Pub Date : 2016-05-15DOI: 10.1109/MeMeA.2016.7533731
L. Frighetto-Pereira, G. A. Metzner, P. M. A. Marques, M. Nogueira-Barbosa, Foad Oloumi, R. Rangayyan
Vertebral compression fractures (VCFs) present as partial collapses of vertebral bodies and may occur secondary to osteoporosis bone fragility and to metastatic cancer infiltration. The correct diagnosis of nontraumatic VCFs is therefore, fundamental for correct treatment. We aimed to classify VCFs using T1-weighted magnetic resonance images (MRI) of the lumbar spine acquired in the sagittal plane. Our study group comprised 63 patients (38 women and 25 men). From these patients 102 lumbar VCFs (53 benign and 49 malignant) and 89 normal vertebral bodies were manually segmented. The principal axis of each vertebral body region of interest was identified using moments. Statistical features of height and width measured perpendicular and parallel to the principal axis were computed. The k-nearest-neighbor method, a neural network with radial basis functions, and the naïve Bayes classifier were used with feature selection for classification. Areas under the receiver operating characteristic curve of 0.96 in the recognition of VCFs as compared with normal vertebral bodies and 0.73 for the classification of benign versus malignant VCFs were obtained. The proposed methods are promising for the recognition of VCFs, but additional features are needed to improve the classification of benign versus malignant VCFs.
{"title":"Recognition of vertebral compression fractures in magnetic resonance images using statistics of height and width","authors":"L. Frighetto-Pereira, G. A. Metzner, P. M. A. Marques, M. Nogueira-Barbosa, Foad Oloumi, R. Rangayyan","doi":"10.1109/MeMeA.2016.7533731","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533731","url":null,"abstract":"Vertebral compression fractures (VCFs) present as partial collapses of vertebral bodies and may occur secondary to osteoporosis bone fragility and to metastatic cancer infiltration. The correct diagnosis of nontraumatic VCFs is therefore, fundamental for correct treatment. We aimed to classify VCFs using T1-weighted magnetic resonance images (MRI) of the lumbar spine acquired in the sagittal plane. Our study group comprised 63 patients (38 women and 25 men). From these patients 102 lumbar VCFs (53 benign and 49 malignant) and 89 normal vertebral bodies were manually segmented. The principal axis of each vertebral body region of interest was identified using moments. Statistical features of height and width measured perpendicular and parallel to the principal axis were computed. The k-nearest-neighbor method, a neural network with radial basis functions, and the naïve Bayes classifier were used with feature selection for classification. Areas under the receiver operating characteristic curve of 0.96 in the recognition of VCFs as compared with normal vertebral bodies and 0.73 for the classification of benign versus malignant VCFs were obtained. The proposed methods are promising for the recognition of VCFs, but additional features are needed to improve the classification of benign versus malignant VCFs.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128897457","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533776
J. Bai, S. Mohanasankar, V. Kumar
A method for determining the concentration of hemoglobin in arterial blood, non invasively, is explored in this paper. A permanent magnet is placed just above the radial artery of a person whose hemoglobin concentration is to be ascertained. The flux produced by the permanent magnet (that links with the blood flow in the radial artery) is sensed to obtain a signal called magnetic plethysmogram (MPG). In this paper, an analytical model for a magnetic plethysmogram is derived. Using the proposed analytical model, a method of estimation of the concentration of hemoglobin in arterial blood is derived. The proposed method is then validated through a limited clinical study. The results of the clinical study establish the viability of measuring hemoglobin concentration, noninvasively, using magnetic plethysmogram.
{"title":"Non-invasive measurement of hemoglobin concentration using magnetic plethysmo gram","authors":"J. Bai, S. Mohanasankar, V. Kumar","doi":"10.1109/MeMeA.2016.7533776","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533776","url":null,"abstract":"A method for determining the concentration of hemoglobin in arterial blood, non invasively, is explored in this paper. A permanent magnet is placed just above the radial artery of a person whose hemoglobin concentration is to be ascertained. The flux produced by the permanent magnet (that links with the blood flow in the radial artery) is sensed to obtain a signal called magnetic plethysmogram (MPG). In this paper, an analytical model for a magnetic plethysmogram is derived. Using the proposed analytical model, a method of estimation of the concentration of hemoglobin in arterial blood is derived. The proposed method is then validated through a limited clinical study. The results of the clinical study establish the viability of measuring hemoglobin concentration, noninvasively, using magnetic plethysmogram.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132537950","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533772
F. Corona, M. Pau, M. Guicciardi, Mauro Murgia, Roberta Pili, Carlo Casula
Assessment of gait abnormalities in individuals affected by Parkinson's Disease (PD) is essential in evaluating the disease progression and the effectiveness of pharmacologic and rehabilitative treatments. However, in the clinical routine qualitative and subjective methods are often employed to this aim, despite the availability of sophisticated equipment able to supply accurate and detailed quantitative information. In this study, we propose the use of motion capture systems based on optoelectronic stereophotogrammetry to investigate the main spatio-temporal and kinematics parameters of gait in a cohort of 28 individuals with PD of age > 60. In particular, we aimed to describe the gait kinematics on the basis of concise measures (Gait Profile Score, GPS and Gait Variable Score, GVS) obtained from a quantitative three-dimensional analysis of gait. The results show that peculiar features are identifiable, especially in terms of functional limitations of hip and knee joints and confirm the validity of the GPS approach to describe the deviations from a physiologic gait pattern. Such method might be very useful in helping clinicians to detect even subtle changes in gait patterns (that would be impossible to observe with other techniques) consequent to either pharmacologic or rehabilitative treatments.
{"title":"Quantitative assessment of gait in elderly people affected by Parkinson's Disease","authors":"F. Corona, M. Pau, M. Guicciardi, Mauro Murgia, Roberta Pili, Carlo Casula","doi":"10.1109/MeMeA.2016.7533772","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533772","url":null,"abstract":"Assessment of gait abnormalities in individuals affected by Parkinson's Disease (PD) is essential in evaluating the disease progression and the effectiveness of pharmacologic and rehabilitative treatments. However, in the clinical routine qualitative and subjective methods are often employed to this aim, despite the availability of sophisticated equipment able to supply accurate and detailed quantitative information. In this study, we propose the use of motion capture systems based on optoelectronic stereophotogrammetry to investigate the main spatio-temporal and kinematics parameters of gait in a cohort of 28 individuals with PD of age > 60. In particular, we aimed to describe the gait kinematics on the basis of concise measures (Gait Profile Score, GPS and Gait Variable Score, GVS) obtained from a quantitative three-dimensional analysis of gait. The results show that peculiar features are identifiable, especially in terms of functional limitations of hip and knee joints and confirm the validity of the GPS approach to describe the deviations from a physiologic gait pattern. Such method might be very useful in helping clinicians to detect even subtle changes in gait patterns (that would be impossible to observe with other techniques) consequent to either pharmacologic or rehabilitative treatments.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129764534","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533789
S. Karthik, M. Sivaprakasam, J. Joseph, S. Preejith
We study the potential of reflectance photoplethysmography (PPG) in monitoring free flaps for arterial and venous thrombosis in post-surgical scenarios. Circulatory disruptions due to thrombosis were simulated using limb ischemia method on 30 volunteers. Arterial and venous occlusions were conducted in this study. The variation in blood flow in the region of interest was captured by a custom built sensor and data acquisition system using dual wavelength reflectance photoplethysmography. The main chromophores in blood, oxygenated and reduced hemoglobin, showed good variation to visible - near infrared wavelengths with concentration and volume changes. Sensitivity of the prototype device in detecting arterial and venous circulation disruptions was evaluated at various different threshold levels of signal parameters. The device showed strong capability to accurately detect circulatory disruptions and has potential in post-surgical monitoring of free flaps.
{"title":"A reflectance photoplethysmography based device to detect circulatory disruptions","authors":"S. Karthik, M. Sivaprakasam, J. Joseph, S. Preejith","doi":"10.1109/MeMeA.2016.7533789","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533789","url":null,"abstract":"We study the potential of reflectance photoplethysmography (PPG) in monitoring free flaps for arterial and venous thrombosis in post-surgical scenarios. Circulatory disruptions due to thrombosis were simulated using limb ischemia method on 30 volunteers. Arterial and venous occlusions were conducted in this study. The variation in blood flow in the region of interest was captured by a custom built sensor and data acquisition system using dual wavelength reflectance photoplethysmography. The main chromophores in blood, oxygenated and reduced hemoglobin, showed good variation to visible - near infrared wavelengths with concentration and volume changes. Sensitivity of the prototype device in detecting arterial and venous circulation disruptions was evaluated at various different threshold levels of signal parameters. The device showed strong capability to accurately detect circulatory disruptions and has potential in post-surgical monitoring of free flaps.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132459803","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533771
P. Hitchcott, M. C. Fastame, M. P. Penna, M. Agus
Several studies show that both positive mental health in late adulthood and longevity are positively associated with indices of psychological well-being (e.g., life satisfaction, coping) and negatively associated with signs of depression. However, the self-assessment of mental health in the elderly may be biased by social desirability as they attempt to present themselves more positively in order to impress the interlocutor and preserve their social image. A primary aim of the current study was to explore whether social desirability influenced self-assessment of depression in a sample of cognitively healthy elderly people residing in Sardinia, an Italian isle characterized by higher longevity indexes. Moreover, it was investigated the relationship between perceived physical health and depression and whether this relationship was impacted by social desirability. Each participant was presented a battery of inventories including measures of metacognitive efficiency, subjective well-being, depression, socially desirability. Overall, An ANCOVA and a path analysis highlighted the role played by social desirability on participants' self-assessment of mental health. The implications of these findings with respect to current research trends and clinical practice will be discussed.
{"title":"Do elderly people fake in the assessment of their mental health?","authors":"P. Hitchcott, M. C. Fastame, M. P. Penna, M. Agus","doi":"10.1109/MeMeA.2016.7533771","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533771","url":null,"abstract":"Several studies show that both positive mental health in late adulthood and longevity are positively associated with indices of psychological well-being (e.g., life satisfaction, coping) and negatively associated with signs of depression. However, the self-assessment of mental health in the elderly may be biased by social desirability as they attempt to present themselves more positively in order to impress the interlocutor and preserve their social image. A primary aim of the current study was to explore whether social desirability influenced self-assessment of depression in a sample of cognitively healthy elderly people residing in Sardinia, an Italian isle characterized by higher longevity indexes. Moreover, it was investigated the relationship between perceived physical health and depression and whether this relationship was impacted by social desirability. Each participant was presented a battery of inventories including measures of metacognitive efficiency, subjective well-being, depression, socially desirability. Overall, An ANCOVA and a path analysis highlighted the role played by social desirability on participants' self-assessment of mental health. The implications of these findings with respect to current research trends and clinical practice will be discussed.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129632606","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533728
D. L. Carní, D. Grimaldi, P. F. Sciammarella, A. Nastro, F. Lamonaca, M. Vasile
In the mineral part of the teeth the calcium phosphates and calcium carbonates are combined in a collagen with the mucopolysaccharides of the organic matrix. The infection on the tooth surface caused by bacteria can modify the tooth structures resulting in the tooth decay. In order to determine the modification on the tooth structure the use of thermal analysis technique is proposed. With this aim is fundamental the definition of an experimental protocol for the preparation of the sample under examination that does not modify the structure of the tooth. Preliminary experimental results confirm the capability of the measurement technique pointed out to correctly classify the modification of the tooth structure due to the aging or the carious.
{"title":"Measurement technique for the healty and carious teeth based on thermal analysis","authors":"D. L. Carní, D. Grimaldi, P. F. Sciammarella, A. Nastro, F. Lamonaca, M. Vasile","doi":"10.1109/MeMeA.2016.7533728","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533728","url":null,"abstract":"In the mineral part of the teeth the calcium phosphates and calcium carbonates are combined in a collagen with the mucopolysaccharides of the organic matrix. The infection on the tooth surface caused by bacteria can modify the tooth structures resulting in the tooth decay. In order to determine the modification on the tooth structure the use of thermal analysis technique is proposed. With this aim is fundamental the definition of an experimental protocol for the preparation of the sample under examination that does not modify the structure of the tooth. Preliminary experimental results confirm the capability of the measurement technique pointed out to correctly classify the modification of the tooth structure due to the aging or the carious.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129261370","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533703
Alberto López, Francisco Javier Ferrero Martín, M. Valledor, Juan Carlos Campo Rodríguez, O. Postolache
The eye acts as a dipole between the cornea (positive potential) and the retina (negative potential) which causes an electric field around the eyeball. Therefore, when humans make saccadic eye movements, they generate signals relative to this potential called electrooculography (EOG) signals. These signals can be measured by placing electrodes near the eye. Different electrode configurations can be employed to acquire the EOG signals. The properties of these signals change depending on the number and placement of the electrodes. Therefore, this paper presents a comparative study of electrode placement used to measure EOG signals. In order to support this study a low-cost signal acquisition hardware was developed. It enables the comparison of different electrode placements while showing the particularities of each one. The aim of this study is to analyse which electrode configuration could be best for medical applications.
{"title":"A study on electrode placement in EOG systems for medical applications","authors":"Alberto López, Francisco Javier Ferrero Martín, M. Valledor, Juan Carlos Campo Rodríguez, O. Postolache","doi":"10.1109/MeMeA.2016.7533703","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533703","url":null,"abstract":"The eye acts as a dipole between the cornea (positive potential) and the retina (negative potential) which causes an electric field around the eyeball. Therefore, when humans make saccadic eye movements, they generate signals relative to this potential called electrooculography (EOG) signals. These signals can be measured by placing electrodes near the eye. Different electrode configurations can be employed to acquire the EOG signals. The properties of these signals change depending on the number and placement of the electrodes. Therefore, this paper presents a comparative study of electrode placement used to measure EOG signals. In order to support this study a low-cost signal acquisition hardware was developed. It enables the comparison of different electrode placements while showing the particularities of each one. The aim of this study is to analyse which electrode configuration could be best for medical applications.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122943151","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 : 2016-05-15DOI: 10.1109/MEMEA.2016.7533791
E. Cinotti, J. Perrot, B. Labeille, F. Cambazard, R. Vie, A. Delalleau, L. Tognetti, P. Rubegni
Videodermoscopy has been used for the diagnosis of skin cancers and could be of potential interest to assess the quality of the skin in the cosmetic field, especially for the evaluation of skin color and xerosis. We evaluated whether it is possible to observe a variation of skin erythema, yellowness, pigmentation, color variance and xerosis induced by the season effect and the evaluated body site by using a new ultra-high definition videodermoscope. This videodermoscope provides images independent from the external lightening and reproducible. Videodermoscopy images were acquired at three body sites (photo-exposed forearm and face and photo-protected arm) of 149 elderly healthy volunteers. 79 subjects were evaluated in March and 70 subjects were evaluated in November. We found a difference in erythema, pigmentation, xerosis and yellowness in the two groups of subjects evaluated before and after the summer. As expected, erythema, pigmentation and xerosis increased and yellowness decreased after the summer. Some differences of these parameters were found in the three body sites independently from sun exposure. Videodermoscopy can provide quantitative data about both skin color and xerosis and in the future it could be used to evaluate different cosmetics and aesthetical procedures.
{"title":"Season and anatomic site effect on skin color and xerosis quantified using an ultra-high definition videodermoscope","authors":"E. Cinotti, J. Perrot, B. Labeille, F. Cambazard, R. Vie, A. Delalleau, L. Tognetti, P. Rubegni","doi":"10.1109/MEMEA.2016.7533791","DOIUrl":"https://doi.org/10.1109/MEMEA.2016.7533791","url":null,"abstract":"Videodermoscopy has been used for the diagnosis of skin cancers and could be of potential interest to assess the quality of the skin in the cosmetic field, especially for the evaluation of skin color and xerosis. We evaluated whether it is possible to observe a variation of skin erythema, yellowness, pigmentation, color variance and xerosis induced by the season effect and the evaluated body site by using a new ultra-high definition videodermoscope. This videodermoscope provides images independent from the external lightening and reproducible. Videodermoscopy images were acquired at three body sites (photo-exposed forearm and face and photo-protected arm) of 149 elderly healthy volunteers. 79 subjects were evaluated in March and 70 subjects were evaluated in November. We found a difference in erythema, pigmentation, xerosis and yellowness in the two groups of subjects evaluated before and after the summer. As expected, erythema, pigmentation and xerosis increased and yellowness decreased after the summer. Some differences of these parameters were found in the three body sites independently from sun exposure. Videodermoscopy can provide quantitative data about both skin color and xerosis and in the future it could be used to evaluate different cosmetics and aesthetical procedures.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123458993","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533765
M. Parvis, S. Grassini, E. Angelini, Pietro Scattareggia
Spinal diseases and spine curvature disorders often need swimming rehabilitation to recover as much as function as possible. During swimming sessions the trainer is able of discriminating by sight large movement problems connected to the back pain, but an automatic intelligent system capable to assess the presence of movement problems could help the swimmer doing therapy by him/herself. This paper describes a possible easy-to-use solution, which is based on four small inertial systems to be installed on wrists and ankles in order to follow the movements of legs and arms. The inertial systems are composed of a commercial miniaturized Inertial Measurement Unit and by a Teensyduino board, which is able to store up to ten thousand inertial samples enabling recording the swimming for about four minutes. Angular velocity and acceleration recorded by the inertial systems are then transferred to a computer via an USB cable and processed to obtain an indication of the swimming asymmetry. The paper describes the design and realization of the acquisition units and the first results obtained by some patients during their therapy.
{"title":"Swimming symmetry assessment via multiple inertial measurements","authors":"M. Parvis, S. Grassini, E. Angelini, Pietro Scattareggia","doi":"10.1109/MeMeA.2016.7533765","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533765","url":null,"abstract":"Spinal diseases and spine curvature disorders often need swimming rehabilitation to recover as much as function as possible. During swimming sessions the trainer is able of discriminating by sight large movement problems connected to the back pain, but an automatic intelligent system capable to assess the presence of movement problems could help the swimmer doing therapy by him/herself. This paper describes a possible easy-to-use solution, which is based on four small inertial systems to be installed on wrists and ankles in order to follow the movements of legs and arms. The inertial systems are composed of a commercial miniaturized Inertial Measurement Unit and by a Teensyduino board, which is able to store up to ten thousand inertial samples enabling recording the swimming for about four minutes. Angular velocity and acceleration recorded by the inertial systems are then transferred to a computer via an USB cable and processed to obtain an indication of the swimming asymmetry. The paper describes the design and realization of the acquisition units and the first results obtained by some patients during their therapy.","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121906387","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 : 2016-05-15DOI: 10.1109/MeMeA.2016.7533746
L. Gastaldi, V. Rosso, V. Gabola, V. Agostini, M. M. L. Frutos, M. Knaflitz, Ryo Takeda, S. Tadano
Magneto-Inertial Measurement Units (MIMUs) are gathering an increasing consensus in human motion analysis. However, applications such as clinical gait analysis require reliable, repeatable and accurate measurements of gait parameters up to a level that it is not easily achievable with MIMUs. We pointed out some specific technical challenges that we encountered in the use of the MIMUs-based H-gait system, pertaining to 1) calibration procedure and 2) high dispersion of ankle joint kinematic curves. We described how we solved these issues: 1) shifting from a manual to a semi-automatic calibration procedure and 2) obtaining an optimal MIMUs positioning on the foot. Joint kinematic results were validated against those acquired with a standard electromechanical system (STEP32).
{"title":"Technical challenges using magneto-inertial sensors for gait analysis","authors":"L. Gastaldi, V. Rosso, V. Gabola, V. Agostini, M. M. L. Frutos, M. Knaflitz, Ryo Takeda, S. Tadano","doi":"10.1109/MeMeA.2016.7533746","DOIUrl":"https://doi.org/10.1109/MeMeA.2016.7533746","url":null,"abstract":"Magneto-Inertial Measurement Units (MIMUs) are gathering an increasing consensus in human motion analysis. However, applications such as clinical gait analysis require reliable, repeatable and accurate measurements of gait parameters up to a level that it is not easily achievable with MIMUs. We pointed out some specific technical challenges that we encountered in the use of the MIMUs-based H-gait system, pertaining to 1) calibration procedure and 2) high dispersion of ankle joint kinematic curves. We described how we solved these issues: 1) shifting from a manual to a semi-automatic calibration procedure and 2) obtaining an optimal MIMUs positioning on the foot. Joint kinematic results were validated against those acquired with a standard electromechanical system (STEP32).","PeriodicalId":221120,"journal":{"name":"2016 IEEE International Symposium on Medical Measurements and Applications (MeMeA)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121337818","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}
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