Pub Date : 2015-08-24DOI: 10.1109/PAHCE.2015.7173355
U. Garcia, L. Leija, A. Vera
This paper shows an instrument that uses electronic technology to characterize the effects of the diabetes in tissues, by measuring changes in the skin impedance on the sole. The bioimpedance system generates a signal at different frequencies and supplies it to the tissue via electrodes. This system uses the 3 electrodes technique: the first electrode where the generator signal wave at different frequencies is supplied, the second electrode receives the supplied signal with the modulation of the skin and the third electrode is the reference. Bioimpedance system 149 generates sinusoidal signals at different frequencies ranging from 10 Hz to 22 kHz and a amplitude current below the of perception of the human body. This signal is placed on the first electrode on the sole. With the meter bioimpedance can be characterized tissue impedance of the sole of healthy people with diabetes problems, Directory to locate differences that help to monitor the status of the foot in people with diabetes and prevent some complications of this disease.
{"title":"Proposal for monitoring the health status of a diabetic patient by using impedance spectroscopy measurement","authors":"U. Garcia, L. Leija, A. Vera","doi":"10.1109/PAHCE.2015.7173355","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173355","url":null,"abstract":"This paper shows an instrument that uses electronic technology to characterize the effects of the diabetes in tissues, by measuring changes in the skin impedance on the sole. The bioimpedance system generates a signal at different frequencies and supplies it to the tissue via electrodes. This system uses the 3 electrodes technique: the first electrode where the generator signal wave at different frequencies is supplied, the second electrode receives the supplied signal with the modulation of the skin and the third electrode is the reference. Bioimpedance system 149 generates sinusoidal signals at different frequencies ranging from 10 Hz to 22 kHz and a amplitude current below the of perception of the human body. This signal is placed on the first electrode on the sole. With the meter bioimpedance can be characterized tissue impedance of the sole of healthy people with diabetes problems, Directory to locate differences that help to monitor the status of the foot in people with diabetes and prevent some complications of this disease.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-08-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132369728","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173354
J. D. Gallego, Juan C Franco, J. Rios-Soto, F. Zuleta, Jairo J. Pérez
The main goal of this project was to develop a thermoregulatory machine that allows to determine the comfort levels of medical clothing under technical standards used in the production of these products in the market. The thermoregulatory machine was built according to the guidelines of the ISO 11092:1993 and ASTM F1868 - 14. The machine executes a control algorithm that reaches programed values related to humidity, temperature, power and flow velocity to simulate the conditions and effects of the skin. This device has a touchscreen where the results of the process are displayed and then determine the variations in the process and ensure the convergence of the values present.
{"title":"Medical clothing: machine for the calculation of comfort in clinical textiles","authors":"J. D. Gallego, Juan C Franco, J. Rios-Soto, F. Zuleta, Jairo J. Pérez","doi":"10.1109/PAHCE.2015.7173354","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173354","url":null,"abstract":"The main goal of this project was to develop a thermoregulatory machine that allows to determine the comfort levels of medical clothing under technical standards used in the production of these products in the market. The thermoregulatory machine was built according to the guidelines of the ISO 11092:1993 and ASTM F1868 - 14. The machine executes a control algorithm that reaches programed values related to humidity, temperature, power and flow velocity to simulate the conditions and effects of the skin. This device has a touchscreen where the results of the process are displayed and then determine the variations in the process and ensure the convergence of the values present.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127985784","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173329
M. Fry, C. Druzgalski
The emergence of more sophisticated full body plethysmograph systems has occurred over recent years reflecting necessity for broader testing of respiratory functions. Specific airway resistance (sRaw) and interthoratic gas volume (ITGV/TGV) or FRCpleth can provide more accurate measure of lung function utilizing a computerized full body plethysmograph. Clinics and/or specialized test facilities today could use this type of system for testing, evaluation, and long term monitoring of patients suspected of suffering from pulmonary disease of which there is no cure. Modern plethysmograph systems consist of having a self-contained workstation, specialized software, database and the PFT equipment. In the case when the dedicated pulmonary function test (PFT) workstation is unavailable, the respiration diagnostic capabilities of the clinic and/or test facility are reduced. Virtual machines (VMs) along with a cloud computing service can be used as remedy. Specifically, this project focused on implementation of three (Windows, Oracle, and VMWare based) independent standalone plethysmograph system VMs which were used for the PFT. The VMWare implementation offered the best options for access of PFT data with the shortest cloud service sync time and a method to improve the standardized PFT capabilities by providing a web based VM/cloud computing serialized collaboration environment for the clinic/specialized test facility.
{"title":"Virtual machine based PFT and new approach for serialized collaboration in the clinic/specialized test facility","authors":"M. Fry, C. Druzgalski","doi":"10.1109/PAHCE.2015.7173329","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173329","url":null,"abstract":"The emergence of more sophisticated full body plethysmograph systems has occurred over recent years reflecting necessity for broader testing of respiratory functions. Specific airway resistance (sRaw) and interthoratic gas volume (ITGV/TGV) or FRCpleth can provide more accurate measure of lung function utilizing a computerized full body plethysmograph. Clinics and/or specialized test facilities today could use this type of system for testing, evaluation, and long term monitoring of patients suspected of suffering from pulmonary disease of which there is no cure. Modern plethysmograph systems consist of having a self-contained workstation, specialized software, database and the PFT equipment. In the case when the dedicated pulmonary function test (PFT) workstation is unavailable, the respiration diagnostic capabilities of the clinic and/or test facility are reduced. Virtual machines (VMs) along with a cloud computing service can be used as remedy. Specifically, this project focused on implementation of three (Windows, Oracle, and VMWare based) independent standalone plethysmograph system VMs which were used for the PFT. The VMWare implementation offered the best options for access of PFT data with the shortest cloud service sync time and a method to improve the standardized PFT capabilities by providing a web based VM/cloud computing serialized collaboration environment for the clinic/specialized test facility.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"124 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134346478","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173356
A. E. Ruiz, D. Arboleda, J. Aristizábal
Patients admitted to the Intensive Care Unit (ICU) often have acute respiratory failure. Tracheal intubation, which is a routine procedure in the ICU, is related with a high frequency of complications because of the dangerous respiratory status of critically ill patients. Therefore, it is necessary to evaluate the state of the airways in patients intubated and mechanically ventilated, as well as endotracheal tube position. A 3D airway model has been used in order to model the air-flow. However, chest Computed Tomography (CT) image is needed in order to obtain a 3D model. This paper presents a non-rigid registration between a TC image obtained in ICU under critical conditions, and a CT image acquired under controlled conditions.
{"title":"Non-rigid registration of airway region in computed tomography of ICU patient using B-splines in 3D-slicer","authors":"A. E. Ruiz, D. Arboleda, J. Aristizábal","doi":"10.1109/PAHCE.2015.7173356","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173356","url":null,"abstract":"Patients admitted to the Intensive Care Unit (ICU) often have acute respiratory failure. Tracheal intubation, which is a routine procedure in the ICU, is related with a high frequency of complications because of the dangerous respiratory status of critically ill patients. Therefore, it is necessary to evaluate the state of the airways in patients intubated and mechanically ventilated, as well as endotracheal tube position. A 3D airway model has been used in order to model the air-flow. However, chest Computed Tomography (CT) image is needed in order to obtain a 3D model. This paper presents a non-rigid registration between a TC image obtained in ICU under critical conditions, and a CT image acquired under controlled conditions.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128903861","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173318
T. D. Costa, E. Losso, G. N. Nogueira-Neto, P. Nohama
The main cause of death in individuals with high thoracic paraplegia and quadriplegia is the complication of the respiratory system. Transcutaneous functional electrical stimulation (TFES) synchronized with spontaneous breathing is a possible technique for respiratory rehabilitation. In this paper, we introduce a new approach to synchronized TFES and the two main muscles of ventilation: diaphragmatic and abdominal. The system under development can automatically perform a double synchronization with TFES and ventilatory muscles. It uses strain gage sensors-based load cell coupled to an elastic belt that is positioned on the thoraco-abdominal region so as to acquire the respiratory signal, and a detection algorithm of inspiratory and expiratory events for synchronization of TFES. After testing in four healthy persons, it was concluded that the proposed sensing system can be employed in the acquisition of respiratory signals. The described algorithm can provide TFES synchronization with the patient in quasi-static situation.
{"title":"A new approach to improve pulmonary function in quadriplegic people using dual synchronized functional electrical stimulation","authors":"T. D. Costa, E. Losso, G. N. Nogueira-Neto, P. Nohama","doi":"10.1109/PAHCE.2015.7173318","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173318","url":null,"abstract":"The main cause of death in individuals with high thoracic paraplegia and quadriplegia is the complication of the respiratory system. Transcutaneous functional electrical stimulation (TFES) synchronized with spontaneous breathing is a possible technique for respiratory rehabilitation. In this paper, we introduce a new approach to synchronized TFES and the two main muscles of ventilation: diaphragmatic and abdominal. The system under development can automatically perform a double synchronization with TFES and ventilatory muscles. It uses strain gage sensors-based load cell coupled to an elastic belt that is positioned on the thoraco-abdominal region so as to acquire the respiratory signal, and a detection algorithm of inspiratory and expiratory events for synchronization of TFES. After testing in four healthy persons, it was concluded that the proposed sensing system can be employed in the acquisition of respiratory signals. The described algorithm can provide TFES synchronization with the patient in quasi-static situation.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132459834","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173323
L. Castellanos, I. Bazán, M. Gutiérrez, A. Ramírez-García
The present paper describes an approach to solve a forward problem of nonlinear wave propagation in inhomogeneous and linear attenuating media. The implementation was written in Matlab code, but the equations and algorithm described can be implemented in other programming languages. The object of this work is to create an algorithm of nonlinear wave solver that is useful for ultrasound research and the instruction of nonlinear and ultrasound acoustics, by simulations. In other cases, the model can be quickly and easily modified to address a range of simulation tasks or including improvements with GPUs or Cluster PCs. Validation of acoustics field absorption is showed and compared with Finite Element simulations.
{"title":"A 3D pseudospectral solver for nonlinear wave propagation in inhomogeneous attenuating media","authors":"L. Castellanos, I. Bazán, M. Gutiérrez, A. Ramírez-García","doi":"10.1109/PAHCE.2015.7173323","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173323","url":null,"abstract":"The present paper describes an approach to solve a forward problem of nonlinear wave propagation in inhomogeneous and linear attenuating media. The implementation was written in Matlab code, but the equations and algorithm described can be implemented in other programming languages. The object of this work is to create an algorithm of nonlinear wave solver that is useful for ultrasound research and the instruction of nonlinear and ultrasound acoustics, by simulations. In other cases, the model can be quickly and easily modified to address a range of simulation tasks or including improvements with GPUs or Cluster PCs. Validation of acoustics field absorption is showed and compared with Finite Element simulations.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133005535","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173351
V. Gonçalves, M. T. D. Melo, H. Costa, J. S. Melo, T. A. Morais, J. Lamas, L. Brasil
Virtual Reality (VR) has an immense potential of application and requires, in addition to a specific area where knowledge is applied, an in-depth knowledge of the disciplines of Science and Computing. Due to human-computer interaction approach of reality in a three-dimensional space, this feature becomes quite relevant to health. The current situation of education and training in the area of health presents some imperfections and challenges that need to be overcame. Thus, this paper presents the advantages of VR applied in the simulation of medical procedures, and highlights the three-dimensional (3D) modeling of structures of breast in the study of methods for detection of breast lumps.
{"title":"Computer simulation used in diagnostic procedures analysis of breast cancer","authors":"V. Gonçalves, M. T. D. Melo, H. Costa, J. S. Melo, T. A. Morais, J. Lamas, L. Brasil","doi":"10.1109/PAHCE.2015.7173351","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173351","url":null,"abstract":"Virtual Reality (VR) has an immense potential of application and requires, in addition to a specific area where knowledge is applied, an in-depth knowledge of the disciplines of Science and Computing. Due to human-computer interaction approach of reality in a three-dimensional space, this feature becomes quite relevant to health. The current situation of education and training in the area of health presents some imperfections and challenges that need to be overcame. Thus, this paper presents the advantages of VR applied in the simulation of medical procedures, and highlights the three-dimensional (3D) modeling of structures of breast in the study of methods for detection of breast lumps.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116619204","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173350
I. C. Muñoz, M. B. Salazar, A. M. Hernandez
Mechanical ventilation is a life-sustaining treatment that is used when gas exchange or ventilation processes are compromised. When the airways resistance of patient increases, the time span of the expiratory phase is insufficient to exhale all the inspired volume. In order to maintain oxygenation and to reduce the workload of respiratory muscles, it is common to apply an extrinsic positive end-expiratory pressure (PEEP) that counterbalances the increased airways resistance. Several studies have demonstrated the usefulness of surface electromyography (sEMG) to quantify the work of breathing (WOB), particularly in patients with obstructive diseases. This paper explores the usefulness of sEMG of diaphragm and sternomastoid muscles to evaluate the effect of incremental PEEP in a group of ten healthy male volunteers (23.5 ± 2.5 years, 73.1 ± 12.1 kg, 173.8 ± 5.55 cm height), noninvasively ventilated for 20 minutes. The extrinsic PEEP was applied from 0 to 5 cmH2O in steps of 1 cmH2O at 30 seconds each. The exploratory study provided different breathing patterns changes on response to incremental PEEP that could be related to the state of their ventilatory mechanics which suggest that sEMG is an interesting tool to identify the patient dynamic response to changes in PEEP.
{"title":"Exploring the usefulness of surface electromyography to evaluate the effect of PEEP on respiratory muscle activity during spontaneous ventilation","authors":"I. C. Muñoz, M. B. Salazar, A. M. Hernandez","doi":"10.1109/PAHCE.2015.7173350","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173350","url":null,"abstract":"Mechanical ventilation is a life-sustaining treatment that is used when gas exchange or ventilation processes are compromised. When the airways resistance of patient increases, the time span of the expiratory phase is insufficient to exhale all the inspired volume. In order to maintain oxygenation and to reduce the workload of respiratory muscles, it is common to apply an extrinsic positive end-expiratory pressure (PEEP) that counterbalances the increased airways resistance. Several studies have demonstrated the usefulness of surface electromyography (sEMG) to quantify the work of breathing (WOB), particularly in patients with obstructive diseases. This paper explores the usefulness of sEMG of diaphragm and sternomastoid muscles to evaluate the effect of incremental PEEP in a group of ten healthy male volunteers (23.5 ± 2.5 years, 73.1 ± 12.1 kg, 173.8 ± 5.55 cm height), noninvasively ventilated for 20 minutes. The extrinsic PEEP was applied from 0 to 5 cmH2O in steps of 1 cmH2O at 30 seconds each. The exploratory study provided different breathing patterns changes on response to incremental PEEP that could be related to the state of their ventilatory mechanics which suggest that sEMG is an interesting tool to identify the patient dynamic response to changes in PEEP.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"58 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113939038","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173346
M. Reyna, C. I. Lima, R. L. Avitia, M. Bravo
The cables that carry electrocardiographic (ECG) signal from the surface electrodes to the electrocardiograph play an important role in the production of undesirable artifacts (noise), especially when the patient moves, or for example in an ambulatory electrocardiography (Holter) or in a stress electrocardiogram. Even though it is highly desirable to keep the ECG signal as faithfully as possible since it is captured by the electrodes, techniques used to eliminate these artifacts degrade the ECG signal and many important components are altered. An electronic device, based on XBee technology in combination with the ZigBee protocol that takes heart signals from three different points of the Einthoven's triangle was built. In situ, each device processes each signal and transmits it wirelessly to an electrocardiograph, where the ECG can be stored or monitored.
{"title":"Wireless Electrodes for Electrocardiography","authors":"M. Reyna, C. I. Lima, R. L. Avitia, M. Bravo","doi":"10.1109/PAHCE.2015.7173346","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173346","url":null,"abstract":"The cables that carry electrocardiographic (ECG) signal from the surface electrodes to the electrocardiograph play an important role in the production of undesirable artifacts (noise), especially when the patient moves, or for example in an ambulatory electrocardiography (Holter) or in a stress electrocardiogram. Even though it is highly desirable to keep the ECG signal as faithfully as possible since it is captured by the electrodes, techniques used to eliminate these artifacts degrade the ECG signal and many important components are altered. An electronic device, based on XBee technology in combination with the ZigBee protocol that takes heart signals from three different points of the Einthoven's triangle was built. In situ, each device processes each signal and transmits it wirelessly to an electrocardiograph, where the ECG can be stored or monitored.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125611689","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 : 2015-03-23DOI: 10.1109/PAHCE.2015.7173326
G. Cortela, K. M. Lima, L. Maggi, C. Negreira, W. Pereira
A hydrogel-based (gellan gum) tissue mimicking material (TMM) was developed. Its acoustic and thermal properties were characterized. The hydrogel was combined with different sizes of glass spheres. The acoustic properties (attenuation coefficient and the speed of sound) were obtained as a function of the temperature range 20 to 45° C. Specific heat was determined experimentally by the standard mixture method for the same temperature range. The attenuation coefficient presented a quasi-linear dependence on the frequency, such as the most of mammalian tissues. The mean value was 0.59f 0,85 dB·cm-1, at 30° C from 1 to 10MHz. The results suggest that the developed TMM has potential for several applications: development of standard dosimetry techniques, validation numerical models and determination the efficacy of hyperthermia devices.
{"title":"Evaluation of acoustic and thermal properties of gellan-gum phantom to mimic biological tissue","authors":"G. Cortela, K. M. Lima, L. Maggi, C. Negreira, W. Pereira","doi":"10.1109/PAHCE.2015.7173326","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173326","url":null,"abstract":"A hydrogel-based (gellan gum) tissue mimicking material (TMM) was developed. Its acoustic and thermal properties were characterized. The hydrogel was combined with different sizes of glass spheres. The acoustic properties (attenuation coefficient and the speed of sound) were obtained as a function of the temperature range 20 to 45° C. Specific heat was determined experimentally by the standard mixture method for the same temperature range. The attenuation coefficient presented a quasi-linear dependence on the frequency, such as the most of mammalian tissues. The mean value was 0.59f 0,85 dB·cm-1, at 30° C from 1 to 10MHz. The results suggest that the developed TMM has potential for several applications: development of standard dosimetry techniques, validation numerical models and determination the efficacy of hyperthermia devices.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126237234","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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