早期发现COVID-19可预防疾病进展并提高患者生存率.计算机断层扫描(CT)影像组学,作为一种机器学习方法,提供了对COVID-19肺炎的客观和数学评估。由于基于CT的影像组学研究最近集中在COVID-19诊断和严重程度分析上,本荟萃分析旨在研究基于CT的影像组学模型在确定COVID-19严重程度方面的预测能力.
    方法:本研究遵循PRISMA指南的诊断版本。PubMed,Embase数据库和Cochrane中央对照试验登记册,并搜索了Cochrane系统评价数据库,以识别从开始到2021年7月16日的荟萃分析中的相关文章。使用森林地块分析敏感性和特异性。使用汇总接收器工作特性曲线计算总预测能力。使用漏斗图评估偏倚。使用影像组学质量评分和诊断准确性研究工具的质量评估评估纳入的文献的质量。
    结果:影像组学质量评分范围为7至16(可达到的评分:22128至36)。合并的敏感性和特异性分别为0.800(95%置信区间[CI]0.662-0.891)和0.874(95%CI0.773-0.934),分别。接收器工作特征曲线下的汇集面积为0.908。质量评估工具显示出良好的结果。
    结论:这项荟萃分析表明,基于CT的影像组学模型可能有助于预测COVID-19肺炎的严重程度。
    BACKGROUND: According to the Chinese Health Commission guidelines, coronavirus disease 2019 (COVID-19) severity is classified as mild, moderate, severe, or critical. The mortality rate of COVID-19 is higher among patients with severe and critical diseases; therefore, early identification of COVID-19 prevents disease progression and improves patient survival. Computed tomography (CT) radiomics, as a machine learning method, provides an objective and mathematical evaluation of COVID-19 pneumonia. As CT-based radiomics research has recently focused on COVID-19 diagnosis and severity analysis, this meta-analysis aimed to investigate the predictive power of a CT-based radiomics model in determining COVID-19 severity.
    METHODS: This study followed the diagnostic version of PRISMA guidelines. PubMed, Embase databases and the Cochrane Central Register of Controlled Trials, and the Cochrane Database of Systematic Reviews were searched to identify relevant articles in the meta-analysis from inception until July 16, 2021. The sensitivity and specificity were analyzed using forest plots. The overall predictive power was calculated using the summary receiver operating characteristic curve. The bias was evaluated using a funnel plot. The quality of the included literature was assessed using the radiomics quality score and quality assessment of diagnostic accuracy studies tool.
    RESULTS: The radiomics quality scores ranged from 7 to 16 (achievable score: 2212 8 to 36). The pooled sensitivity and specificity were 0.800 (95% confidence interval [CI] 0.662-0.891) and 0.874 (95% CI 0.773-0.934), respectively. The pooled area under the receiver operating characteristic curve was 0.908. The quality assessment tool showed favorable results.
    CONCLUSIONS: This meta-analysis demonstrated that CT-based radiomics models might be helpful for predicting the severity of COVID-19 pneumonia.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    世界卫生组织冠状病毒(COVID-19)普遍的健康困境宣布了这场大流行。任何有助于快速检测冠状病毒并具有巨大识别率的科学器具对医生来说都可能过于富有成果。在这种环境下,创新的自动化,如深度学习,机器学习,图像处理和医学图像,如胸部X线摄影(CXR),与COVID-19相反,计算机断层扫描(CT)已成为有希望的解决方案。目前,逆转录-聚合酶链反应(RT-PCR)检测已被用于检测冠状病毒.由于暂停期较高,测试结果和大量假阴性估计,需要替代解决方案。因此,提出了一种基于机器学习的自动算法,用于检测COVID-19和对9个不同数据集的分级。这项研究影响了图像处理和机器学习的授权,以使用CXR和CT医学成像进行快速和明确的冠状病毒检测。这导致早期检测,诊断,并尽早治愈COVID-19。首先,通过归一化对图像进行预处理,以提高图像质量并去除噪声。其次,图像的分割是通过模糊c均值聚类来完成的。然后各种功能,即,统计,纹理,梯度直方图,和离散小波变换被提取(92)并通过主成分分析从特征向量中选择。最后,k-NN,SRC,ANN,支持向量机用于为正常情况做出决策,肺炎,COVID-19阳性患者。该系统的性能已通过k(5)折交叉验证技术进行了验证。所提出的算法达到91.70%(k-最近邻),94.40%(稀疏表示分类器),96.16%(人工神经网络),99.14%(支持向量机)用于COVID检测。结果表明,通过机器学习和图像处理技术,特征组合和选择可以在14.34s内提高性能。在k-NN中,SRC,ANN,和SVM分类器,SVM显示出更有效的结果,这些结果很有希望,并且可以与文献进行比较。与文献综述相比,所提出的方法提高了识别率。因此,提出的算法显示出巨大的潜力,有利于他们的发现放射科医师。此外,在先前的病毒诊断中卓有成效,并将肺炎与COVID-19和其他大流行区分开来。
    The pandemic was announced by the world health organization coronavirus (COVID-19) universal health dilemma. Any scientific appliance which contributes expeditious detection of coronavirus with a huge recognition rate may be excessively fruitful to doctors. In this environment, innovative automation like deep learning, machine learning, image processing and medical image like chest radiography (CXR), computed tomography (CT) has been refined promising solution contrary to COVID-19. Currently, a reverse transcription-polymerase chain reaction (RT-PCR) test has been used to detect the coronavirus. Due to the moratorium period is high on results tested and huge false negative estimates, substitute solutions are desired. Thus, an automated machine learning-based algorithm is proposed for the detection of COVID-19 and the grading of nine different datasets. This research impacts the grant of image processing and machine learning to expeditious and definite coronavirus detection using CXR and CT medical imaging. This results in early detection, diagnosis, and cure for the accomplishment of COVID-19 as early as possible. Firstly, images are preprocessed by normalization to enhance the quality of the image and removing of noise. Secondly, segmentation of images is done by fuzzy c-means clustering. Then various features namely, statistical, textural, histogram of gradients, and discrete wavelet transform are extracted (92) and selected from the feature vector by principle component analysis. Lastly, k-NN, SRC, ANN, and SVM are used to make decisions for normal, pneumonia, COVID-19 positive patients. The performance of the system has been validated by the k (5) fold cross-validation technique. The proposed algorithm achieves 91.70% (k-Nearest Neighbor), 94.40% (Sparse Representation Classifier), 96.16% (Artificial Neural Network), and 99.14% (Support Vector Machine) for COVID detection. The proposed results show feature combination and selection improves the performance in 14.34 s with machine learning and image processing techniques. Among k-NN, SRC, ANN, and SVM classifiers, SVM shows more efficient results that are promising and comparable with the literature. The proposed approach results in an improved recognition rate as compared to the literature review. Therefore, the algorithm proposed shows immense potential to benefit the radiologist for their findings. Also, fruitful in prior virus diagnosis and discriminate pneumonia between COVID-19 and other pandemics.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Pubmed)

  • 文章类型: Journal Article
    本研究首次研究了臭氧诱导氧化对蛋黄凝胶特性的影响。纹理属性,保水能力,臭氧化后鸡蛋黄凝胶(CEYG)的蒸煮损失率和色泽均有明显改善。在臭氧化20分钟时达到最大硬度值(976.04g),比天然组高134.92g。此外,臭氧处理的蛋黄显示羰基含量增加58.47%,游离巯基减少44.33%。低场核磁共振结果表明,臭氧促进了CEYG中自由水向非流动水的转化。扫描电子显微镜表明,适度的臭氧处理导致更有规律的,CEYG连续平滑的网络结构。这些结果为应用臭氧提高热诱导CEYG的性能提供了理论依据。
    The impact of ozone-induced oxidation on the gel properties of egg yolk was investigated for the first time in this research. The textural properties, water-holding capacity, cooking loss rate and color of the chicken egg yolk gel (CEYG) were significantly improved after ozonation. The maximum hardness value (976.04 g) was reached at 20 min of ozonation and it was 134.92 g higher than that of the natural group. Additionally, the ozone-treated yolk showed an increase of 58.47% in carbonyl content and a decrease of 44.33% in free sulfhydryl groups. The results of low-field nuclear magnetic resonance indicated that ozone promoted the conversion of free water to non-flowing water in the CEYG. Scanning electron microscopy represented that the moderate ozone treatment resulted in a more regular, continuous and smooth network structure of the CEYG. These results provided a theoretical basis for the application of ozone to improve the performance of heat-induced CEYG.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Journal Article
    The domain of investigation of radiomics consists of large-scale radiological image analysis and association with biological or clinical endpoints. The purpose of the present study is to provide a recent update on the status of this rapidly emerging field by performing a systematic review of the literature on radiomics, with a primary focus on oncologic applications. The systematic literature search, performed in Pubmed using the keywords: \"radiomics OR radiomic\" provided 97 research papers. Based on the results of this search, we describe the methods used for building a model of prognostic value from quantitative analysis of patient images. Then, we provide an up-to-date overview of the results achieved in this field, and discuss the current challenges and future developments of radiomics for oncology.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

  • 文章类型: Journal Article
    背景:假性进展(PSP)的及时检测对于高级别神经胶质瘤(HGG)患者的治疗至关重要,但仍然很困难。O-(2-[18F]氟乙基)-L-酪氨酸正电子发射断层扫描(FET-PET)的结构特征反映了肿瘤的摄取异质性;其中一些可能与肿瘤进展有关。
    方法:14例疑似PSP的HGG患者接受了FET-PET显像。对一组19个常规和纹理FET-PET特征进行了评估,并进行了无监督的共识聚类。真正进展的最终诊断与PSP基于使用RANO标准的随访MRI。
    结果:已经基于10个主要的纹理FET-PET特征确定了三个稳健的簇。PSP患者均未落入第2组,这与摄取异质性的纹理FET-PET标志物的高值相关。4名PSP患者中有3名被分配到第3组,这在很大程度上与纹理FET-PET特征的低值相关。相比之下,在最佳截止值2.1时,肿瘤与正常脑比率(TNRmax)对PSP的预测较低(检测真实进展的阴性预测值为57%,p=0.07vs.75%,簇3,p=0.04)。
    结论:基于结构O-(2-[18F]氟乙基)-L-酪氨酸PET特征的聚类可能为评估伪进展的难以捉摸的现象提供有价值的信息。
    BACKGROUND: Timely detection of pseudoprogression (PSP) is crucial for the management of patients with high-grade glioma (HGG) but remains difficult. Textural features of O-(2-[18F]fluoroethyl)-L-tyrosine positron emission tomography (FET-PET) mirror tumor uptake heterogeneity; some of them may be associated with tumor progression.
    METHODS: Fourteen patients with HGG and suspected of PSP underwent FET-PET imaging. A set of 19 conventional and textural FET-PET features were evaluated and subjected to unsupervised consensus clustering. The final diagnosis of true progression vs. PSP was based on follow-up MRI using RANO criteria.
    RESULTS: Three robust clusters have been identified based on 10 predominantly textural FET-PET features. None of the patients with PSP fell into cluster 2, which was associated with high values for textural FET-PET markers of uptake heterogeneity. Three out of 4 patients with PSP were assigned to cluster 3 that was largely associated with low values of textural FET-PET features. By comparison, tumor-to-normal brain ratio (TNRmax) at the optimal cutoff 2.1 was less predictive of PSP (negative predictive value 57% for detecting true progression, p=0.07 vs. 75% with cluster 3, p=0.04).
    CONCLUSIONS: Clustering based on textural O-(2-[18F]fluoroethyl)-L-tyrosine PET features may provide valuable information in assessing the elusive phenomenon of pseudoprogression.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

    求助全文

  • 文章类型: Journal Article
    在本研究中,植物甾醇(具有低胆固醇血症作用)已用于加工干酪酱(PCS)中以增强其功能,并且已在三种不同的添加水平(2%,3%和4%)。关于纹理属性,与对照相比,在添加3%和4%植物甾醇时PCS的硬度显著(p<0.05)更高。与对照相比,所有掺入植物甾醇的干酪涂抹样品在剪切作用方面显著更高(p<0.05)。当奶酪中植物甾醇的添加水平从0%增加到4%时,一个锋利的,注意到粘附功稳定且显着(p<0.05)下降。与对照相比,所有掺入植物甾醇的干酪涂抹样品的RVA™干酪熔体粘度指数显著(p<0.05)较低。
    In the present study phytosterols (have hypocholesterolemic effect) have been used in processed cheese spread (PCS) to enhance its functionality and its effect on textural and melting properties have been evaluated at three different levels of addition (2%, 3% and 4%). On textural attributes, the firmness of the PCS at 3% and 4% of phytosterols addition were significantly (p<0.05) higher as compared to the control. All the phytosterols incorporated cheese spread samples were significantly higher (p<0.05) in work of shear as compared to the control. As the levels of phytosterols addition were increased in cheese spread from 0 to 4%, a sharp, steady and significant (p<0.05) decrease in work of adhesion was noticed. The RVA™ cheese melt viscosity index of all the phytosterols incorporated cheese spread samples were significantly (p<0.05) lower as compared to the control.
    导出

    更多引用

    收藏

    翻译标题摘要

    我要上传

       PDF(Sci-hub)

公众号