Pub Date : 2007-12-26DOI: 10.1109/ITAB.2007.4407366
José M. Vázquez, Marcos Martínez, M. G. López, B. González-Conde, F. Arnal, J. Pereira, Alejandro Pazos
Cancer is caused by a variety of factors whose study requires a large amount of data. Compiling these data is an expensive and time-consuming task which can be carried out in a better way with the support of Information and Communication Technologies (ICT). However, most epidemiologic studies take place without this support of informatics or with basic tools that are developed by unqualified professionals. As a consequence, the integrity of the compiled data cannot be guaranteed, and the reliability of the studies is affected. This work presents an Information System (IS) for the development of multicenter epidemiologic studies on cancer which has been successfully applied to the execution of an epidemiologic study of colorectal cancer in Galicia, Spain.
{"title":"Development of an Information System for Multicenter Epidemiologic Studies on Cancer","authors":"José M. Vázquez, Marcos Martínez, M. G. López, B. González-Conde, F. Arnal, J. Pereira, Alejandro Pazos","doi":"10.1109/ITAB.2007.4407366","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407366","url":null,"abstract":"Cancer is caused by a variety of factors whose study requires a large amount of data. Compiling these data is an expensive and time-consuming task which can be carried out in a better way with the support of Information and Communication Technologies (ICT). However, most epidemiologic studies take place without this support of informatics or with basic tools that are developed by unqualified professionals. As a consequence, the integrity of the compiled data cannot be guaranteed, and the reliability of the studies is affected. This work presents an Information System (IS) for the development of multicenter epidemiologic studies on cancer which has been successfully applied to the execution of an epidemiologic study of colorectal cancer in Galicia, Spain.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133436337","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407397
M. Khezri, M. Jahed
Electromyogram signal is a biopotential signal that may be measured on the surface of contracting muscles representing neuromuscular activities. This signal may be utilized in various applications such as clinical diagnosis of diseased neuromuscular systems and as a measurement tool for evaluation of rehabilitation activities. Another recent application is the usage of EMG signal in design and implementation of neural controlled prosthesis hands. For this purpose appropriate features of EMG signal are required such that intended hand movements may be recognized correctly. In this work we considered a new method based on quadratic time-frequency representation namely Wigner-Ville distribution (WVD) to extract required information. In the proposed approach, initially WVD coefficients for each class were calculated. Next average coefficients for all the signals in each class were obtained. Then cross-WVD was found by using acquired average WVD coefficients with signals in each class and finally the number of zero crossing (ZC) of cross-WVD coefficients were utilized as suitable features. Our proposed approach provided satisfactory results with a recognition average accuracy rate of 91.3% for six classes of movements. On the other hand, for unprocessed (raw) WVD coefficients the average accuracy of the six hand movements was registered at %33.7.
{"title":"An Inventive Quadratic Time-Frequency Scheme Based on Wigner-Ville Distribution for Classification of sEMG Signals","authors":"M. Khezri, M. Jahed","doi":"10.1109/ITAB.2007.4407397","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407397","url":null,"abstract":"Electromyogram signal is a biopotential signal that may be measured on the surface of contracting muscles representing neuromuscular activities. This signal may be utilized in various applications such as clinical diagnosis of diseased neuromuscular systems and as a measurement tool for evaluation of rehabilitation activities. Another recent application is the usage of EMG signal in design and implementation of neural controlled prosthesis hands. For this purpose appropriate features of EMG signal are required such that intended hand movements may be recognized correctly. In this work we considered a new method based on quadratic time-frequency representation namely Wigner-Ville distribution (WVD) to extract required information. In the proposed approach, initially WVD coefficients for each class were calculated. Next average coefficients for all the signals in each class were obtained. Then cross-WVD was found by using acquired average WVD coefficients with signals in each class and finally the number of zero crossing (ZC) of cross-WVD coefficients were utilized as suitable features. Our proposed approach provided satisfactory results with a recognition average accuracy rate of 91.3% for six classes of movements. On the other hand, for unprocessed (raw) WVD coefficients the average accuracy of the six hand movements was registered at %33.7.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131768404","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407417
I.R.F. Yan, Y.T. Zhang
This project deals with the development of a new standard for evaluating the cuff-less wearable blood pressure (BP) measuring devices. The reasons for this need are as follows: (1) the present studies show that the existing evaluation methods for validating the conventional BP devices do not agree with each other in all circumstances; and (2) the protocols set up for conventional devices fall short of accurate evaluation for the newly developed wearable BP measurement devices, since the new devices use completely different measurement techniques from those of the conventional cuff-based ones. These cuff-less techniques enable the new devices not only to be noninvasive, miniature in size, low-power consumption, cost-effective, and durable but also to have the potential to measure the beat-to-beat continuous BP. To analyze the measuring accuracy of a wearable cuff-less BP device, a total of 999 datasets from 85 subjects were collected. As the BP decreased, an obvious decrease of the variation in the measurement error was observed. This phenomenon may have been caused by the new technique that the device uses. It leads to some difficulties in evaluating the performance of cuff-less BP devices by some existing standards. In order to remove or reduce this unwanted trend, a transformation method was carefully examined. Based on the transformed datasets, traditional evaluation approaches are then applicable.
{"title":"The Evaluation of Wearable Cuff-less Blood Pressure Measuring Devices","authors":"I.R.F. Yan, Y.T. Zhang","doi":"10.1109/ITAB.2007.4407417","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407417","url":null,"abstract":"This project deals with the development of a new standard for evaluating the cuff-less wearable blood pressure (BP) measuring devices. The reasons for this need are as follows: (1) the present studies show that the existing evaluation methods for validating the conventional BP devices do not agree with each other in all circumstances; and (2) the protocols set up for conventional devices fall short of accurate evaluation for the newly developed wearable BP measurement devices, since the new devices use completely different measurement techniques from those of the conventional cuff-based ones. These cuff-less techniques enable the new devices not only to be noninvasive, miniature in size, low-power consumption, cost-effective, and durable but also to have the potential to measure the beat-to-beat continuous BP. To analyze the measuring accuracy of a wearable cuff-less BP device, a total of 999 datasets from 85 subjects were collected. As the BP decreased, an obvious decrease of the variation in the measurement error was observed. This phenomenon may have been caused by the new technique that the device uses. It leads to some difficulties in evaluating the performance of cuff-less BP devices by some existing standards. In order to remove or reduce this unwanted trend, a transformation method was carefully examined. Based on the transformed datasets, traditional evaluation approaches are then applicable.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125534463","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407401
K. Neophytou, C. Nicolaou, C. Pattichis, C. Schizas
Genetic Programming is a heuristic search algorithm inspired by evolutionary techniques that has been shown to produce satisfactory solutions to problems related to several scientific domains [1]. Presented here is a methodology for the creation of Quantitative Structure-Activity Relationship (QSAR) models for the prediction of chemical activity, using Genetic Programming. QSAR analysis is crucial for drug discovery since good QSAR models enable human experts to select compounds with increased chances of being active for further investigations. Our technique has been tested using the Selwood dataset, a benchmark dataset for the QSAR field [2]. The results indicate that the QSAR models created are accurate, reliable and simple and can thus be used to identify molecular descriptors correlated with measured activity and for the prediction of the activity of untested molecules. The QSAR models we generated predict the activity of untested molecules with an error ranging between 0.46 -0.8 on the scale [-1,1]. These results compare favourably with results sited in the literature for the same dataset [3], [4], Our models are constructed using any combination of the arithmetic operators {+, -, /, *}, the descriptors available and constant values.
{"title":"Deriving Quantitative Structure-Activity Relationship Models Using Genetic Programming for Drug Discovery","authors":"K. Neophytou, C. Nicolaou, C. Pattichis, C. Schizas","doi":"10.1109/ITAB.2007.4407401","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407401","url":null,"abstract":"Genetic Programming is a heuristic search algorithm inspired by evolutionary techniques that has been shown to produce satisfactory solutions to problems related to several scientific domains [1]. Presented here is a methodology for the creation of Quantitative Structure-Activity Relationship (QSAR) models for the prediction of chemical activity, using Genetic Programming. QSAR analysis is crucial for drug discovery since good QSAR models enable human experts to select compounds with increased chances of being active for further investigations. Our technique has been tested using the Selwood dataset, a benchmark dataset for the QSAR field [2]. The results indicate that the QSAR models created are accurate, reliable and simple and can thus be used to identify molecular descriptors correlated with measured activity and for the prediction of the activity of untested molecules. The QSAR models we generated predict the activity of untested molecules with an error ranging between 0.46 -0.8 on the scale [-1,1]. These results compare favourably with results sited in the literature for the same dataset [3], [4], Our models are constructed using any combination of the arithmetic operators {+, -, /, *}, the descriptors available and constant values.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131142549","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407389
D. D. Costa, LucioFlavio Campost, Allan Kardec Barros, A. Silva
Female breast cancer is the major cause of death in western countries. Efforts in computer vision have been made in order to help improving the diagnostic accuracy by radiologists. In this paper, we present a methodology that uses Independent Component Analysis (ICA) along with Support Vector Machine (SVM) and Linear Discriminant Analysis (LDA) to distinguish between Mass or Non-Mass and Benign or Malign tissues from mammograms. As a result, we found the following: LDA reaches 89,5% of accuracy to discriminante Mass or Non-Mass and 95,2% to discriminate Benign or Malignant in DDSM database and in MIAS database we obtained 85 % to discriminate Mass or Non-Mass and 88% of to discriminate Benign or Malignant; SVM reaches 99,6% of accuracy to discriminate Mass or Non-Mass and 99,5% to discriminate Benign or Malignat in DDSM database and in MIAS database we obtained 97% to discriminate Mass or Non-Mass and 100% to discriminate Benign or Malignant.
{"title":"Independent Component Analysis in Breast Tissues Mammograms Images Classification Using LDA and SVM","authors":"D. D. Costa, LucioFlavio Campost, Allan Kardec Barros, A. Silva","doi":"10.1109/ITAB.2007.4407389","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407389","url":null,"abstract":"Female breast cancer is the major cause of death in western countries. Efforts in computer vision have been made in order to help improving the diagnostic accuracy by radiologists. In this paper, we present a methodology that uses Independent Component Analysis (ICA) along with Support Vector Machine (SVM) and Linear Discriminant Analysis (LDA) to distinguish between Mass or Non-Mass and Benign or Malign tissues from mammograms. As a result, we found the following: LDA reaches 89,5% of accuracy to discriminante Mass or Non-Mass and 95,2% to discriminate Benign or Malignant in DDSM database and in MIAS database we obtained 85 % to discriminate Mass or Non-Mass and 88% of to discriminate Benign or Malignant; SVM reaches 99,6% of accuracy to discriminate Mass or Non-Mass and 99,5% to discriminate Benign or Malignat in DDSM database and in MIAS database we obtained 97% to discriminate Mass or Non-Mass and 100% to discriminate Benign or Malignant.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"200 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122530037","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407364
Guangchao Zheng, Lixu Gu, Xiaobo Li, Jingsi Zhang
This paper presents a construction of a computer assisted system in dental implantology. Preoperative planning and surgical navigation are two main sub-systems in our proposed system. In the preoperative planning subsystem, we provide different kinds of views to the surgeons based on CT data scanned for a specific patient. And the surgical navigation subsystem uses an infra-red light based navigation camera to locate the precise position of the surgical instrument. The two subsystems will combine together to form a seamless linked all-in-one system for dental implantological surgery. Due to the tight connection between the two subsystems, the depth and orientation of drilling will be tracked under the same coordinate space, which will guarantee the accuracy of match between the preoperative planned position and the realtime navigated position. The main objective of this paper is to present how to build such a system under the direct clinical requirement from dentists. At last, the experiments in phantom study demonstrate that the mean errors of the depth and the angle are 0.772 (mm) and 0.554 (degree) respectively
{"title":"Computer-assisted Preoperative Planning and Surgical Navigation System in Dental Implantology","authors":"Guangchao Zheng, Lixu Gu, Xiaobo Li, Jingsi Zhang","doi":"10.1109/ITAB.2007.4407364","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407364","url":null,"abstract":"This paper presents a construction of a computer assisted system in dental implantology. Preoperative planning and surgical navigation are two main sub-systems in our proposed system. In the preoperative planning subsystem, we provide different kinds of views to the surgeons based on CT data scanned for a specific patient. And the surgical navigation subsystem uses an infra-red light based navigation camera to locate the precise position of the surgical instrument. The two subsystems will combine together to form a seamless linked all-in-one system for dental implantological surgery. Due to the tight connection between the two subsystems, the depth and orientation of drilling will be tracked under the same coordinate space, which will guarantee the accuracy of match between the preoperative planned position and the realtime navigated position. The main objective of this paper is to present how to build such a system under the direct clinical requirement from dentists. At last, the experiments in phantom study demonstrate that the mean errors of the depth and the angle are 0.772 (mm) and 0.554 (degree) respectively","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"149 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127483812","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407374
J.M. Kim, J.H. Hong, E. Cha, T.S. Lee
The objective of the present study is to develop a system that can measure ECG and BCG of a patient on wheelchair moving or pausing and transmit measured signals to a remote server through CDMA (code division multiple access) network. In order to acquire ECG and BCG, the system has an amplifier for each signal, and records the signals on a SD card through an A/D converter. In addition, it is equipped with a 3-axis acceleration sensor to remove physical noises that may happen while driving the wheelchair and the data are also stored in the SD card. Data recorded in the SD card is transmitted to a remote server using a CDMA module (BSM-860s of Bellwave Co.), and if an event takes place in the patient, 48 Kbyte data stored for the last 32 seconds are transmitted to the remote server. It was programmed using C# of Microsoft that ECG, BCG and 3-axis acceleration data transmitted to the server through CDMA network are displayed. In conclusion, this study developed a system that acquires both ECG and BCG simultaneously from patients on wheelchair and, on the happening of an event, transmits the data to a remote server through CDMA network.
{"title":"Development of ECG and BCG Measuring System on Moving Wheelchair Using CDMA Network","authors":"J.M. Kim, J.H. Hong, E. Cha, T.S. Lee","doi":"10.1109/ITAB.2007.4407374","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407374","url":null,"abstract":"The objective of the present study is to develop a system that can measure ECG and BCG of a patient on wheelchair moving or pausing and transmit measured signals to a remote server through CDMA (code division multiple access) network. In order to acquire ECG and BCG, the system has an amplifier for each signal, and records the signals on a SD card through an A/D converter. In addition, it is equipped with a 3-axis acceleration sensor to remove physical noises that may happen while driving the wheelchair and the data are also stored in the SD card. Data recorded in the SD card is transmitted to a remote server using a CDMA module (BSM-860s of Bellwave Co.), and if an event takes place in the patient, 48 Kbyte data stored for the last 32 seconds are transmitted to the remote server. It was programmed using C# of Microsoft that ECG, BCG and 3-axis acceleration data transmitted to the server through CDMA network are displayed. In conclusion, this study developed a system that acquires both ECG and BCG simultaneously from patients on wheelchair and, on the happening of an event, transmits the data to a remote server through CDMA network.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131797355","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407369
A. Jayatilleke, A. Jayatilleke, C. A. Marasinghe, S. Nakahara, S. Lambacher, S. Nandasara
Without increased effort and new initiatives, the total number of road traffic deaths and injuries worldwide could rise by some 65 percent between 2000 and 2020, while deaths in low and middle income countries are expected to increase by 80 percent. Hence prevention is the best remedy for this global public health problem. For the effective prevention of road traffic injuries, accurate information on modes, patterns and trends of traffic injuries are mandatory. WHO is encouraging the establishment of such data collection systems by publishing guidelines on injury surveillance. We compared the data fields of the existing traffic injury surveillance systems of the Asian countries of Thailand, Cambodia, Sri Lanka, and Japan with WHO guidelines and examined the possibilities of compiling a global database. Although the surveillance systems of these four countries share a lot of similarities, there are variations in code choices. In spite of such variations, RTI data can be integrated into a common global data bases by applying information technology.
{"title":"A Global Prototype for Traffic Injury Surveillance System","authors":"A. Jayatilleke, A. Jayatilleke, C. A. Marasinghe, S. Nakahara, S. Lambacher, S. Nandasara","doi":"10.1109/ITAB.2007.4407369","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407369","url":null,"abstract":"Without increased effort and new initiatives, the total number of road traffic deaths and injuries worldwide could rise by some 65 percent between 2000 and 2020, while deaths in low and middle income countries are expected to increase by 80 percent. Hence prevention is the best remedy for this global public health problem. For the effective prevention of road traffic injuries, accurate information on modes, patterns and trends of traffic injuries are mandatory. WHO is encouraging the establishment of such data collection systems by publishing guidelines on injury surveillance. We compared the data fields of the existing traffic injury surveillance systems of the Asian countries of Thailand, Cambodia, Sri Lanka, and Japan with WHO guidelines and examined the possibilities of compiling a global database. Although the surveillance systems of these four countries share a lot of similarities, there are variations in code choices. In spite of such variations, RTI data can be integrated into a common global data bases by applying information technology.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132241080","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407372
K. Kim, I. Lee, S. Choi, S.S. Kim, T.S. Lee, E. Cha
Conductive rubber belt with electrical resistance changed by lengthening was incorporated within the patient's pants, which operated as a waist band transducer. The resistance changes induced by the abdominal dimension variation during breathing were converted into a voltage signal by a bridge circuit, then digitized followed by wireless transmission with zigbee protocol. The wireless transmission module was implemented small enough to carry conveniently in pocket. The wireless receiver module was also made to forward the signal to a local computer station through RS232 serial communication port, where respiration was monitored. CO2 inhalation experiments were performed in 4 normal men to evaluate measurement accuracy in the tidal volume(VT). 0~5% CO2 inhalation for a few minutes increased VT upto approximately twice in steady state with corresponding increase in the abdominal signal. Customized calibration by CO2 inhalation experiment for each subject resulted a mean relative error of 8% perhaps acceptable for general monitoring purposes. The present results enable wireless remote monitoring of respiration, thus could be applied to a ubiquitous health care system.
{"title":"Wearable transducer to monitor respiration in a wireless way","authors":"K. Kim, I. Lee, S. Choi, S.S. Kim, T.S. Lee, E. Cha","doi":"10.1109/ITAB.2007.4407372","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407372","url":null,"abstract":"Conductive rubber belt with electrical resistance changed by lengthening was incorporated within the patient's pants, which operated as a waist band transducer. The resistance changes induced by the abdominal dimension variation during breathing were converted into a voltage signal by a bridge circuit, then digitized followed by wireless transmission with zigbee protocol. The wireless transmission module was implemented small enough to carry conveniently in pocket. The wireless receiver module was also made to forward the signal to a local computer station through RS232 serial communication port, where respiration was monitored. CO2 inhalation experiments were performed in 4 normal men to evaluate measurement accuracy in the tidal volume(VT). 0~5% CO2 inhalation for a few minutes increased VT upto approximately twice in steady state with corresponding increase in the abdominal signal. Customized calibration by CO2 inhalation experiment for each subject resulted a mean relative error of 8% perhaps acceptable for general monitoring purposes. The present results enable wireless remote monitoring of respiration, thus could be applied to a ubiquitous health care system.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"69 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113943471","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 : 2007-12-26DOI: 10.1109/ITAB.2007.4407383
K. Murakami, T. Uchiyama
Measurements of subcutaneous fat thickness provide valuable information regarding human health. In previous studies, subcutaneous fat thickness was estimated by bioelectrical impedance; however, this method required sophisticated equipment and analysis. The objective of this study was to develop a simple method to determine subcutaneous fat thickness using apparent resistivity. A single-frequency 50-kHz bipolar pulse was applied to a tetrapolar electrode, while steady-state pulses were used to determine the apparent resistivity. Subcutaneous fat thickness was determined using ultrasound tomography. We obtained a linear correlation of R = 0.916 between subcutaneous fat thickness and apparent resistivity from measurements at 20 sites on a human anterior thigh. The obtained regression equation suggests that subcutaneous fat thickness can be estimated using the apparent resistivity.
{"title":"Bioelectrical Impedance Measurement of Subcutaneous Fat Thickness Using Apparent Resistivity","authors":"K. Murakami, T. Uchiyama","doi":"10.1109/ITAB.2007.4407383","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407383","url":null,"abstract":"Measurements of subcutaneous fat thickness provide valuable information regarding human health. In previous studies, subcutaneous fat thickness was estimated by bioelectrical impedance; however, this method required sophisticated equipment and analysis. The objective of this study was to develop a simple method to determine subcutaneous fat thickness using apparent resistivity. A single-frequency 50-kHz bipolar pulse was applied to a tetrapolar electrode, while steady-state pulses were used to determine the apparent resistivity. Subcutaneous fat thickness was determined using ultrasound tomography. We obtained a linear correlation of R = 0.916 between subcutaneous fat thickness and apparent resistivity from measurements at 20 sites on a human anterior thigh. The obtained regression equation suggests that subcutaneous fat thickness can be estimated using the apparent resistivity.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128735944","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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