Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088831
M. Couto, M. Machado, R. Neto
Summary form only given. Physical and emotional problems can be prominent whenever a significant loss of a critical part of the face or body (e.g., nose, ears, eyes and fingers) is involved. Resulting from neoplasms, congenital malformations, burns, trauma, among others, the solution for these external defects, whenever a surgical reconstruction is impractical or counter-indicated, are conventionally addressed by an anaplastologist, who produces customised prostheses throughout a manual and time-consuming procedure via lifecasting techniques. Currently, advances on computational technologies have given rise to a digital-based method. This approach is used herein for the design and fabrication of personalised silicone prostheses. In this work, an efficient and cost-effective manufacturing methodology, able to produce accurate prostheses with a high-resolution level (e.g. wrinkles, fingerprints) is proposed. This framework entails six tasks: (i) data acquisition, (ii) 3D reconstruction, (iii) prosthesis design, (iv) mould fabrication, (v) prosthesis manufacturing and, (vi) final fittings [1]. First, regarding data acquisition, two technologies are taken into consideration, namely medical imaging or 3D scanning photometry. After the 3D reconstruction, for the prosthesis design, 3D measuring and design operations are carried out in an STL editor. This provides modelling tools targeting a good fitting between the surface models of the failing part and symmetric or donor organ. Also, a main issue to be addressed in this step is the fixation system, which is fundamental to ensure a good prosthesis retention. Following, a SLA-prototype is fabricated and the mould is produced via silicone casting. The prosthesis manufacturing is performed using pigmented silicon considering patient's skin tone. Nails, hair and/or extrinsic coloration may be include in order to accomplish a more realistic appearance of the prosthesis. The proposed approach showed encouraging outcomes, providing a comfortable solution, reducing the processing time, and disclosing excellent aesthetic results [1].
{"title":"On producing customised soft-tissue prostheses using digital tools and silicone casting techniques","authors":"M. Couto, M. Machado, R. Neto","doi":"10.1109/ENBENG.2015.7088831","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088831","url":null,"abstract":"Summary form only given. Physical and emotional problems can be prominent whenever a significant loss of a critical part of the face or body (e.g., nose, ears, eyes and fingers) is involved. Resulting from neoplasms, congenital malformations, burns, trauma, among others, the solution for these external defects, whenever a surgical reconstruction is impractical or counter-indicated, are conventionally addressed by an anaplastologist, who produces customised prostheses throughout a manual and time-consuming procedure via lifecasting techniques. Currently, advances on computational technologies have given rise to a digital-based method. This approach is used herein for the design and fabrication of personalised silicone prostheses. In this work, an efficient and cost-effective manufacturing methodology, able to produce accurate prostheses with a high-resolution level (e.g. wrinkles, fingerprints) is proposed. This framework entails six tasks: (i) data acquisition, (ii) 3D reconstruction, (iii) prosthesis design, (iv) mould fabrication, (v) prosthesis manufacturing and, (vi) final fittings [1]. First, regarding data acquisition, two technologies are taken into consideration, namely medical imaging or 3D scanning photometry. After the 3D reconstruction, for the prosthesis design, 3D measuring and design operations are carried out in an STL editor. This provides modelling tools targeting a good fitting between the surface models of the failing part and symmetric or donor organ. Also, a main issue to be addressed in this step is the fixation system, which is fundamental to ensure a good prosthesis retention. Following, a SLA-prototype is fabricated and the mould is produced via silicone casting. The prosthesis manufacturing is performed using pigmented silicon considering patient's skin tone. Nails, hair and/or extrinsic coloration may be include in order to accomplish a more realistic appearance of the prosthesis. The proposed approach showed encouraging outcomes, providing a comfortable solution, reducing the processing time, and disclosing excellent aesthetic results [1].","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125446643","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088862
Elisabete Silva, M. Parente, R. Jorge, T. Mascarenhas
The pelvic floor is made up of a set of soft tissue structures, supported by a network of muscles, which are in turn attached to each other and to the pelvis by condensations of fascial and fibromuscular tissues [1]. For clinical, technical and ethical reasons it is not possible to obtain the properties of these soft tissues in vivo. The utilization of Inverse Method is therefore required in order to obtain estimates for the mechanical properties of these structures. In this work, an optimization algorithm was implemented in order to obtain the optimal mechanical constants for the Mooney-Rivlin constitutive model [2]. The optimization algorithm uses the python scripting language to couple the Matlab® and Abaqus® software. The Powell's method was used for the optimization part of the algorithm.
{"title":"Using an inverse method for optimizing the material constants of the Mooney-Rivlin constitutive model","authors":"Elisabete Silva, M. Parente, R. Jorge, T. Mascarenhas","doi":"10.1109/ENBENG.2015.7088862","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088862","url":null,"abstract":"The pelvic floor is made up of a set of soft tissue structures, supported by a network of muscles, which are in turn attached to each other and to the pelvis by condensations of fascial and fibromuscular tissues [1]. For clinical, technical and ethical reasons it is not possible to obtain the properties of these soft tissues in vivo. The utilization of Inverse Method is therefore required in order to obtain estimates for the mechanical properties of these structures. In this work, an optimization algorithm was implemented in order to obtain the optimal mechanical constants for the Mooney-Rivlin constitutive model [2]. The optimization algorithm uses the python scripting language to couple the Matlab® and Abaqus® software. The Powell's method was used for the optimization part of the algorithm.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126016964","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088895
D. Mendes, N. Ferreira, J. Silva, F. Caramelo
In the medical field, the segmentation of organs and structures in the patient's body is a very important task to assist the study of morphological and pathological changes of organs. Normally, specialists perform manual segmentation, however it is time consuming, error-prone and observer-dependent. Here the experience of the expertise influences the quality of the ultimate results. This work aims to develop tools for automatic liver segmentation using data acquired with two medical imaging modalities: Computed Tomography and Positron Emission Tomography, in order to improve the way of obtaining volumes of object and to help the clinician in the study of the organ. Liver segmentation methods were developed for each modality separately and also for the combination of the two modalities. To validate the implemented algorithms, specialists delineated some images for each exam. The results of segmentation algorithms were then compared with the expert reference. The outputs obtained are reasonable and a good starting point for further work.
{"title":"3D liver segmentation in computed tomography and positron emission tomography exams through active surfaces","authors":"D. Mendes, N. Ferreira, J. Silva, F. Caramelo","doi":"10.1109/ENBENG.2015.7088895","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088895","url":null,"abstract":"In the medical field, the segmentation of organs and structures in the patient's body is a very important task to assist the study of morphological and pathological changes of organs. Normally, specialists perform manual segmentation, however it is time consuming, error-prone and observer-dependent. Here the experience of the expertise influences the quality of the ultimate results. This work aims to develop tools for automatic liver segmentation using data acquired with two medical imaging modalities: Computed Tomography and Positron Emission Tomography, in order to improve the way of obtaining volumes of object and to help the clinician in the study of the organ. Liver segmentation methods were developed for each modality separately and also for the combination of the two modalities. To validate the implemented algorithms, specialists delineated some images for each exam. The results of segmentation algorithms were then compared with the expert reference. The outputs obtained are reasonable and a good starting point for further work.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127868036","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088839
J. Oliveira, M. Castelo‐Branco, Ricardo Morais, S. Baptista, João Pereira
Multiple Sclerosis is a demyelinating disease affecting the communication in the central nervous system. Magnetic resonance diffusion imaging provides information about water diffusion in white matter and allows an early detection of abnormalities, comparing to conventional magnetic resonance techniques. The aim of this study is to find out which the brain regions that are damaged during disease progression. Tract-Based Spatial Statistics is a voxelwise multi-subject statistical analysis which performs non-linear registration of each subject's image and projects them onto an alignment-invariant tract representation where the statistical tests are accomplished. This approach improves the sensitivity, objectivity and interpretability of results. The study compares brain images of 64 healthy controls and 59 patients with different stages of Multiple Sclerosis. Some preliminary statistical tests were performed and although the results are still under study, it shows that corticospinal tracts as the most region affected by the disease.
{"title":"Analysis of multiple sclerosis DTI images that uses tract based spatial statistics","authors":"J. Oliveira, M. Castelo‐Branco, Ricardo Morais, S. Baptista, João Pereira","doi":"10.1109/ENBENG.2015.7088839","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088839","url":null,"abstract":"Multiple Sclerosis is a demyelinating disease affecting the communication in the central nervous system. Magnetic resonance diffusion imaging provides information about water diffusion in white matter and allows an early detection of abnormalities, comparing to conventional magnetic resonance techniques. The aim of this study is to find out which the brain regions that are damaged during disease progression. Tract-Based Spatial Statistics is a voxelwise multi-subject statistical analysis which performs non-linear registration of each subject's image and projects them onto an alignment-invariant tract representation where the statistical tests are accomplished. This approach improves the sensitivity, objectivity and interpretability of results. The study compares brain images of 64 healthy controls and 59 patients with different stages of Multiple Sclerosis. Some preliminary statistical tests were performed and although the results are still under study, it shows that corticospinal tracts as the most region affected by the disease.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114229143","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088877
P. Sampaio, B. Cunha, Filipa Rosa, K. Sales, M. Lopes, C. Calado
Helicobacter pylori infection represents a serious health problem, given its association with serious gastric diseases as gastric ulcers, cancer and MALT lymphoma. Currently no vaccine exists and antibiotic-based eradication therapy is already failing in more than 20% of cases. To increase the knowledge on the infection process diverse gastric cell lines, e.g. the adenocarcinona gastric (AGS) cell line, are routinely used has in vitro models of gastric epithelia. In the present work the molecular fingerprint of infected and non-infected AGS cell lines, by diverse H. pylori strains, was acquired using vibrational infrared spectroscopy. These molecular fingerprints enabled to discriminate infected from non-infected AGS cells, and infection due to different strains, by performing Principal Component Analysis. It was also possible to estimate, from the AGS cells molecular fingerprint, the effect of the infection on diverse biochemical and metabolic cellular status. In resume infra-red spectroscopy enabled the acquisition of infected AGS cells molecular fingerprint with minimal sample preparation, in a rapid, high-throughput, economic process yielding highly sensitive and informative data, most useful for promoting critical knowledge on the H. pylori infection process.
{"title":"Molecular fingerprint of human gastric cell line infected by Helicobacter pylori","authors":"P. Sampaio, B. Cunha, Filipa Rosa, K. Sales, M. Lopes, C. Calado","doi":"10.1109/ENBENG.2015.7088877","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088877","url":null,"abstract":"Helicobacter pylori infection represents a serious health problem, given its association with serious gastric diseases as gastric ulcers, cancer and MALT lymphoma. Currently no vaccine exists and antibiotic-based eradication therapy is already failing in more than 20% of cases. To increase the knowledge on the infection process diverse gastric cell lines, e.g. the adenocarcinona gastric (AGS) cell line, are routinely used has in vitro models of gastric epithelia. In the present work the molecular fingerprint of infected and non-infected AGS cell lines, by diverse H. pylori strains, was acquired using vibrational infrared spectroscopy. These molecular fingerprints enabled to discriminate infected from non-infected AGS cells, and infection due to different strains, by performing Principal Component Analysis. It was also possible to estimate, from the AGS cells molecular fingerprint, the effect of the infection on diverse biochemical and metabolic cellular status. In resume infra-red spectroscopy enabled the acquisition of infected AGS cells molecular fingerprint with minimal sample preparation, in a rapid, high-throughput, economic process yielding highly sensitive and informative data, most useful for promoting critical knowledge on the H. pylori infection process.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116218163","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088848
P. Rocha, M. Parente, T. Mascarenhas, A. Fernandes, R. Jorge
Pelvic organ prolapse (POP) is a medical condition characterized by the loss of support of the uterus, bladder or rectum, leading to its decay over the vagina. This condition affects about 75% of women from 50 years old, and about 11% of these will perform a prolapse correction surgery before being 80 years old. The most common treatment for this dysfunction is the implant of a synthetic mesh to complement the affected organ's support failure. Therefore, the effect of the mesh implant on the uterine displacement was studied through Finite Element Models (FEM). Several simulations were performed: healthy (without mesh) and dysfunctional (including the mesh and ligament damage). The ligaments' damage was simulated by modifying their mechanical properties. Comparing the results from the simulations, the mesh implant reduced the movement of the uterus to values closer to healthy ones.
{"title":"Effect of surgical mesh implant in the uterine prolapse correction","authors":"P. Rocha, M. Parente, T. Mascarenhas, A. Fernandes, R. Jorge","doi":"10.1109/ENBENG.2015.7088848","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088848","url":null,"abstract":"Pelvic organ prolapse (POP) is a medical condition characterized by the loss of support of the uterus, bladder or rectum, leading to its decay over the vagina. This condition affects about 75% of women from 50 years old, and about 11% of these will perform a prolapse correction surgery before being 80 years old. The most common treatment for this dysfunction is the implant of a synthetic mesh to complement the affected organ's support failure. Therefore, the effect of the mesh implant on the uterine displacement was studied through Finite Element Models (FEM). Several simulations were performed: healthy (without mesh) and dysfunctional (including the mesh and ligament damage). The ligaments' damage was simulated by modifying their mechanical properties. Comparing the results from the simulations, the mesh implant reduced the movement of the uterus to values closer to healthy ones.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128107880","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088872
C.S.S. Tavares, J. Belinha, L. Dinis, R. Jorge
In this work it is study how the remaining coronal dentin and type of rehabilitation influences the strain, the stress distribution, and the fracture resistance of restored teeth. Thus, an advance discretization numerical technique - a meshless method - is used to analyse the effects of the rehabilitation technical solutions on the biomechanical behaviour of restored teeth. The meshless method used in this work is the Natural Neighbour Radial Point Interpolation Method (NNRPIM). Within the NNRPIM, the Natural Neighbour concept is used in order to enforce the nodal connectivity and to construct a node-depending background mesh. The NNRPIM interpolation functions possess the delta Kronecker property, which simplify the imposition of the natural and essential boundary condition. The objective of this work is to extend and validate the NNRPIM to the elasto-static numerical analysis of restored maxillary molar. Several numerical examples are analysed and the obtained results are compared with clinical cases.
{"title":"The numerical analysis of a restored tooth using meshless methods","authors":"C.S.S. Tavares, J. Belinha, L. Dinis, R. Jorge","doi":"10.1109/ENBENG.2015.7088872","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088872","url":null,"abstract":"In this work it is study how the remaining coronal dentin and type of rehabilitation influences the strain, the stress distribution, and the fracture resistance of restored teeth. Thus, an advance discretization numerical technique - a meshless method - is used to analyse the effects of the rehabilitation technical solutions on the biomechanical behaviour of restored teeth. The meshless method used in this work is the Natural Neighbour Radial Point Interpolation Method (NNRPIM). Within the NNRPIM, the Natural Neighbour concept is used in order to enforce the nodal connectivity and to construct a node-depending background mesh. The NNRPIM interpolation functions possess the delta Kronecker property, which simplify the imposition of the natural and essential boundary condition. The objective of this work is to extend and validate the NNRPIM to the elasto-static numerical analysis of restored maxillary molar. Several numerical examples are analysed and the obtained results are compared with clinical cases.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114941593","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088844
S. Pimenta, J. P. Carmo, R. G. Correia, G. Minas, E. M. Castanheira
Early detection of gastrointestinal (GI) cancers is one of most important concerns in medical field. Its detection at the earliest stage is crucial to increase the patient survival chances. Optical signals extraction and analysis, specifically diffuse reflectance and intrinsic fluorescence, may improve the ability to detect GI dysplasia, once some morphological and biochemical changes on the tissues (related with early cancer progression) can modify these signals' shape and intensity. The project under this paper aims to develop a chip-sized spectroscopy microsystem for the early detection of GI cancer. This paper presents the characterization of different dimensions pn-junction silicon photodiodes (n+/p-epilayer type) fabricated in a standard 0.7 μm CMOS process. An array comprising 16 of those photodiodes must be implemented for the diffuse reflectance and intrinsic fluorescence signals measurements. The main goal is to conclude about the photodiodes minimum dimensions, taking into account its capacity to extract the signals in the relevant spectral band (350 nm-750 nm), not comprising the microsystem dimensions. With this study, it can be concluded that a 100 × 100 μm2 active area presents a quantum efficiency suitable to extract diffuse reflectance signals, which was proven using a test phantom representative of a GI tissue.
{"title":"Characterization of silicon photodiodes for diffuse reflectance signal extraction","authors":"S. Pimenta, J. P. Carmo, R. G. Correia, G. Minas, E. M. Castanheira","doi":"10.1109/ENBENG.2015.7088844","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088844","url":null,"abstract":"Early detection of gastrointestinal (GI) cancers is one of most important concerns in medical field. Its detection at the earliest stage is crucial to increase the patient survival chances. Optical signals extraction and analysis, specifically diffuse reflectance and intrinsic fluorescence, may improve the ability to detect GI dysplasia, once some morphological and biochemical changes on the tissues (related with early cancer progression) can modify these signals' shape and intensity. The project under this paper aims to develop a chip-sized spectroscopy microsystem for the early detection of GI cancer. This paper presents the characterization of different dimensions pn-junction silicon photodiodes (n+/p-epilayer type) fabricated in a standard 0.7 μm CMOS process. An array comprising 16 of those photodiodes must be implemented for the diffuse reflectance and intrinsic fluorescence signals measurements. The main goal is to conclude about the photodiodes minimum dimensions, taking into account its capacity to extract the signals in the relevant spectral band (350 nm-750 nm), not comprising the microsystem dimensions. With this study, it can be concluded that a 100 × 100 μm2 active area presents a quantum efficiency suitable to extract diffuse reflectance signals, which was proven using a test phantom representative of a GI tissue.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132612202","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088802
Filipa Garcia, J. Ferreira, Paulo Ferreira, Stephane Cruz, M. Crisostomo, A. Coimbra
Summary form only given. Given the importance of the ability to drive the lower limbs to perform most daily activities for all people and knowing that there is a constant need to develop new ways to help people who do not fully make use of this ability, either by external or physical causes, a tool for motion rehabilitation is being developed. In the market there are already some products for leg rehabilitation. Pedal exercisers and static bicycles are the most common. Mostly, they are very rudimentary because its practise can't be controlled by the health staff through software. A number of them have virtual environments for simulation of outdoor exercise. Some products that aren't yet on the market have new and important features, like reacting to the patient's performance to optimize the rehabilitation process, through an adjustable resistant motor [1]. Other can stimulate patient's legs movement because of their motor, and alternate between cycling forward or backward [2]. There is also a prototype of one device that trains lower limbs bilaterally [3]. The rehabilitation device presented here is based on a kind of motor assisted bicycle, which will gradually be triggered, depending on the pressure exerted on the force sensors existing on the pedals, allowing to compensate the leg with mobility problems, helping it to perform the expected cycling movement. There is also a sensor to monitor the patient's heart rate. To obtain the pressure sensor and heart rate values a data acquisition system is used. It is connected to a computer and to the motor controller. With it, it is possible to perform motor control to ensure the efficiency of the treatment and the patient safety. There is also the capability of exercising each leg with different parameters, which represents a very useful advantage for stroke patients, and can also compensate for a missing or impaired limb by mimicking the performance of the healthy leg. A computer interface allows the physiotherapist in charge to make a responsible management and an efficient monitoring of the equipment. It is expected to test a prototype in a public hospital soon.
{"title":"Active pedal exerciser for leg rehabilitation","authors":"Filipa Garcia, J. Ferreira, Paulo Ferreira, Stephane Cruz, M. Crisostomo, A. Coimbra","doi":"10.1109/ENBENG.2015.7088802","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088802","url":null,"abstract":"Summary form only given. Given the importance of the ability to drive the lower limbs to perform most daily activities for all people and knowing that there is a constant need to develop new ways to help people who do not fully make use of this ability, either by external or physical causes, a tool for motion rehabilitation is being developed. In the market there are already some products for leg rehabilitation. Pedal exercisers and static bicycles are the most common. Mostly, they are very rudimentary because its practise can't be controlled by the health staff through software. A number of them have virtual environments for simulation of outdoor exercise. Some products that aren't yet on the market have new and important features, like reacting to the patient's performance to optimize the rehabilitation process, through an adjustable resistant motor [1]. Other can stimulate patient's legs movement because of their motor, and alternate between cycling forward or backward [2]. There is also a prototype of one device that trains lower limbs bilaterally [3]. The rehabilitation device presented here is based on a kind of motor assisted bicycle, which will gradually be triggered, depending on the pressure exerted on the force sensors existing on the pedals, allowing to compensate the leg with mobility problems, helping it to perform the expected cycling movement. There is also a sensor to monitor the patient's heart rate. To obtain the pressure sensor and heart rate values a data acquisition system is used. It is connected to a computer and to the motor controller. With it, it is possible to perform motor control to ensure the efficiency of the treatment and the patient safety. There is also the capability of exercising each leg with different parameters, which represents a very useful advantage for stroke patients, and can also compensate for a missing or impaired limb by mimicking the performance of the healthy leg. A computer interface allows the physiotherapist in charge to make a responsible management and an efficient monitoring of the equipment. It is expected to test a prototype in a public hospital soon.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132816180","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}
Pub Date : 2015-02-01DOI: 10.1109/ENBENG.2015.7088841
Sara Setas, E. Seabra, L. F. Silva, H. Puga, C. Pombo, J. Mendes
The standard practice of dental extraction is performed using rigid instruments in a process involving high mechanical strength and a post-operative painful for patients. This work presents the stages of design and development of an instrument capable of acting in the most critical phase of the process, with induction of vibration at high frequencies, and it is expected to decrease the required the extraction force to perform as well as damages caused by the present procedure.
{"title":"Implementation of a multivibrational medical device to assist the removal of teeth and roots","authors":"Sara Setas, E. Seabra, L. F. Silva, H. Puga, C. Pombo, J. Mendes","doi":"10.1109/ENBENG.2015.7088841","DOIUrl":"https://doi.org/10.1109/ENBENG.2015.7088841","url":null,"abstract":"The standard practice of dental extraction is performed using rigid instruments in a process involving high mechanical strength and a post-operative painful for patients. This work presents the stages of design and development of an instrument capable of acting in the most critical phase of the process, with induction of vibration at high frequencies, and it is expected to decrease the required the extraction force to perform as well as damages caused by the present procedure.","PeriodicalId":285567,"journal":{"name":"2015 IEEE 4th Portuguese Meeting on Bioengineering (ENBENG)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124077645","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：