发布求助
文献互助 智能选刊 最新文献

Advances in Optical Imaging and Photon Migration最新文献

筛选
英文 中文
Effects of Sources, Boundaries, and Heterogeneities on Photon Migration 光源、边界和异质性对光子迁移的影响
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1994.apmpdwi.83
S. Jacques, M. Ostermeyer, Lihong V. Wang, A. Hielscher
{"title":"Effects of Sources, Boundaries, and Heterogeneities on Photon Migration","authors":"S. Jacques, M. Ostermeyer, Lihong V. Wang, A. Hielscher","doi":"10.1364/aoipm.1994.apmpdwi.83","DOIUrl":"https://doi.org/10.1364/aoipm.1994.apmpdwi.83","url":null,"abstract":"This paper considers three issues regarding the suitability of diffusion theory for calculations of\u0000 photon density waves: \u0000 (1) Directed sources, such as a collimated beam,\u0000 (2) Boundaries (eg., an air/tissue interface), and \u0000 (3) Heterogeneities (eg., tumor or vessel).\u0000 Heterogeneities have optical properties of absorption (µa) and scattering (µs'\u0000 = µs(1-g)) in [cm-1] which differ from the surrounding background tissue\u0000 properties, and are treated by a method of superposition of virtual sources (the SVS Method).","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132279104","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: 0
Absorption and Scattering Properties in a Highly Absorbing Turbid Medium 高吸收混浊介质中的吸收和散射特性
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1994.opttm.272
H. Liu, D. Boas, B. Beauvoit, E. Rachofsky, M. A. O'Leary, T. Kitai, B. Chance
{"title":"Absorption and Scattering Properties in a Highly Absorbing Turbid Medium","authors":"H. Liu, D. Boas, B. Beauvoit, E. Rachofsky, M. A. O'Leary, T. Kitai, B. Chance","doi":"10.1364/aoipm.1994.opttm.272","DOIUrl":"https://doi.org/10.1364/aoipm.1994.opttm.272","url":null,"abstract":"The use of NIR spectroscopy to determine, within the diffusion approximation, the absorption and scattering coefficients (μa and μs') of a highly-absorbing turbid medium is very difficult. In this paper, we investigate whether this difficulty results theoretically from the invalidation of the diffusion approximation or technically from the weak light intensity and small signal to noise ratio caused by the high absorption. First, we employ the transport theory in a simplified form to predict the ratio μa/μs' when the diffusion approximation becomes invalid. We show that the diffusion theory breaks down when the ratio of μa/μs' is equal to ~1/10. This implies that the diffusion approximation is still valid theoretically for a very high absorbing organ, such as liver. Then, as an example of NIR spectroscopy with highly absorbing tissue, we present in vivo hemoglobin saturation studies on cuffed human forearms using continuous, amplitude modulated, and pulsed light.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116659592","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: 0
An Imaging System for Low Coherence Tomography 低相干层析成像系统
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1996.cit247
Eva Lankenau, P. Koch, R. Engelhardt
{"title":"An Imaging System for Low Coherence Tomography","authors":"Eva Lankenau, P. Koch, R. Engelhardt","doi":"10.1364/aoipm.1996.cit247","DOIUrl":"https://doi.org/10.1364/aoipm.1996.cit247","url":null,"abstract":"We investigate methods to realise optical low coherence tomography with field illumination and an imaging system. The coherence gated measurements are performed with a Michelson interferometer, imaging optics and a slow-scan CCD camera. The probe is illuminated by a parallel beam with a diameter of up to 1mm. A limitation of this method is set by multiple scattering within the tissue. To describe the influence of multiple scattered photons, light is focused on the sample and the backscattered light is superimposed by a parallel reference beam. We describe the limits for measuring 3-dimensional structures within scattering samples.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134450970","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
Surface Intensity Profiles for Optical Propagation in Random Media 随机介质中光传播的表面强度分布
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1994.dcwi.301
A. A. Lisyanky, D. Livdan, J. H. Li, T. D. Cheung, A. Z. Genack
{"title":"Surface Intensity Profiles for Optical Propagation in Random Media","authors":"A. A. Lisyanky, D. Livdan, J. H. Li, T. D. Cheung, A. Z. Genack","doi":"10.1364/aoipm.1994.dcwi.301","DOIUrl":"https://doi.org/10.1364/aoipm.1994.dcwi.301","url":null,"abstract":"The time-dependent intensity profile of photons propagating in a random media with reflective boundaries is calculated. Excellent agreement is found between theoretical calculations and measurements of transmission and surface intensity profiles in samples with different surface reflectivities. These results allow us to determine the coherent penetration depth and the optical transport mean-free path are obtained.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133269998","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: 0
Theoretical and Experimental Investigations of Elastic Scattering Spectroscopy as a Potential Diagnostic for Tissue Pathologies 弹性散射光谱作为组织病理潜在诊断的理论和实验研究
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1994.opttm.265
J. Boyer, J. Mourant, I. Bigio
{"title":"Theoretical and Experimental Investigations of Elastic Scattering Spectroscopy as a Potential Diagnostic for Tissue Pathologies","authors":"J. Boyer, J. Mourant, I. Bigio","doi":"10.1364/aoipm.1994.opttm.265","DOIUrl":"https://doi.org/10.1364/aoipm.1994.opttm.265","url":null,"abstract":"The spectral distribution of the diffuse reflectance of five sizes of polystyrene microspheres has been measured with an elastic scatter spectrometer designed for optical biopsy of living tissue. The microsphere sizes are representative of the suspected scattering centers in living tissue. The experiment data are discussed and interpreted in the framework of Mie scattering theory and Monte-Carlo transport analysis. Present results support the assertion that Mie theory is necessary to describe the spectral features of elastic scatter spectroscopy in tissue.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129075895","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: 1
Speckle Spectroscopy under Atmospheric Turbulence 大气湍流下的散斑光谱
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1994.wpl.60
N. Baba, S. Kuwamura, N. Miura, Y. Norimoto
{"title":"Speckle Spectroscopy under Atmospheric Turbulence","authors":"N. Baba, S. Kuwamura, N. Miura, Y. Norimoto","doi":"10.1364/aoipm.1994.wpl.60","DOIUrl":"https://doi.org/10.1364/aoipm.1994.wpl.60","url":null,"abstract":"A method for speckle spectroscopy under atmospheric turbulence is described. A stellar speckle image and its dispersed speckle image are observed simultaneously. An object is reconstructed from speckle images, and its spectrum is reconstructed from dispersed speckle images referring to their speckle images. The shift-and-add reconstruction method is discussed in comparison with ballistic light imaging. Several observational results show that stellar spectroscopy with high-spatial resolution is feasible even under atmospheric turbulence.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128524986","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: 0
Tomographic Detection of Fluorophores Embedded in Tissue-Like Phantom 组织样幻体中嵌入荧光团的层析检测
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1996.trit116
Jun Wu, L. Perelman, R. Dasari, M. Feld
{"title":"Tomographic Detection of Fluorophores Embedded in Tissue-Like Phantom","authors":"Jun Wu, L. Perelman, R. Dasari, M. Feld","doi":"10.1364/aoipm.1996.trit116","DOIUrl":"https://doi.org/10.1364/aoipm.1996.trit116","url":null,"abstract":"We present a prototype tomographic system and a simple inverse algorithm to detect fluorescent objects embedded in thick tissue-like phantoms using early arriving fluorescence photons.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115935390","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: 1
Convolution Backprojection Reconstruction from Photon Density Waves 光子密度波的卷积反投影重建
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1996.ria305
P. M. Eckman, G. Faris
{"title":"Convolution Backprojection Reconstruction from Photon Density Waves","authors":"P. M. Eckman, G. Faris","doi":"10.1364/aoipm.1996.ria305","DOIUrl":"https://doi.org/10.1364/aoipm.1996.ria305","url":null,"abstract":"We describe the application of the convolution backprojection algorithm to reconstruction of a simple object viewed with photon density waves.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116329875","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: 0
Ultrafast Upconversion Time-Gating in Rare-Earth Doped Glasses for Optical Imaging Through Highly Scattering Media. 高散射介质光学成像中稀土掺杂玻璃的超快上转换时间门控。
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1996.trit119
G. Voevodkin, Tim van Doom
{"title":"Ultrafast Upconversion Time-Gating in Rare-Earth Doped Glasses for Optical Imaging Through Highly Scattering Media.","authors":"G. Voevodkin, Tim van Doom","doi":"10.1364/aoipm.1996.trit119","DOIUrl":"https://doi.org/10.1364/aoipm.1996.trit119","url":null,"abstract":"A new subpicosecond time-gating technique based on two step upconversion absorption of signal and reference pulses at two different wavelengths by rare-earth ions (Pr3+) is presented.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125925384","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: 0
A Noninvasive Optical Topography Measurement System 一种无创光学地形测量系统
Advances in Optical Imaging and Photon Migration Pub Date : 1900-01-01 DOI: 10.1364/aoipm.1996.di344
Y. Yamashita, A. Maki, H. Koizumi
{"title":"A Noninvasive Optical Topography Measurement System","authors":"Y. Yamashita, A. Maki, H. Koizumi","doi":"10.1364/aoipm.1996.di344","DOIUrl":"https://doi.org/10.1364/aoipm.1996.di344","url":null,"abstract":"The developed system noninvasively measures topographic images inside tissue by using near-infrared light. Nine incident and four detecting optical fibers are arranged alternately at square lattice points on the subject. Incident light is optically demultiplexed and connected to one of the incident fibers. Light reflected from the subject is received by the detecting fibers, each of which is connected to a photo-diode. The photo-diode outputs are multiplexed. Sixteen combinations of neighboring incident- and detecting-fibers are selected sequentially. Evaluation of system performance by using a phantom containing an absorber localized in a scattering medium showed that this system can topographically detect brain activity in the cerebral cortex.","PeriodicalId":368664,"journal":{"name":"Advances in Optical Imaging and Photon Migration","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122012387","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: 2
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信