Conference on Biomedical Photonics and Cross-Fusion最新文献

Comparisons of filtered back-projection and time reversal algorithms in photoacoustic tomography 光声断层成像中滤波反投影和时间反转算法的比较

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691295

Jinqiang Wei, Kang Shen, Chao Tian

{"title":"Comparisons of filtered back-projection and time reversal algorithms in photoacoustic tomography","authors":"Jinqiang Wei, Kang Shen, Chao Tian","doi":"10.1117/12.2691295","DOIUrl":"https://doi.org/10.1117/12.2691295","url":null,"abstract":"In photoacoustic tomography (PAT), image reconstruction has a fundamental impact on image quality and imaging speed. Among various reconstruction algorithms, the analytical filtered back-projection (FBP) and the numerical time reversal (TR) algorithms are two commonly used image reconstruction techniques in PAT. However, so far, no comprehensive studies are reported on the comparisons of FBP and TR algorithms. In this work, we compare these two algorithms from the perspectives of computational efficiency, robustness to non-ideal detection surfaces, and applicability to heterogeneous media. The results show that: 1) In terms of computational efficiency, FBP is typically faster than TR due to its flexibility in the selection of the reconstruction region. 2) For non-ideal detection surfaces-based reconstruction, FBP can provide more accurate amplitude information for the limited-view reconstruction and can produce fewer image artifacts for the sparse-view reconstruction. 3) For acoustically heterogeneous media, the TR algorithm can incorporate acoustic properties and thus can yield high-quality images, while FBP fails in this case. This study can help researchers gain a deeper understanding of the FBP and TR algorithms and is expected to provide a guide for the reasonable selection of PAT image reconstruction algorithms.","PeriodicalId":164997,"journal":{"name":"Conference on Biomedical Photonics and Cross-Fusion","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114632485","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

Lensed fiber-optic scanning two-photon endomicroscopic imaging 透镜光纤扫描双光子内镜成像

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691322

Conghao Wang, Xiulei Zhang, Huilan Liu, Aimin Wang, Lishuang Feng

引用次数: 0

Study on the low frequency magnetic detection sensitivity of cavity optomechanical magnetometer 腔光机械磁强计低频磁检测灵敏度的研究

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691240

Tiedong Xu, Han Ping, X. Kong

{"title":"Study on the low frequency magnetic detection sensitivity of cavity optomechanical magnetometer","authors":"Tiedong Xu, Han Ping, X. Kong","doi":"10.1117/12.2691240","DOIUrl":"https://doi.org/10.1117/12.2691240","url":null,"abstract":"The whispering gallery mode ( WGM ) microcavity is a widely used microresonator. With its ultra-high quality factor Q ( above 109 ) and small mode volume ( µm3 ) , it can amplify the interaction between substances. The giant magnetostrictive material Terfenol-D is a rare earth material that can respond to changes in the magnetic field. With its ultra-high magnetostrictive coefficient ( 1500∼2000 ppm ), ultra-fast response speed( less than 1 µs ), and efficient energy conversion efficiency ( about 50% ), it is widely used in magnetic field sensors. Therefore, a high-sensitivity cavity optomechanical magnetometer can be designed and manufactured by combining the WGM and Terfenol-D. By analyzing the inherent characteristic frequency and magnetostrictive material characteristics of the cavity optomechanical magnetometer, the sensitivity of the magnetometer in magnetic field detection is greatly improved by mixing the bias magnetic field with the excitation magnetic field. In our simulation, compared with the environment without bias magnetic field, the deformation of the cavity optomechanical magnetometer is about 106 times higher of the original after adding the bias magnetic field, which will greatly enhance the detection sensitivity of the excitation magnetic field and provide an effective method for detecting biomagnetic signals.","PeriodicalId":164997,"journal":{"name":"Conference on Biomedical Photonics and Cross-Fusion","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132142240","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

Simulation study on laser induced bubble generation of liquid in lumen 激光诱导液体在管内产生气泡的模拟研究

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691335

Z. Huang, Fengyi Miao

引用次数: 0

A self-supervised learning approach for high-resolution diffuse optical tomography using neural fields 基于神经场的高分辨率漫射光学断层扫描的自监督学习方法

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691305

Linlin Li, Siyuan Shen, Shengyu Gao, Yuehan Wang, Liang Gu, Shiying Li, Xingjun Zhu, Jiahua Jiang, Jingyi Yu, Wuwei Ren

引用次数: 0

Nonmagnetic VCSEL package and driver circuit for SERF atomic magnetometer 原子磁强计无磁VCSEL封装及驱动电路

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691289

Kun Yang, Yingjie Cai, Zihan Xu, Tiedong Xu, Xiangyan Kong

引用次数: 0

A dual-modality imaging method based on polarimetry and second harmonic generation 一种基于偏振法和二次谐波产生的双模成像方法

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691212

Yuzhu Shi, Honghui He, Hui Ma

{"title":"A dual-modality imaging method based on polarimetry and second harmonic generation","authors":"Yuzhu Shi, Honghui He, Hui Ma","doi":"10.1117/12.2691212","DOIUrl":"https://doi.org/10.1117/12.2691212","url":null,"abstract":"Characterization and evaluation of skin tissue structures are crucial for diagnosis of skin diseases. Recently, the Mueller matrix polarimetry and second harmonic generation microscopy have been widely used in skin tissue imaging due to their unique advantages. However, it is difficult to evaluate comprehensive structural characteristics of complex layered skin tissue by a single imaging modality. Therefore, we propose a dual-modality imaging method combining Mueller matrix polarimetry and second harmonic generation microscopy to achieve the automatic differentiation and quantitative evaluation of different layers of skin tissue. It is demonstrated that the dual-modality method can well divide the mouse tail skin tissue specimens’ images into three layers of stratum corneum, epidermis, and dermis. Then, the texture feature vector extracted by gray level co-occurrence matrix is used to quantitatively characterize the structure features of each layer. Finally, we propose an index named S-Health based on cosine similarity and the gray level co-occurrence matrix texture parameters to quantitatively measure the structural differences between damaged and normal skin areas. The experiments validate the efficacy of the dual-modality imaging method in discriminating and assessing skin tissue structures. It confirms the potential of the proposed method for dermatological practices","PeriodicalId":164997,"journal":{"name":"Conference on Biomedical Photonics and Cross-Fusion","volume":"12753 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129809174","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 novel, low-cost paper-based liver function point-of-care system 一种新颖、低成本的纸质肝功能即时检测系统

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691259

Yingchun Li, Hao Cheng, X. Zhang

{"title":"A novel, low-cost paper-based liver function point-of-care system","authors":"Yingchun Li, Hao Cheng, X. Zhang","doi":"10.1117/12.2691259","DOIUrl":"https://doi.org/10.1117/12.2691259","url":null,"abstract":"As one of the important means of quantitative evaluation of liver injury, biochemical analyzer is a conventional testing method. However, it has not been widely used in low - middle - income countries (LMICs) due to the limited personnel, lack of funding and complicated environmental problems. How to acquire the information of liver injury quickly with simple and efficient method providing powerful support for clinical decision-making is still a challenge for LMICs. To solve this problem, we designed a novel and easy-to-use point of care system for liver injury. This system consists of a detection device which is based on a two-photon macro photochemical sensor and a paper-based test card with a built-in system for blood cell filtration. The two-photon structure is used to reduce the overall volume and cost of the system, it makes up for the inter-station errors introduced during the instrument assembly process. The blood cell filtration system reduces the operational complexity, and the blood can be filtered, react and change color directly on the test card. The detection device obtains the continuous light reflection signal of the paper-based test card and quantifies the signal to complete the quantitative test of liver damage indexes. We simulated the national environment of LMICs to evaluate the performance of the system: under the environment of 35℃ and 90% relative humidity, 40 Heparin whole blood, the correlation R2 between our system and MindrayBS350s was greater than 0.95. Both of the Randox Quality Control level 2 and level 3 repeatability CV were less than 7.5%. The results show that the system is not only small in size, low in cost and simple in operation, its measurement performance and stability meet the clinical requirements of high temperature and high humidity environment, and so it can be used in LMICs for primary liver function screening and liver disease progression assessment.","PeriodicalId":164997,"journal":{"name":"Conference on Biomedical Photonics and Cross-Fusion","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126913989","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

Raman spectrum classification and identification of COVID-19 based on RFE-RF 基于RFE-RF的新型冠状病毒拉曼光谱分类与鉴定

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2690704

Xueyu Yang, Wandan Zeng, Min Wu

引用次数: 0

Study of milk concentration detection based on the AC signal-modulated LED 基于交流信号调制LED的牛奶浓度检测研究

Conference on Biomedical Photonics and Cross-Fusion Pub Date : 2023-07-28 DOI: 10.1117/12.2691401

Haonan Xing, Xiaoqi Wei, Lin Gui, Mingyu Cao, Xuhuix Chen, Cunliang Cheng

{"title":"Study of milk concentration detection based on the AC signal-modulated LED","authors":"Haonan Xing, Xiaoqi Wei, Lin Gui, Mingyu Cao, Xuhuix Chen, Cunliang Cheng","doi":"10.1117/12.2691401","DOIUrl":"https://doi.org/10.1117/12.2691401","url":null,"abstract":"As milk consumption increases, rapid detection of milk concentration is becoming more and more crucial. In this research, we propose an LED-based milk concentration detection system, which is a new detection method that detects milk concentration by loading the LED with RF signals. The system includes an arbitrary waveform generator (AWG), LED, lampshade, silicon photo dioxide (PD), oscilloscope, and other components. After passing through different concentrations of milk solution, the light signal carrying a specific frequency is received by the PD, and after photoelectric conversion, the signal carrying a specific frequency in the light signal is converted out, and the concentration of the milk solution to be measured is obtained by reading the peak value measured by the oscilloscope. The experiments validated different brands of milk solutions with varying concentrations, demonstrating the feasibility of LED-based milk concentration detection, and the test analysis was performed for the same brand of milk solutions with varying concentrations, yielding a quadratic fit R2=0.9169, confirming that the system has good sensing performance for milk concentration and validating the method's feasibility.","PeriodicalId":164997,"journal":{"name":"Conference on Biomedical Photonics and Cross-Fusion","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134593812","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