2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)最新文献_第4页

Deep Feature-Based Automated Chest Radiography Compliance Assessment 基于深度特征的自动胸片依从性评估

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175341

Matilde Costa, Sofia Cardoso Pereira, J. Pedrosa, A. Mendonça, A. Campilho

{"title":"Deep Feature-Based Automated Chest Radiography Compliance Assessment","authors":"Matilde Costa, Sofia Cardoso Pereira, J. Pedrosa, A. Mendonça, A. Campilho","doi":"10.1109/ENBENG58165.2023.10175341","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175341","url":null,"abstract":"Chest radiography is one of the most common imaging exams, but its interpretation is often challenging and time-consuming, which has motivated the development of automated tools for pathology/abnormality detection. Deep learning models trained on large-scale chest X-ray datasets have shown promising results but are highly dependent on the quality of the data. However, these datasets often contain incorrect metadata and non-compliant or corrupted images. These inconsistencies are ultimately incorporated in the training process, impairing the validity of the results. In this study, a novel approach to detect non-compliant images based on deep features extracted from a patient position classification model and a pre-trained VGG-16 model are proposed. This method is applied to CheXpert, a widely used public dataset. From a pool of 100 images, it is shown that the deep feature-based methods based on a patient position classification model are able to retrieve a larger number of non-compliant images (up to 81% of non-compliant images), when compared to the same methods but based on a pretrained VGG16 (up to 73%) and the state of the art uncertainty-based method (50%).","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124415965","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

Development and Characterization of Porous PDMS Microneedles 多孔PDMS微针的研制与表征

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175361

Renata Maia, P. Sousa, V. Pinto, R. Lima, G. Minas, Raquel O. Rodrigues

{"title":"Development and Characterization of Porous PDMS Microneedles","authors":"Renata Maia, P. Sousa, V. Pinto, R. Lima, G. Minas, Raquel O. Rodrigues","doi":"10.1109/ENBENG58165.2023.10175361","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175361","url":null,"abstract":"This study aimed the development and characterization of polydimethylsiloxane (PDMS) porous microneedles (MNs) cast with silica nanoparticles as porogenic material for biomedical applications. To produce the porous PDMS MNs, different concentrations of silica nanoparticles were cast into PDMS, followed by chemical etching to remove the casted material and produce a porogenic network. This chemical etching was achieved using NaOH and it included initial steps for homogenization of the silica material dispersed in ethanol mixed with PDMS and followed by the evaporation of the solvent. Afterwards, the morphology, wettability, air permeability, swelling, porosity, surface chemistry, and mechanical characteristics of the developed porous PDMS MNs were investigated. The results showed that the porosity and mechanical properties of porous MNs could be tailored by varying the porogenic material concentration. Overall, the results of this study suggest that PDMS porous MNs have great potential as platforms for biomedical applications such as drug delivery, designed with a simple and rapid procedure that can be tuned in the detriment of the application.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131069956","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

Sagittal Lower Limb Joint Angular Phase-Plane Analysis at Long, Short and No-Countermovement 下肢矢状关节长、短、无反运动角相面分析

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175319

C. Rodrigues, M. Correia, J. Abrantes, M. Rodrigues, J. Nadal

引用次数: 0

Development of New Surgical Mesh Geometries with Different Mechanical Properties Using the Design Freedom of 3D Printing 利用3D打印的设计自由开发具有不同机械性能的新型手术网格几何形状

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175368

S. Sterk, M. E. T. Silva, A. A. Fernandes, A. Huß, A. Wittek

{"title":"Development of New Surgical Mesh Geometries with Different Mechanical Properties Using the Design Freedom of 3D Printing","authors":"S. Sterk, M. E. T. Silva, A. A. Fernandes, A. Huß, A. Wittek","doi":"10.1109/ENBENG58165.2023.10175368","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175368","url":null,"abstract":"The use of various rapid prototyping technologies in connection with the development of new medical products offers a newfound freedom of shape design that allows direct influence on the mechanical properties. Melt electrowriting (MEW) offers the possibility to redesign surgical meshes and their geometry, creating different geometries with different mechanical properties without changing the material properties. The adaptation of the mechanical properties plays an important role in the transplantation of medical products into a host tissue to mimic the mechanical behaviour of soft tissues as well as possible. To improve the adaptability of surgical meshes for pelvic organ prolapse (POP), wavy fibres and wavy fibre meshes were designed and printed using an optimised MEW printing process to mimic the mechanical behaviour of vaginal tissue. The mechanical examination based on design of experiments methods shows a widely varying mechanical range that can mimic different elastic soft tissues with mesh deformations up to 100 % elongation, a Young's modulus ranging from 50 to 400 N/mm2 and a variable toe region. An adaptation of the geometry to the soft tissue of the human vaginal wall shows a sufficient fitting and can be improved by further adjustments of the geometry. The printed meshes have a porosity and effective porosity of over 70 % and are lightweight or ultra-lightweight. By combining adapted mechanical properties with good porosity and weight, 3D printed meshes made of polycaprolactone (PCL) with a wavy fibre geometry are an interesting solution that may improve the outcomes of the pelvic surgery to treat the POP.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128456127","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

Towards Opportunistic Electrocardiography (ECG) Sensing in Mobile Devices 在移动设备中实现机会性心电图(ECG)传感

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175333

Tiago Almeida Bolaños, H. P. da Silva

引用次数: 0

Novel Real-time Metrics for Quantified Vineyard Workers' Operations with Wearable Devices 使用可穿戴设备量化葡萄园工人操作的新型实时指标

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175321

Adriana Arrais, D. Dias, J. P. Cunha

引用次数: 0

Sunglasses frame impact in eyes protection 太阳镜镜框对眼睛的保护作用

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175327

Pedro Guedes, Augusto Perez de Andrade, Pedro T. X. Da Silva, L. Ventura

{"title":"Sunglasses frame impact in eyes protection","authors":"Pedro Guedes, Augusto Perez de Andrade, Pedro T. X. Da Silva, L. Ventura","doi":"10.1109/ENBENG58165.2023.10175327","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175327","url":null,"abstract":"The present study aims to evaluate the effectiveness of sunglasses frames in enhancing eye safety against ultraviolet backscatter light. Current standards for sunglasses primarily focus on establishing safe limits for lens transmittance within the 280 nm to 380 nm range. However, it is crucial to recognize the role of frames in safeguarding the eyes from ultraviolet exposure. In pursuit of this objective, a prototype has been developed to simulate backscattered light environments and measure the frame's contribution to blocking the light that reaches the eye while wearing sunglasses. The prototype consists of an LED-illuminated sphere, a mannequin head equipped with optical sensors, and a comprehensive set of baseline and measurement procedures. A total of 29 samples were tested, revealing variations in the light blocking capabilities of different frame types, ranging from 68% to 80%. It is worth emphasizing that this study is an ongoing endeavor, with current efforts focused on enhancing the prototype. These improvements will enable us to simulate albedo and incorporate six types of sky scenarios, facilitating the demonstration of UV light intensity reaching the eye across various environments worldwide.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116263091","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

Design of a two-fluorophore pH biosensor targeted to the digestive vacuole of Plasmodium falciparum 针对恶性疟原虫消化液泡的双荧光pH生物传感器的设计

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175358

Vitória Baptista, Rita Lozano, S. Catarino, M. Veiga

{"title":"Design of a two-fluorophore pH biosensor targeted to the digestive vacuole of Plasmodium falciparum","authors":"Vitória Baptista, Rita Lozano, S. Catarino, M. Veiga","doi":"10.1109/ENBENG58165.2023.10175358","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175358","url":null,"abstract":"The maintenance of pH homeostasis is critical for biological processes in all organisms, with the malaria parasite, Plasmodium falciparum, being no exception. The parasite food vacuole is a major acidic digestive organelle, where the pH is thought to be regulated by proton pumps in its membrane. The acidic environment promotes the action of enzymes involved in hemoglobin degradation, and polymerization of toxic heme into hemozoin. This biological process is vital for the parasite and a proven chemotherapeutic target. Thus, determining the pH dynamics along the parasite life cycle and in the context of antimalarial drugs might provide unique information about the parasite pathophysiology, cell metabolism and function, shedding light into drugs mechanism of action and possibly target(s) disclosure. To reliably measure the pH of P.falciparum digestive vacuole along its life cycle, we designed a genetically encoded fluorescent sensor strategy, consisting of fusing the ratiometric pHLuorin2 with emiRFP670 to the falcipain-2 protein, a cysteine protease located in this compartment.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116605341","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

Cardiac Surgery Equipment - Operation Principles and Maintenance Procedures 心脏手术设备。操作原理和维护程序

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175362

Lívia Pinto, F. Coutinho, João Silva

引用次数: 0

Plastic Optical Fiber Sensor for Handgrip Force Monitoring During Physical Rehabilitation 用于物理康复过程中握力监测的塑料光纤传感器

2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG) Pub Date : 2023-06-22 DOI: 10.1109/ENBENG58165.2023.10175364

Matilde Rocha, P. Antunes, P. André, N. Alberto, M. F. Domingues

{"title":"Plastic Optical Fiber Sensor for Handgrip Force Monitoring During Physical Rehabilitation","authors":"Matilde Rocha, P. Antunes, P. André, N. Alberto, M. F. Domingues","doi":"10.1109/ENBENG58165.2023.10175364","DOIUrl":"https://doi.org/10.1109/ENBENG58165.2023.10175364","url":null,"abstract":"According to the World Health Organization, there are about 2.3 million new annual breast cancer (BC) cases. Knowing that after surgery BC survivors (BCSs) frequently report a decrease on their muscle activity and a reduction on their fine motor skills, it is fundamental that the rehabilitation process starts right after surgery, focusing on the upper limb function recovery. One of the faculties commonly affected during the treatment, is the handgrip capacity. Its rehabilitation process requires a close monitoring of the typically prescribed exercises, which is most often done based on qualitative observation, provided only during the physical therapy sessions. The capacity to quantitatively evaluate the rehabilitation process, both from home or in a clinic scenario, represents an added value to the rehabilitation process for the medical staff and for the BCS itself. Targeting the improvement of the BCS rehabilitation process, it is proposed a low-cost plastic optical fiber (POF) sensor for handgrip force monitoring during the performance of exercises designed for its rehabilitation. The tool designed presented a sensitivity of (-7 ± 1) m V/N, demonstrating a good performance during the execution of different handspring exercises and the capacity to evaluate the maximum effort from different subjects, for the same exercise.","PeriodicalId":125330,"journal":{"name":"2023 IEEE 7th Portuguese Meeting on Bioengineering (ENBENG)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128958663","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