Pub Date : 2015-03-23DOI: 10.1109/PAHCE.2015.7173317
J. J. Diaz, N. P. Castellanos, C. Pineda, C. Hernández, L. Ventura, J. Gutierrez
The paper presents an algorithm to evaluate the elasticity of biological tissues from an ultrasound acquired elastography images to enhance the diagnostic capabilities. The algorithm was applied to RGB images of four healthy subjects; including pre-processing, filtering, region of interest selection, segmentation and pixel computing stages. A Repeatability and Reproducibility method (R&R) based on average and range technique is used to validate the procedure. For this test, two physicians acquired the US elastography images from the same subjects in the same anatomic region, at the same time. An elastometry graph is obtained after interpolation of the three color maps is applied. According R&R guidelines, the results for repeatability and reproducibility for each plane (red, green and blue) were less to 10%. These results are indicative of an algorithm with good performance. This proposal represents a promising diagnostic tool to evaluate objectively the elasticity of biological tissue for diagnostic, treatment follow-up and research purposes.
{"title":"Algorithm to estimate the level of elasticity of biological tissue with ultrasound elastography images","authors":"J. J. Diaz, N. P. Castellanos, C. Pineda, C. Hernández, L. Ventura, J. Gutierrez","doi":"10.1109/PAHCE.2015.7173317","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173317","url":null,"abstract":"The paper presents an algorithm to evaluate the elasticity of biological tissues from an ultrasound acquired elastography images to enhance the diagnostic capabilities. The algorithm was applied to RGB images of four healthy subjects; including pre-processing, filtering, region of interest selection, segmentation and pixel computing stages. A Repeatability and Reproducibility method (R&R) based on average and range technique is used to validate the procedure. For this test, two physicians acquired the US elastography images from the same subjects in the same anatomic region, at the same time. An elastometry graph is obtained after interpolation of the three color maps is applied. According R&R guidelines, the results for repeatability and reproducibility for each plane (red, green and blue) were less to 10%. These results are indicative of an algorithm with good performance. This proposal represents a promising diagnostic tool to evaluate objectively the elasticity of biological tissue for diagnostic, treatment follow-up and research purposes.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"45 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":"127928557","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.2015.7173353
S. Delgado, L. Leija, A. Vera
High Intensity Focused Ultrasound (HIFU) is a non-invasive technique used for oncology treatment through tumor ablation. When an impedance mismatch is present between the ultrasound transducer and the excitation device, a reflected wave is produced which can damage the excitation device. To avoid this possible damage is important to know the forward and reflected power of ultrasound transducers. The purpose of this work is to develop a power meter which can measure the forward and reflected power of ultrasound transducers and calculate the Standing Wave Ratio with the finality to avoid damage at the excitation device.
{"title":"Power meter for HIFU transducers using logarithmic amplifiers","authors":"S. Delgado, L. Leija, A. Vera","doi":"10.1109/PAHCE.2015.7173353","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173353","url":null,"abstract":"High Intensity Focused Ultrasound (HIFU) is a non-invasive technique used for oncology treatment through tumor ablation. When an impedance mismatch is present between the ultrasound transducer and the excitation device, a reflected wave is produced which can damage the excitation device. To avoid this possible damage is important to know the forward and reflected power of ultrasound transducers. The purpose of this work is to develop a power meter which can measure the forward and reflected power of ultrasound transducers and calculate the Standing Wave Ratio with the finality to avoid damage at the excitation device.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"1 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":"131007384","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.2015.7173342
J. H. García, A. M. Hernandez, J. G. Barreneche
The metrological confirmation is one of the most widely used methodologies for guaranteeing the correct performance of biomedical equipment. This methodology consists of calibration, maintenance, and set-up with recalibration. Also, the correct selection of the equipment to be calibrated, maintenance frequencies, maximum allowed error and actions to be taken, makes crucial to have accurate methodologies for decision making, due to the high economic and social costs that a failure represents. The metrological confirmation model proposed in this paper is presented through following sections: (i) the characteristics of the equipment to be evaluated are defined, (ii) parameters for selecting the equipment to be calibrated, calibration frequencies and actions to be taken are established; and (iii) the cost of the metrological control is evaluated and the most convenient modality for the institution is defined. As a result, a model that allows designing and controlling the metrology process is proposed; also, this model permits simulating the creation of a laboratory, and taking decisions to make changes from processed real data.
{"title":"Methodology for metrological confirmation in health care institutions","authors":"J. H. García, A. M. Hernandez, J. G. Barreneche","doi":"10.1109/PAHCE.2015.7173342","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173342","url":null,"abstract":"The metrological confirmation is one of the most widely used methodologies for guaranteeing the correct performance of biomedical equipment. This methodology consists of calibration, maintenance, and set-up with recalibration. Also, the correct selection of the equipment to be calibrated, maintenance frequencies, maximum allowed error and actions to be taken, makes crucial to have accurate methodologies for decision making, due to the high economic and social costs that a failure represents. The metrological confirmation model proposed in this paper is presented through following sections: (i) the characteristics of the equipment to be evaluated are defined, (ii) parameters for selecting the equipment to be calibrated, calibration frequencies and actions to be taken are established; and (iii) the cost of the metrological control is evaluated and the most convenient modality for the institution is defined. As a result, a model that allows designing and controlling the metrology process is proposed; also, this model permits simulating the creation of a laboratory, and taking decisions to make changes from processed real data.","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":"123081665","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.2015.7173332
L. M. Rivera, A. Betancur, J. Bustamante, L. Hoyos
This article presents the Raman spectroscopy analysis of a polymeric, flexible and electrically conductive material which can be used to fabricate a dry ECG electrode. For the development of this material, polyaniline (Pani) was used as main matrix, the host matrix was an acrylic resin; and the material was reinforced with carbon nanotubes (MWCNTs) doped with Ag, and functionalized with Cl. It was found that the final composite material (FCM) had an electric resistance of 1000 Ω and an electrical conductivity of 0,002 S cm-1 for a material area of 0,01 m2. This FCM is being tested as a dry electrode for a new ECG system which is also being developed at the Centro de Bioingenieria of the Universidad Pontificia Bolivariana.
本文介绍了一种可用于制造干法ECG电极的聚合物柔性导电材料的拉曼光谱分析。该材料以聚苯胺(Pani)为主要基体，以丙烯酸树脂为基体;用掺杂Ag的碳纳米管(MWCNTs)增强材料，并用Cl进行功能化。结果发现，最终的复合材料(FCM)在材料面积为0.01 m2时，电阻为1000 Ω，电导率为0.002 S cm-1。这种FCM正在作为一种新的ECG系统的干电极进行测试，该系统也正在玻利维亚玻利瓦尔大学生物工程中心开发。
{"title":"Raman spectroscopy analysis of a flexible and electrically conductive material with applications as ECG electrode","authors":"L. M. Rivera, A. Betancur, J. Bustamante, L. Hoyos","doi":"10.1109/PAHCE.2015.7173332","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173332","url":null,"abstract":"This article presents the Raman spectroscopy analysis of a polymeric, flexible and electrically conductive material which can be used to fabricate a dry ECG electrode. For the development of this material, polyaniline (Pani) was used as main matrix, the host matrix was an acrylic resin; and the material was reinforced with carbon nanotubes (MWCNTs) doped with Ag, and functionalized with Cl. It was found that the final composite material (FCM) had an electric resistance of 1000 Ω and an electrical conductivity of 0,002 S cm-1 for a material area of 0,01 m2. This FCM is being tested as a dry electrode for a new ECG system which is also being developed at the Centro de Bioingenieria of the Universidad Pontificia Bolivariana.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"12 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":"115682478","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.2015.7173331
P. Mayorga, D. Ibarra, C. Druzgalski, V. Zeljkovic
This paper presents a methodology for optimized utilization of merged Hidden Markov Models and Mixed Gaussian Model to classify lung sounds (LS) and heart sounds (HS) as a part of cardiopulmonary diagnostic assessment. Specifically this method was used as a criterion to determine most advantageous number of clusters for the HMMGMM model calculation. For this purpose, the LS and HS characteristics were evaluated in terms of MFCC (Melfrequency cepstral coefficients) and Quantile vectors. The analysis for the number of clusters was based on utilization of dendrograms, silhouettes, and the Bayesian Information Criterion (BIC). The merged HMM-GMM models for LS signals with Quartiles offered excellent results, while for HS signals, the best results were obtained with MFCC vectors. In both groups of LS and HS signals, a high degree classification efficiency was obtained reaching 100% for studied sets of signals. In particular, the results demonstrate that utilizing BIC or dendrograms as a part of optimized criterion enhances efficiency of merged HMM-GMM models in diagnostic classification of cardiopulmonary acoustic signals.
{"title":"HMM-GMM model's size selection methodology for bioacoustics-based diagnostic classification","authors":"P. Mayorga, D. Ibarra, C. Druzgalski, V. Zeljkovic","doi":"10.1109/PAHCE.2015.7173331","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173331","url":null,"abstract":"This paper presents a methodology for optimized utilization of merged Hidden Markov Models and Mixed Gaussian Model to classify lung sounds (LS) and heart sounds (HS) as a part of cardiopulmonary diagnostic assessment. Specifically this method was used as a criterion to determine most advantageous number of clusters for the HMMGMM model calculation. For this purpose, the LS and HS characteristics were evaluated in terms of MFCC (Melfrequency cepstral coefficients) and Quantile vectors. The analysis for the number of clusters was based on utilization of dendrograms, silhouettes, and the Bayesian Information Criterion (BIC). The merged HMM-GMM models for LS signals with Quartiles offered excellent results, while for HS signals, the best results were obtained with MFCC vectors. In both groups of LS and HS signals, a high degree classification efficiency was obtained reaching 100% for studied sets of signals. In particular, the results demonstrate that utilizing BIC or dendrograms as a part of optimized criterion enhances efficiency of merged HMM-GMM models in diagnostic classification of cardiopulmonary acoustic signals.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"238 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":"115180042","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.2015.7173324
R. Espinosa, C. Tabernig
This work presents an alternative method for the pre-processing of surface electromyography signals of nociceptive withdrawal reflexes, with the goal of improving the reflexes detection in the records. The withdrawal reflex appears when a painful stimulus activates the nociceptors, the generated potential travels to the spinal cord and then the withdrawal of member exposed to painful stimulus is happened. The method used in this study to pre-process these reflexes is called a Coherent Self-Averaging method which attenuates the fluctuations of the random values of high frequency. The smoothing produced by the method is controlled by setting of two parameters: m and k. To demonstrate the performance in the detection of the reflex, 90 reflex signals of 15 healthy subjects were used. Its detection performance was compared with the one of the method called Teager-Kaiser energy operator. The reflex detection performance of algorithms was analyzed using the receiver operating characteristic curve. This showed that the Coherent Self-Averaging method, had a higher sensitivity and specificity than the Teager-Kaiser energy operator. Smoothing of signal, artifact attenuation (by electric stimulation) and reflex enhancement also was observed.
{"title":"Coherent self-averaging for the pre-processing of surface electromyography signals in the detection of nociceptive withdrawal reflexes","authors":"R. Espinosa, C. Tabernig","doi":"10.1109/PAHCE.2015.7173324","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173324","url":null,"abstract":"This work presents an alternative method for the pre-processing of surface electromyography signals of nociceptive withdrawal reflexes, with the goal of improving the reflexes detection in the records. The withdrawal reflex appears when a painful stimulus activates the nociceptors, the generated potential travels to the spinal cord and then the withdrawal of member exposed to painful stimulus is happened. The method used in this study to pre-process these reflexes is called a Coherent Self-Averaging method which attenuates the fluctuations of the random values of high frequency. The smoothing produced by the method is controlled by setting of two parameters: m and k. To demonstrate the performance in the detection of the reflex, 90 reflex signals of 15 healthy subjects were used. Its detection performance was compared with the one of the method called Teager-Kaiser energy operator. The reflex detection performance of algorithms was analyzed using the receiver operating characteristic curve. This showed that the Coherent Self-Averaging method, had a higher sensitivity and specificity than the Teager-Kaiser energy operator. Smoothing of signal, artifact attenuation (by electric stimulation) and reflex enhancement also was observed.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"116 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":"124298449","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.2015.7173341
M. B. S. Sánchez, A. Hernandez, C. Cortés, A. Serpa, M. Mananas, Y. Agudelo
Organophosphorus (OP) insecticides are widely used as pesticides and produce neuromuscular compromise after acute exposure, paralyzing the rib cage muscles and other muscles. The aim of this study was to evaluate respiratory muscle activity during a weaning test (WT) using eletromyographic signals from a group of six OP poisoned patients (29.5 ± 13.2 years, 68.0 ± 13.9 kg, 162.8 ± 10.6 cm height). High levels of spectral energy at low frequencies in the diaphragm muscle and weak synchronization with the sternocleidomastoid, which is an accessory respiratory muscle, correlated with the success of a weaning test.
{"title":"Respiratory muscle activity in patients with acute organophosphorus poisoning","authors":"M. B. S. Sánchez, A. Hernandez, C. Cortés, A. Serpa, M. Mananas, Y. Agudelo","doi":"10.1109/PAHCE.2015.7173341","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173341","url":null,"abstract":"Organophosphorus (OP) insecticides are widely used as pesticides and produce neuromuscular compromise after acute exposure, paralyzing the rib cage muscles and other muscles. The aim of this study was to evaluate respiratory muscle activity during a weaning test (WT) using eletromyographic signals from a group of six OP poisoned patients (29.5 ± 13.2 years, 68.0 ± 13.9 kg, 162.8 ± 10.6 cm height). High levels of spectral energy at low frequencies in the diaphragm muscle and weak synchronization with the sternocleidomastoid, which is an accessory respiratory muscle, correlated with the success of a weaning test.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"140 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":"124440709","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.2015.7173344
E. R. Mancipe-Toloza, S. A. Salinas
Development of a force control hardware embedded system for a Prototype of Prosthetic Gripper Hand with 1 grade of liberty is shown. A myoelectric signal is used to enable a servo motor movement which permits opening and closing the prosthesis. The prosthesis force is controlled with a Proportional and Integrative (PI) incremental control. Furthermore, a little vibrator motor acts like a haptic interface and it is put on the user arm; the prosthesis force applied against an object is related with the vibrator motor frequency.
{"title":"Force control and haptic interface applied to prototype of myoelectric prosthetic hand","authors":"E. R. Mancipe-Toloza, S. A. Salinas","doi":"10.1109/PAHCE.2015.7173344","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173344","url":null,"abstract":"Development of a force control hardware embedded system for a Prototype of Prosthetic Gripper Hand with 1 grade of liberty is shown. A myoelectric signal is used to enable a servo motor movement which permits opening and closing the prosthesis. The prosthesis force is controlled with a Proportional and Integrative (PI) incremental control. Furthermore, a little vibrator motor acts like a haptic interface and it is put on the user arm; the prosthesis force applied against an object is related with the vibrator motor frequency.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"49 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":"114424992","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.2015.7173325
J. G. Barreneche, A. M. Hernandez, J. H. García
The assessment of biomedical technology framed in the Ministry of Social Protection Decree # 4725 of 2005 performed as part of the acquisition processes is of great importance for health care institutions in Colombia.. Medical technology, being costly and complex, requires detailed processes with rigorous methodologies that guarantee an accurate assessment and transparent acquisition process. The most important aspects to consider, although not the only one is the economic assessment, which has always had a great weight in the assessment processes, even when not many variables are considered and financial projections over time are not always carried out. This paper aims to incorporate variables as the Total Cost of Ownership (TCO), the technology life cycle, and the Net Present Value, in the process of economic evaluation. Additionally, the paper presents one of the most representative results obtained in the acquisition processes carried out during the last five years in different health care institutions in Colombia, the assessment of a PET-CT using the proposed methodology.
{"title":"Analysis of total cost of ownership (TCO) applied to processes of biomedical technology acquisition competitive intelligence","authors":"J. G. Barreneche, A. M. Hernandez, J. H. García","doi":"10.1109/PAHCE.2015.7173325","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173325","url":null,"abstract":"The assessment of biomedical technology framed in the Ministry of Social Protection Decree # 4725 of 2005 performed as part of the acquisition processes is of great importance for health care institutions in Colombia.. Medical technology, being costly and complex, requires detailed processes with rigorous methodologies that guarantee an accurate assessment and transparent acquisition process. The most important aspects to consider, although not the only one is the economic assessment, which has always had a great weight in the assessment processes, even when not many variables are considered and financial projections over time are not always carried out. This paper aims to incorporate variables as the Total Cost of Ownership (TCO), the technology life cycle, and the Net Present Value, in the process of economic evaluation. Additionally, the paper presents one of the most representative results obtained in the acquisition processes carried out during the last five years in different health care institutions in Colombia, the assessment of a PET-CT using the proposed methodology.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"60 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":"124453047","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.2015.7173352
J. López, L. Leija, A. Vera
Breast cancer is one of the most common diseases and has high mortality among Mexican women. Thermic therapies are one of the most promising techniques these days. Microwave ablation transmits electromagnetic energy inducing a focalized temperature increment to achieve tumor necrosis in a minimally invasive way. One of the main limitations in the development of thermotherapy percutaneous applicators is the measurement of certain parameters in biological tissue. The proposed solution is the fabrication of a phantom that emulates the dielectric properties (permittivity and conductivity) of breast tumor tissue in order to make coupling measurements of the applicator in an experimental setting. A methodology for the fabrication and measurement of a breast tumor phantom was developed, achieving, with low error, the imitation of dielectric properties of the breast tumor tissue reported in the literature. The use of low-cost materials and the simplicity of the methodology allow reproducibility of the phantom for experimentation in the fields of diagnostic and treatment of breast cancer through RF in the microwave range.
{"title":"Development of fabrication method for a phantom emulating breast tumor tissue for percutaneous antenna coupling measurements in microwave thermotherapy","authors":"J. López, L. Leija, A. Vera","doi":"10.1109/PAHCE.2015.7173352","DOIUrl":"https://doi.org/10.1109/PAHCE.2015.7173352","url":null,"abstract":"Breast cancer is one of the most common diseases and has high mortality among Mexican women. Thermic therapies are one of the most promising techniques these days. Microwave ablation transmits electromagnetic energy inducing a focalized temperature increment to achieve tumor necrosis in a minimally invasive way. One of the main limitations in the development of thermotherapy percutaneous applicators is the measurement of certain parameters in biological tissue. The proposed solution is the fabrication of a phantom that emulates the dielectric properties (permittivity and conductivity) of breast tumor tissue in order to make coupling measurements of the applicator in an experimental setting. A methodology for the fabrication and measurement of a breast tumor phantom was developed, achieving, with low error, the imitation of dielectric properties of the breast tumor tissue reported in the literature. The use of low-cost materials and the simplicity of the methodology allow reproducibility of the phantom for experimentation in the fields of diagnostic and treatment of breast cancer through RF in the microwave range.","PeriodicalId":269877,"journal":{"name":"2015 Pan American Health Care Exchanges (PAHCE)","volume":"12 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":"132882336","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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