Article
Physics, Multidisciplinary
Yonghong Wang, Xiao Zhang, Qihan Zhao, Yanfeng Yao, Peizheng Yan, Biao Wang
Summary: We propose a novel system that uses a single camera to synchronously measure out-of-plane deformation and two orthogonal slopes. The linearly polarized reference beam interferes with the unpolarized object beam to measure the out-of-plane deformation, while a modified Mach-Zehnder interferometer is used to measure the two orthogonal slopes. This method has been proven effective through experiments on pressure-loaded circular plates.
Article
Optics
Boshuo Yang, Minyang Wu, Yinhang Ma, Hanyang Jiang, Fujun Yang
Summary: A new configuration of electronic speckle pattern interferometry (ESPI) is being developed for simultaneous three-dimensional deformation measurements. In this system, symmetrical illuminating arrangement with dual-wavelength lights is used to sense in-plane deformation components, while another device utilizing a different wavelength light measures out-of-plane deformation. Three-dimensional deformation information is obtained using temporal phase-shift method, and strain components related to surface deformation are determined through numerical differential. Experimental results verify the effectiveness and feasibility of the proposed ESPI system for measuring 3D deformation.
Article
Optics
Hanyang Jiang, Fujun Yang, Xiangjun Dai, Xiaoyuan He, Guangjian Peng
Summary: In this study, an ESPI system consisting of three sub-interferometers is proposed for simultaneous measurement of three displacement components and in-plane strain fields. The system utilizes a 3CCD color camera, a specially designed shifting stage, and three lasers to achieve the measurement, and the experimental results demonstrate the utility of the system.
Article
Chemistry, Analytical
Hung-Lin Hsieh, Bo-Yen Sun
Summary: The study introduces a compound speckle interferometer for measuring three-degree-of-freedom displacement, combining heterodyne interferometry, speckle interferometry, and beam splitting techniques. Experimental results demonstrate its excellent measurement capabilities for future real-world applications.
Article
Chemistry, Analytical
Gert Behrends, Dirk Stoebener, Andreas Fischer
Summary: LSWLI is a promising technique for high-resolution topography measurements on moving surfaces, where accurate lateral displacement information is essential. Monte Carlo simulations show that uncertainty in displacement measurement has a significant impact on total height uncertainty. Integrated DSC measurements provide precise displacement information without the need for synchronization or calibration, suitable for translatory and rotatory scans.
Article
Optics
Zhipeng Sheng, Bing Chen, Wenxin Hu, Keyu Yan, Hong Miao, Qingchuan Zhang, Qifeng Yu, Yu Fu
Summary: This paper proposes a laser Doppler vibrometer induced stroboscopic digital image correction for non-contact mode shape and operational deflection shape measurement. The results show that high spatial resolution mode shape and operational deflection shape can be obtained using single-point LDV and normal rate cameras.
Article
Optics
Appurva Jain, Abhishek Mishra, Vikrant Tiwari, Gurminder Singh, Ravinder Pal Singh, Sunpreet Singh
Summary: This paper proposes a DIC deformation measurement method based on the integer-pixel matching approach, which provides full field measurements and has the advantages of non-contact and high precision. The proposed method not only enables displacement invariance measurement with robustness and high efficiency, but also achieves an average accuracy of 0.1% in stress-strain results.
Article
Optics
Xing Zhou, Shuhai Jia, Hongqiang Yu, Liming Gao
Summary: This paper presents a dual-function speckle interferometry system that can simultaneously measure out-of-plane displacement and slope, with better accuracy in out-of-plane displacement calculation compared to traditional methods. The system has been proven effective in detecting internal defects at the edges.
JOURNAL OF MODERN OPTICS
(2022)
Article
Optics
Yao Huang, Xianfu Huang, Menglin Zhonga, Zhanwei Liu
Summary: A bilayer color digital image correlation (BC-DIC) method is reported for measuring the topography of a liquid interface. The method uses the refraction of speckle patterns at the interface to perform 3D reconstruction through 2D measurement. It is shown to be feasible and accurate for measuring the topography of transparent objects, including liquid interfaces.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Yassine Tounsi, Manoj Kumar, Karmjit Kaur, Fernando-Mendoza Santoyo, Osamu Matoba, Abdelkrim Nassim
Summary: The present work proposes the use of the non-local sparse principal component analysis (NLS-PCA) method for speckle noise reduction in interferometric fringe patterns. The method performs well in removing noise and preserving finer details and fringe edges, surpassing traditional methods in terms of performance evaluation metrics such as PSNR, SSIM, EPI, and ENL.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Optics
Gustavo A. Gomez-Mendez, Amalia Martinez-Garcia, David I. Serrano-Garcia, Juan Antonio Rayas-Alvarez, Areli Montes Perez, Juan M. Islas-Islas, Noel Ivan Toto-Arellano
Summary: This study proposes combining electronic speckle pattern interferometry with polarizing phase-shifting techniques to measure in-plane displacement fields, and demonstrates the effectiveness of the proposal through experimental validation.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Yimin Ye, Xiaodong Li, Jiemin Feng, Dongsheng Zhang
Summary: A dual-lens system has been proposed to expand the view angle of shearography and improve efficiency and detection accuracy. The new optical arrangement is simple to construct, with uniform brightness distribution, suitable for detecting objects with different materials.
Article
Engineering, Electrical & Electronic
Shengjia Wang, Yingjie Feng, Shuai Gao, Pengyuan Shi, Jianxuan Xiong, Pengfei Huang, Jiabin Wang, Zhan Gao, Sijin Wu, Weimin Sun
Summary: Proposal of a mechanical quantity sensing framework based on fiber-coupled common-path shearography for simultaneous measurement of deformation and slope. Optical fiber is used to generate holograms without breaking the common-path structure. Features include zero-approaching shear amount, separate control of spatial carriers, and scrambled reference wave. Single-shot phase measurement scheme is implemented by the spatial carrier method. Fiber scrambling is used to enhance the phase map quality. Physical principle demonstrated, and preliminary experiments verify the feasibility and functionality of the framework.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Aerospace
Zhe Dong, Yongzeng Li, Lingrui Jiao, Weiguo Zhang, Yingzheng Liu, Di Peng
Summary: A novel speckle pattern pressure-sensitive paint (PSP) system integrating the single-shot lifetime method and stereo digital image correlation (DIC) technique was proposed in this work. This system was successfully applied to measure the instantaneous pressure and deformation field of a high-speed rotating blade, showing highly consistent results with the regular PSP.
AEROSPACE SCIENCE AND TECHNOLOGY
(2022)
Article
Optics
Guoqing Gu, Yun Pan, Chengchun Qiu, Chengjie Zhu
Summary: A hybrid nondestructive testing approach based on shearography and digital speckle pattern interferometry is proposed for depth characterization of internal defect. By developing a novel dual-sensitive speckle interferometry system and combining bending theory and DSPI imaging results, the method successfully achieves qualitative representation and prediction of internal defect depth. Experimental results validate the feasibility and effectiveness of the proposed fusion method.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Chiara Catalano, Valentina Agnese, Giovanni Gentile, Giuseppe M. Raffa, Michele Pilato, Salvatore Pasta
Summary: Atlas-based analyses of patients with cardiovascular diseases have been explored to understand the mechanistic link between shape and pathophysiology. This study developed a statistical shape modeling (SSM) of the dilated aorta with both bicuspid aortic valve (BAV) and tricuspid aortic valve (TAV) and assessed the computational hemodynamics of virtual models obtained by deformation. The simulations showed remarkable changes in velocity, blood pressure, and fluid shear stress with the principal shape modes. The atlas-based disease assessment can provide insights on the hemodynamics of ATAA, especially for aneurysms with borderline anatomies.
APPLIED SCIENCES-BASEL
(2022)
Article
Physiology
Andrew D. Wisneski, Yunjie Wang, Salvatore Cutugno, Salvatore Pasta, Ashley Stroh, Jiang Yao, Tom C. Nguyen, Vaikom S. Mahadevan, Julius M. Guccione
Summary: The aim of this study was to create a patient-specific computational model of low-flow, low-gradient aortic stenosis (AS) based on clinical imaging to obtain biomechanics data about the left ventricle. The model accurately replicated key physiologic parameters and found a correlation between low myocardial stress and clinical outcomes of the disease.
FRONTIERS IN PHYSIOLOGY
(2022)
Review
Chemistry, Multidisciplinary
Vincenza Sciortino, Salvatore Pasta, Tommaso Ingrassia, Donatella Cerniglia
Summary: Finite element modelling of the lumbar spine is challenging but crucial for understanding spinal biomechanics and developing innovative therapies. Patient-specific computational simulations require validation and verification to ensure accurate results.
APPLIED SCIENCES-BASEL
(2023)
Article
Biotechnology & Applied Microbiology
Fabrizio Crasci, Stefano Cannata, Giovanni Gentile, Caterina Gandolfo, Salvatore Pasta
Summary: This study evaluates the structural and hemodynamic performance of the TricValve system implanted percutaneously in the superior and inferior vena cava of patients with severe tricuspid regurgitation and venous congestion. Computational analysis shows that after TricValve implantation, the contact pressure on the vena cava wall decreases and there is a decrease in time-averaged pressure. This study demonstrates the potential of computational tools to improve the biomechanical performance of structural tricuspid valve interventions and aid in the design of next-generation transcatheter therapies.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Engineering, Biomedical
Federica Cosentino, Selda Sherifova, Gerhard Sommer, Giuseppe Raffa, Michele Pilato, Salvatore Pasta, Gerhard A. Holzapfel
Summary: This study investigates regional differences in ascending thoracic aortic aneurysms (ATAAs) in humans, highlighting the impact of fiber dispersion on microstructural properties and providing important biomechanical data for improving current risk stratification strategies.
ACTA BIOMATERIALIA
(2023)
Review
Engineering, Multidisciplinary
Francesco Scardulla, Gloria Cosoli, Susanna Spinsante, Angelica Poli, Grazia Iadarola, Riccardo Pernice, Alessandro Busacca, Salvatore Pasta, Lorenzo Scalise, Leonardo D'Acquisto
Summary: Wearable monitoring systems are expected to shift healthcare out of inpatient settings. Photoplethysmography (PPG) is integrated into wrist-worn commercial products, offering advantages in cost and size. However, PPG-based devices are influenced by various factors, hindering objective characterization. Lack of standardization for data collection and processing limits the full potential of this technology. This review aims to summarize influencing parameters of PPG and propose guidelines for standardization.
Article
Biotechnology & Applied Microbiology
Roberta Scuoppo, Stefano Cannata, Giovanni Gentile, Caterina Gandolfo, Salvatore Pasta
Summary: This study used finite-element analysis to quantify coronary flow in a patient who underwent TAVR-in-TAVR and found that high implantation depth and device undersize of the second THV can significantly reduce coronary flow. Additionally, a positive correlation was observed between coronary flow and the valve-to-coronary distance.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Cardiac & Cardiovascular Systems
Alessia Gallo, Valentina Agnese, Sergio Sciacca, Cesare Scardulla, Manlio Cipriani, Michele Pilato, Jae K. Oh, Salvatore Pasta, Joseph Maalouf, Pier Giulio Conaldi, Diego Bellavia
Summary: This study aimed to identify circulating miRNAs that are highly expressed in myocardial tissue and significantly associated with echocardiographic and hemodynamic measures in patients with heart failure. miR-30d was correlated with left ventricular volumes, miR-126-3p was associated with pulmonary artery pressure and pulmonary capillary wedge pressure, and miR-483-3p had an association with right ventricular end diastolic diameter and central venous pressure.
Article
Materials Science, Biomaterials
Salvatore Pasta
Summary: This study assessed the structural and hemodynamic performance of the MitraClip device in a high-fidelity model of the human heart with a healthy mitral valve geometry. The results showed that MitraClip implantation induced geometrical changes in the mitral valve and abnormal hemodynamic conditions, but computational modeling could predict potential adverse events and complications, enhancing the safety and effectiveness of transcatheter mitral valve repairs.
Article
Cardiac & Cardiovascular Systems
Chiara Catalano, Tahir Turgut, Omar Zahalka, Nils Goetzen, Stefano Cannata, Giovanni Gentile, Valentina Agnese, Caterina Gandolfo, Salvatore Pasta
Summary: This study developed a non-invasive inverse approach to estimate reliable material constituents for the aortic root and calcified valve leaflets in TAVI patients. The identification of material parameters was based on minimizing the difference between model predictions and cardiac-gated CT measurements. The results demonstrated the feasibility and potential benefits of using non-invasive imaging techniques and computational modeling in estimating material properties for TAVI patients.
CARDIOVASCULAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Engineering, Electrical & Electronic
Salvatore Pasta, Chiara Catalano, Fabrizio Crasci, Roberta Scuoppo
Summary: This study developed a low-cost custom biaxial system capable of accurately characterizing the mechanical behavior of soft tissues. The system's performance was evaluated through tests on a calibration spring and frozen porcine aorta samples, demonstrating its ability to accurately test materials. The system provides researchers with a valuable tool for cardiovascular disease research and tissue engineering applications.
Proceedings Paper
Engineering, Civil
Vincenza Sciortino, Donatella Cerniglia, Salvatore Pasta, Tommaso Ingrassia
Summary: This article introduces the current research on the biomechanics of the spinal column and intervertebral disc, and presents a new approach using fractional calculus to fully describe the viscoelastic behavior of the disc. This new approach could lead to a breakthrough in understanding herniated disc pathologies and identifying strategies to deal with them.
EUROPEAN WORKSHOP ON STRUCTURAL HEALTH MONITORING (EWSHM 2022), VOL 1
(2023)
Proceedings Paper
Engineering, Biomedical
Chiara Catalano, Stefano Cannata, Valentina Agnese, Gianluca Buffa, Livan Fratini, Salvatore Pasta, Caterina Gandolfo
Summary: Transcatheter mitral valve replacement (TMVR) is a promising alternative treatment for patients who are not eligible for surgery. This study developed patient-specific simulations and 3D printed models to predict and assess the obstructive complications of TMVR. The results showed good agreement between numerical predictions, 3D printed model measurements, and post-TMVR diagnostic images. This approach provides a comprehensive and efficient tool for evaluating the feasibility of TMVR.
V CIRP CONFERENCE ON BIOMANUFACTURING
(2022)
Article
Biotechnology & Applied Microbiology
Vincenza Sciortino, Salvatore Pasta, Tommaso Ingrassia, Donatella Cerniglia
Summary: This study aimed to develop a probabilistic atlas of the lumbar spine segment using statistical shape modeling and explore the variability of spine geometry using principal component analysis. The results showed that the principal shape modes were associated with specific morphological features of the spine segment, which can contribute to the development of new treatments for spine disorders.
BIOENGINEERING-BASEL
(2022)
Article
Materials Science, Biomaterials
Chiara Catalano, Salvatore Pasta
Summary: Transcatheter aortic valve replacement (TAVR) has become an important milestone for managing aortic stenosis in patients who are not suitable for surgery. Computational simulations have been used to predict the interaction between bioprostheses and patients in a patient-specific manner, improving preoperative planning. This review evaluates the recent advances in computational modeling for TAVR and TMVR.
