Micron and Microscopica Acta最新文献_第10页

The quantitation of gold-labelled macromolecules on cell surfaces by X-ray microanalysis x射线显微分析细胞表面金标记大分子的定量

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90060-Q

Non Thomas, Iolo ap Gwynn

引用次数: 1

Characterization of the interface and intermediate layers of TiN/Ti/substrates systems TiN/Ti/衬底系统界面和中间层的表征

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90143-2

E.O. Ristolainen, K.A. Pischow

引用次数: 0

Computer simulated benchmarks of synthetic aperture techniques for vascular ultrasonography 血管超声合成孔径技术的计算机模拟基准

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90025-9

L. Capineri , G. Castellini , L. Masotti , S. Rocchi

{"title":"Computer simulated benchmarks of synthetic aperture techniques for vascular ultrasonography","authors":"L. Capineri , G. Castellini , L. Masotti , S. Rocchi","doi":"10.1016/0739-6260(92)90025-9","DOIUrl":"10.1016/0739-6260(92)90025-9","url":null,"abstract":"<div><p>Ultrasound investigations and related techniques strongly depend on the imaged structure: in particular our attention is focused on vascular ultrasound imaging. In this work a high-resolution imaging technique for vascular ultrasound diagnosis has been developed, with emphasis on the investigation of the carotid vessel. This application is relevant due to the stroke risk factor associated with pathological situations. Our study envisages the possibility of more accurate measurements of the lesion's extent by the application of a synthetic aperture imaging technique. An imaging system based on a standard linear array of ultrasonic transducers has been simulated, exploiting the signal acquisition from multi-offset transducers. The synthetic images are quantitatively compared with <em>in vitro</em> carotid ultrasound real images, obtained with a high resolution B-mode scanner. By an experimental procedure the actual transverse carotid sections have been obtained and the digitized video camera profiles have been used to compute the backscattered field under the weak scattering assumption. The set of synthetic radiofrequency signals has been utilized for the reconstruction of synthetic aperture images and B-mode images as well. Finally the effects due to ultrasound propagation and instrumentation characteristics have been discussed and the implications on the image quality and the carotid contour determination have been analysed.</p></div>","PeriodicalId":100925,"journal":{"name":"Micron and Microscopica Acta","volume":"23 4","pages":"Pages 515-524"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0739-6260(92)90025-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80382918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

The effect of TCDD on the pineal gland of Han/Wistar rats TCDD对Han/Wistar大鼠松果体的影响

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90091-Q

Jere Linden , Raimo Pohjanvirta , Timo Rahko , Jouko Tuomisto

引用次数: 0

X-ray attenuation coefficients: Current status and availability x射线衰减系数:当前状态和可用性

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90119-X

Leif Gerward

引用次数: 1

Phase transformation of CVD ϰ-Al2O3 CVD的相变ϰ-Al2O3

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90147-6

J. Skogsmo , M. Halvarsson , S. Vuorinen

引用次数: 3

A method to extract homogeneous regions in 3-D confocal microscopy enabling compensation for depth dependent light attenuation 一种在三维共聚焦显微镜中提取均匀区域的方法，能够补偿深度依赖的光衰减

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90021-5

N. Åslund, A. Liljeborg

{"title":"A method to extract homogeneous regions in 3-D confocal microscopy enabling compensation for depth dependent light attenuation","authors":"N. Åslund, A. Liljeborg","doi":"10.1016/0739-6260(92)90021-5","DOIUrl":"10.1016/0739-6260(92)90021-5","url":null,"abstract":"<div><p>The problem considered is to compensate for the attenuation of light with depth when recording stacks of images with a confocal microscope, working in the epifluorescence mode. A basic assumption is that there are regions of the specimen that are homogeneous in the sense that the attenuation is constant within the region. A method is presented to trace such regions in the stack of recorded images. It is also shown how the attenuation factor of the traced region is determined. Its inverse is the correction factor to be used when compensating for the attenuation relevant to the region. Techniques have been implemented to perform the compensation automatically by changing the photomultiplier tube voltage during the recording, using computer control. Some results of using this technique are reported.</p><p>To trace a homogeneous region, a stack of 2-D histograms of adjacent images, a histostack, is used. It usually shows distinguishable features through which homogeneous regions can be traced. A homogeneous region may be extracted from the stack of recorded images and dealt with separately, set apart in a special stack. The residual stack of images, containing what is left over after a homogeneous region has been extracted, is also available, and can be used for further extractions of homogeneous regions. In this way the extraction procedure can be used for image segmentation in three dimensions.</p><p>A review is given of the fundamentals of the extraction process.</p></div>","PeriodicalId":100925,"journal":{"name":"Micron and Microscopica Acta","volume":"23 4","pages":"Pages 463-479"},"PeriodicalIF":0.0,"publicationDate":"1992-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0739-6260(92)90021-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91029013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

A HRTEM study of twins in CdTe and HgTe 双胞胎CdTe和hte的HRTEM研究

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90154-6

Grethe Waterloo, Ragnvald Høier, Kjersti Gjønnes

引用次数: 0

Drift corrected quantitative elemental mapping in freeze-dried thin cryosections: Metal compartmentation within earthworm chloragocytes 冻干薄切片中漂移校正定量元素定位:蚯蚓氯细胞内的金属区隔

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90051-E

Morgan A.J. , Winters C. , Wilkinson N.

引用次数: 1

Dependence between saccule and utricle in Ca and K concentrations determined by electron probe X-ray microanalysis 电子探针x射线微量分析测定钙钾浓度中囊泡和胞泡的相关性

Micron and Microscopica Acta Pub Date : 1992-01-01 DOI: 10.1016/0739-6260(92)90048-I

J.A. López-Escámez, P.V. Crespo, F.J. Cañizares, A. Campos

引用次数: 6