发布求助
文献互助 智能选刊 最新文献

The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.最新文献

筛选
英文 中文
Ultrasonic speckle denoising using the combination of wavelet transform and Wiener filter 基于小波变换和维纳滤波的超声斑点去噪方法
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412348
S. Udomhunsakul, P. Wongsita
{"title":"Ultrasonic speckle denoising using the combination of wavelet transform and Wiener filter","authors":"S. Udomhunsakul, P. Wongsita","doi":"10.1109/APBP.2004.1412348","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412348","url":null,"abstract":"Ultrasonic images are inherently affected by multiplicative noise, which is due to the coherent wave interference in tissue. This paper presents a method for ultrasonic speckle denoising using the combination of wavelet transform and wiener filter to effectively reduce the speckle noise while preserving the resolvable details. In our method, the steps involved are finding the 2D discrete wavelet transform of the logarithmic image. Then, the wiener filter is used to apply over areas in each detail subband (HH,HL and LH). Next the inverse wavelet transform is computed and applying the inverse logarithm. To evaluate the denoising performance, mean square error (MSE), signal to mean square error (S/mse) and edge preservation (/spl beta/) are used. From the experimental results, we found that our approach leads to an effective method for ultrasonic speckle denoising.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129823065","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: 10
Balanced detection optical heterodyne polarimeter for optical activity measurement of a quartz crystal 用于石英晶体光学活度测量的平衡检测光学外差偏振计
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412352
C. Chou, H. Tsai, Kuan-Yung Liao, Li-dek Chou
{"title":"Balanced detection optical heterodyne polarimeter for optical activity measurement of a quartz crystal","authors":"C. Chou, H. Tsai, Kuan-Yung Liao, Li-dek Chou","doi":"10.1109/APBP.2004.1412352","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412352","url":null,"abstract":"A novel amplitude sensitive optical heterodyne polarimeter in which a Zeeman laser associates with a balanced detector scheme to measure the optical activity |n/sub r/-n/sub l/ of a quartz crystal is proposed and experimentally demonstrated. The sensitivity of the measurement to 8.5/spl times/10/sup -10/ is analyzed.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124699783","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
A comparative investigation of influences of target size and contrast on diffuse optical tomography by featured-data and full time-resolved reconstructions 目标尺寸和对比度对特征数据和全时间分辨重建的漫射光学层析成像影响的比较研究
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412322
F. Gao, Huijuan Zhao, Y. Tanikawa, K. Homma, Y. Yamada
{"title":"A comparative investigation of influences of target size and contrast on diffuse optical tomography by featured-data and full time-resolved reconstructions","authors":"F. Gao, Huijuan Zhao, Y. Tanikawa, K. Homma, Y. Yamada","doi":"10.1109/APBP.2004.1412322","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412322","url":null,"abstract":"This paper presents time-resolved diffuse optical tomographic imaging of human lower legs and forearms. To identify the sources that cause the low quantitativeness in the reconstructed images, a comparative study is carried out on reality-simulating numerical phantoms using both the featured-data and full time-resolved algorithms.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"356 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115025419","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
Multiphoton optical biopsy 多光子光学活检
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412296
C. Dong, Wen Lo, Yen Sun, S. Teng, Yuan Liu, Hsuan-Shu Lee, Hsiao-Ching Chen, L. Chiou, Guan-Tarn Huang, Sung-Jan Lin, S. Jee, H. Tan, Wei-Chou Lin
{"title":"Multiphoton optical biopsy","authors":"C. Dong, Wen Lo, Yen Sun, S. Teng, Yuan Liu, Hsuan-Shu Lee, Hsiao-Ching Chen, L. Chiou, Guan-Tarn Huang, Sung-Jan Lin, S. Jee, H. Tan, Wei-Chou Lin","doi":"10.1109/APBP.2004.1412296","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412296","url":null,"abstract":"Multiphoton microscopy is to a powerful imaging modality in the life sciences. The improved image contrast, greater imaging depths, and focus limited photodamage enable multiphoton microscopy to be especially useful for in vivo bioimaging applications. For multiphoton microscopy to be widely applicable in for in vivo biopsy applications, characterization of the tissues of interest must first be performed ex vivo. This presentation is an overview of the microscopic and spectroscopic characterization of the tissue types being pursued by my group. Both multiphoton images and spectroscopic information of a diverse range of normal, damaged, or diseased tissues will be presented and the implications of our results discussed.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115166140","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
Axial resolution enhancement for an OCT system implemented by mechanically induced long-period fiber grating 机械诱导长周期光纤光栅实现的OCT系统轴向分辨率增强
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412317
Jihoon Na, Jooeun Im, Jinchae Kim, EunSeo Choi, Jae Ho Baek, B. Lee
{"title":"Axial resolution enhancement for an OCT system implemented by mechanically induced long-period fiber grating","authors":"Jihoon Na, Jooeun Im, Jinchae Kim, EunSeo Choi, Jae Ho Baek, B. Lee","doi":"10.1109/APBP.2004.1412317","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412317","url":null,"abstract":"We demonstrate a spectral filtering method that can enhance the axial resolution of an OCT system. A mechanically induced long-period grating was used to tailor the spectral shape of an in-house made Er-doped fiber amplified spontaneous emission source. The proposed method improved the visibility of the OCT image dramatically.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115232908","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
Surface enhanced Raman spectra in biochemical molecules and cell detection 表面增强拉曼光谱在生化分子和细胞检测中的应用
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412276
Tsuei-Lian Wang, Fang-Ying Peng, Hui-Hisn Lu, Yung-Ta Hung, Tung-Jing Fang, H. Chiang
{"title":"Surface enhanced Raman spectra in biochemical molecules and cell detection","authors":"Tsuei-Lian Wang, Fang-Ying Peng, Hui-Hisn Lu, Yung-Ta Hung, Tung-Jing Fang, H. Chiang","doi":"10.1109/APBP.2004.1412276","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412276","url":null,"abstract":"This work presents the quantitative detection of creatinine molecules and SERS signal from a single cell. Through the utilization of gold nanoparticles, we can measure the lower concentration of specimens. In biochemical molecules analysis, quantification of creatinine in human urine sample is demonstrated. The correlation coefficient can be reached as high as 0.99 for mixture sample, and 0.93 for human subject analysis.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114345262","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
High-speed image data acquisition of OCT utilizing push-pull operation of fiber-optic piezoelectric modulators 利用光纤压电调制器的推挽操作实现OCT的高速图像数据采集
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412254
M. Ohmi, K. Nohara, M. Haruna
{"title":"High-speed image data acquisition of OCT utilizing push-pull operation of fiber-optic piezoelectric modulators","authors":"M. Ohmi, K. Nohara, M. Haruna","doi":"10.1109/APBP.2004.1412254","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412254","url":null,"abstract":"A fiber-optic piezoelectric modulator (PZM) is a promising tool for high-speed image data acquisition of OCT. We demonstrate here the high-speed OCT utilizing push-pull operation of PZMs which can provide up to 2000 scan/sec with a scan depth of 2.5 mm. The axial resolution is 17 /spl mu/m for the 1.3-/spl mu/m wavelength. A motion-artifact-free in-vivo OCT of human finger tip is presented.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124372414","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
Depth-adaptive voxel size reconstruction for diffuse reflective optical tomography 漫反射光学层析成像的深度自适应体素大小重建
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412311
R. Endoh, M. Fujii, K. Nakayama
{"title":"Depth-adaptive voxel size reconstruction for diffuse reflective optical tomography","authors":"R. Endoh, M. Fujii, K. Nakayama","doi":"10.1109/APBP.2004.1412311","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412311","url":null,"abstract":"We study diffuse reflective optical tomography (DROT), aiming at the real-time imaging of the redox state change of the human cerebral cortex with the brain activity. In the uniform voxel size and simple regularization scheme we studied so far, the spatial resolution in the shallow region is unnecessarily good, whereas the noise and the sensitivity in the shallow region are too large to recover the signal in the depth. In this report, we present the result of the depth-adaptive voxel size reconstruction. By assigning wider lateral voxel size in the shallow range, the noise and the sensitivity in the shallow range is suppressed so that the signal in the deep range would be less masked by the presence of the unwanted target in the shallow range. We demonstrate the improvement of the 3-dimensional reconstructed image using the proposed depth-adaptive voxel size reconstruction.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131365877","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
Automatic in-situ observation of tissue laser ablation using optical coherence tomography 利用光学相干层析成像技术自动原位观察组织激光消融
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412365
M. Ohmi, M. Tanizawa, A. Fukunaga, M. Haruna
{"title":"Automatic in-situ observation of tissue laser ablation using optical coherence tomography","authors":"M. Ohmi, M. Tanizawa, A. Fukunaga, M. Haruna","doi":"10.1109/APBP.2004.1412365","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412365","url":null,"abstract":"In laser ablation of biological tissue, tomography of the tissue surface is necessary for measurement of the crater shape and the crater depth. We demonstrate here automatic in-situ observation of biological-tissue surface in laser ablation by OCT. Depth of a crater of human tooth is measured by these OCT images, and then the ablation rate of 0.21 /spl mu/m/pule is determined.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123998713","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
The prototype system of medicine-jet capsule endoscope 药物喷射胶囊内窥镜的原型系统
The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004. Pub Date : 2004-12-15 DOI: 10.1109/APBP.2004.1412356
C. Chiu, Yong-Long Lee, Chin-Tai Chen
{"title":"The prototype system of medicine-jet capsule endoscope","authors":"C. Chiu, Yong-Long Lee, Chin-Tai Chen","doi":"10.1109/APBP.2004.1412356","DOIUrl":"https://doi.org/10.1109/APBP.2004.1412356","url":null,"abstract":"The wireless capsule would have been more comfortable for the patients than the traditional endoscope or enterscope. The wireless capsules, such as Heidelberg capsule, pH capsule or M2A capsule, just would be the diagnostic tool. The present paper would show the prototype system of the functional capsule endoscope that could bring medicine to the nidus and jet the medicine. The prototype system would have the imager, illumination source, microlens, two-way wireless module and medicine-jet subsystem.","PeriodicalId":346624,"journal":{"name":"The Second Asian and Pacific Rim Symposium on Biophotonics, 2004. APBP 2004.","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129552694","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: 3
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