Pub Date : 2007-12-26DOI: 10.1109/ITAB.2007.4407379
G. Chung, B. H. Choi, K. Kim, Y. Lim, J. Choi, D. Jeong, K. Park
Polysomnagraphy, the method evaluating the sleep quality, is the reliable and standard method. However, to perform it, subject has to attach many sensors to their body. It seems intrusive, tangled and interrupting the subjects sleep. For the sake of monitoring the daily sleep pattern, simple method measuring the biosignal nonintrusively is needed. At that point, respiration is a beneficial signal, because it can be easily acquired by check the change of the thorax or abdomen. Respiration is one of the representatives of the reflection of the autonomic nervous system. According to the transition of the sleep stages, autonomic nervous system also changes and it can be shown by respiration. In this study, REM and non-REM sleep is classified by only using respiration for the 3 subjects. To enhance the performance, activity signal acquired by load-cell installed bed is added to divide the wake and REM sleep. At the results, hypnograms with polysomnagraphic data is compared with them. It can be seen that high correlation between the REM sleep and increasing pattern of the respiration rates.
{"title":"REM Sleep Classification with Respiration Rates","authors":"G. Chung, B. H. Choi, K. Kim, Y. Lim, J. Choi, D. Jeong, K. Park","doi":"10.1109/ITAB.2007.4407379","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407379","url":null,"abstract":"Polysomnagraphy, the method evaluating the sleep quality, is the reliable and standard method. However, to perform it, subject has to attach many sensors to their body. It seems intrusive, tangled and interrupting the subjects sleep. For the sake of monitoring the daily sleep pattern, simple method measuring the biosignal nonintrusively is needed. At that point, respiration is a beneficial signal, because it can be easily acquired by check the change of the thorax or abdomen. Respiration is one of the representatives of the reflection of the autonomic nervous system. According to the transition of the sleep stages, autonomic nervous system also changes and it can be shown by respiration. In this study, REM and non-REM sleep is classified by only using respiration for the 3 subjects. To enhance the performance, activity signal acquired by load-cell installed bed is added to divide the wake and REM sleep. At the results, hypnograms with polysomnagraphic data is compared with them. It can be seen that high correlation between the REM sleep and increasing pattern of the respiration rates.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"153 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":"131762601","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.2007.4407395
Xiaowei Zhang, Jianming Lu, T. Yahagi
This paper studies a image show-through problem. It happens often when we copy or scan a paper document, in which the image from the back page shows through. The images obtained on both side of the paper can be considered as mixture components, which are nonlinear mixtures of original images. In this study, we propose to use self-organizing map (SOM) and fastICA to implement separation of the image mixtures. SOM is neural network-based technique using unsupervised learning and can provide useful data representations. The separation results show that the two blind separation methods are applicable to the problem.
{"title":"Blind Separation Methods for Image Show-through Problem","authors":"Xiaowei Zhang, Jianming Lu, T. Yahagi","doi":"10.1109/ITAB.2007.4407395","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407395","url":null,"abstract":"This paper studies a image show-through problem. It happens often when we copy or scan a paper document, in which the image from the back page shows through. The images obtained on both side of the paper can be considered as mixture components, which are nonlinear mixtures of original images. In this study, we propose to use self-organizing map (SOM) and fastICA to implement separation of the image mixtures. SOM is neural network-based technique using unsupervised learning and can provide useful data representations. The separation results show that the two blind separation methods are applicable to the problem.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"84 2-3 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":"132601759","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.2007.4407425
Y.T. Zhang, C. Poon
Meeting the long-term healthcare needs of the growing elderly population and escalating healthcare expenditure in China pose a grim challenge to the current healthcare system and the solvency of state budgets. Therefore, there is a great need of advanced technologies for more effective and low-cost healthcare to alleviate the burden of the current healthcare system. Based on the development of technologies for designing wearable medical devices and biosensors, the new micro-TU-COME techniques (i.e. micro-Terahertz techniques, micro-Ultrasound techniques, micro-Computer tomography, micro-Optical-mechanical-electro system, micro-Magnetic resonance imaging, and micro-Electrophysiological imaging) and general medical imaging facilities, an information system that can deliver multi-level, multi-dimensional healthcare services to urban and rural citizens is proposed to bridge individuals, homes, communities, and hospitals through a four-layer (PHCH) system structure. This four-layer structure should ensure people be monitored by the new system as closely as it can, resulting in the novel transformation of the function of healthcare systems from symptoms treatment to early risk detection and even prevention. It allows people to self-monitor their health conditions at their convenience in an attempt to lighten the workload of doctors and nurses. Moreover, more people can benefit from the new technologies and system with much lower medical insurance fees due to the reduced risk of developing severe diseases through regular, long-term and effective monitoring of citizens' health conditions.
{"title":"Innovative Biomedical Information Technologies for Low-cost Healthcare","authors":"Y.T. Zhang, C. Poon","doi":"10.1109/ITAB.2007.4407425","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407425","url":null,"abstract":"Meeting the long-term healthcare needs of the growing elderly population and escalating healthcare expenditure in China pose a grim challenge to the current healthcare system and the solvency of state budgets. Therefore, there is a great need of advanced technologies for more effective and low-cost healthcare to alleviate the burden of the current healthcare system. Based on the development of technologies for designing wearable medical devices and biosensors, the new micro-TU-COME techniques (i.e. micro-Terahertz techniques, micro-Ultrasound techniques, micro-Computer tomography, micro-Optical-mechanical-electro system, micro-Magnetic resonance imaging, and micro-Electrophysiological imaging) and general medical imaging facilities, an information system that can deliver multi-level, multi-dimensional healthcare services to urban and rural citizens is proposed to bridge individuals, homes, communities, and hospitals through a four-layer (PHCH) system structure. This four-layer structure should ensure people be monitored by the new system as closely as it can, resulting in the novel transformation of the function of healthcare systems from symptoms treatment to early risk detection and even prevention. It allows people to self-monitor their health conditions at their convenience in an attempt to lighten the workload of doctors and nurses. Moreover, more people can benefit from the new technologies and system with much lower medical insurance fees due to the reduced risk of developing severe diseases through regular, long-term and effective monitoring of citizens' health conditions.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"44 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":"114679195","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.2007.4407349
S. Jin, I.B. Lee, J.M. Han, K.S. Park
To overcome the resolution limitation in the visual prosthesis, various image processing methods have been proposed. These methods are limited for close-up images of faces or objects. However, images in real environment contain not only the predefined objects such as faces and letters but also unexpected visually-salient objects which give important information on the images. In this paper, we propose the region-of-interest detection method which is appropriate for real situations using a context-based model, and demonstrate that the detected region can guide attention. The gazes are estimated while subjects are watching two kinds of pixelized images obtained by a conventional method and the proposed method, and are compared with experimentally detected conspicuous region. The results show that the context-based model detecting visually-attractive region is useful to solve the resolution limitation.
{"title":"Visually-Salient Region Detection in the Pixelized Image using Context-Based Model","authors":"S. Jin, I.B. Lee, J.M. Han, K.S. Park","doi":"10.1109/ITAB.2007.4407349","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407349","url":null,"abstract":"To overcome the resolution limitation in the visual prosthesis, various image processing methods have been proposed. These methods are limited for close-up images of faces or objects. However, images in real environment contain not only the predefined objects such as faces and letters but also unexpected visually-salient objects which give important information on the images. In this paper, we propose the region-of-interest detection method which is appropriate for real situations using a context-based model, and demonstrate that the detected region can guide attention. The gazes are estimated while subjects are watching two kinds of pixelized images obtained by a conventional method and the proposed method, and are compared with experimentally detected conspicuous region. The results show that the context-based model detecting visually-attractive region is useful to solve the resolution limitation.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"42 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":"130733533","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.2007.4407373
Jonghee Han, Hongwon Kim, Suk-Bong Choi, K. Park
Physical activity assessment is useful for determining both physical and mental health. The measurement of activity has been performed by several techniques such as direct observations, subjective reports, metabolic measurements and portable physical activity monitors. Each type of technique has certain strengths and weaknesses. Recently, studies on portable physical activity monitors have been increasing and presented good assessment results. Upon consideration of the characteristics of the portable monitors such as being unconstrained and long-term monitoring, an indoor portable monitor was designed and developed. It measures three dimensional acceleration and transfers data by Zigbee protocol wirelessly. This system could help to assess daily activity without subject's consciousness.
{"title":"Indoor Activity Monitoring System Using an Accelerometer and Zigbee","authors":"Jonghee Han, Hongwon Kim, Suk-Bong Choi, K. Park","doi":"10.1109/ITAB.2007.4407373","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407373","url":null,"abstract":"Physical activity assessment is useful for determining both physical and mental health. The measurement of activity has been performed by several techniques such as direct observations, subjective reports, metabolic measurements and portable physical activity monitors. Each type of technique has certain strengths and weaknesses. Recently, studies on portable physical activity monitors have been increasing and presented good assessment results. Upon consideration of the characteristics of the portable monitors such as being unconstrained and long-term monitoring, an indoor portable monitor was designed and developed. It measures three dimensional acceleration and transfers data by Zigbee protocol wirelessly. This system could help to assess daily activity without subject's consciousness.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"46 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":"123167961","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.2007.4407371
M. Masilela, E. Hughes, C. Boanca, R. Merrell, A. Rafiq
In this paper, we present the VMOTE-II health monitoring system that measures and monitors, records and reports the vital signs of a patient to health care providers and medical personnel using both with wireless and wired technologies. This system delivers real time medical data approximately 3 times per second using medical sensors integrated in a single wearable and portable unit that is self powered. This system is geared towards patients that require 24 hour monitoring and support. VMOTE-II is a non-invasive system that would allow a patient to continue normal day to day activities with minimal inconvenience whilst providing extensive medical and physiological data.
{"title":"VMOTE-II, A Biowearable Health Monitoring System","authors":"M. Masilela, E. Hughes, C. Boanca, R. Merrell, A. Rafiq","doi":"10.1109/ITAB.2007.4407371","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407371","url":null,"abstract":"In this paper, we present the VMOTE-II health monitoring system that measures and monitors, records and reports the vital signs of a patient to health care providers and medical personnel using both with wireless and wired technologies. This system delivers real time medical data approximately 3 times per second using medical sensors integrated in a single wearable and portable unit that is self powered. This system is geared towards patients that require 24 hour monitoring and support. VMOTE-II is a non-invasive system that would allow a patient to continue normal day to day activities with minimal inconvenience whilst providing extensive medical and physiological data.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"179 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":"123033635","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.2007.4407353
M. De Lucia, C. Michel, S. Clarke, M. Murray
We present a novel approach for analyzing single-trial electroencephalography (EEG) data, using topographic information. The method allows for visualizing event-related potentials using all the electrodes of recordings overcoming the problem of previous approaches that required electrode selection and waveforms filtering. We apply this method to EEG data from an auditory object recognition experiment that we have previously analyzed at an ERP level. Temporally structured periods were statistically identified wherein a given topography predominated without any prior information about the temporal behavior. In addition to providing novel methods for EEG analysis, the data indicate that ERPs are reliably observable at a single-trial level when examined topographically.
{"title":"Single-trial topographic analysis of human EEG: A new `image' of event-related potentials","authors":"M. De Lucia, C. Michel, S. Clarke, M. Murray","doi":"10.1109/ITAB.2007.4407353","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407353","url":null,"abstract":"We present a novel approach for analyzing single-trial electroencephalography (EEG) data, using topographic information. The method allows for visualizing event-related potentials using all the electrodes of recordings overcoming the problem of previous approaches that required electrode selection and waveforms filtering. We apply this method to EEG data from an auditory object recognition experiment that we have previously analyzed at an ERP level. Temporally structured periods were statistically identified wherein a given topography predominated without any prior information about the temporal behavior. In addition to providing novel methods for EEG analysis, the data indicate that ERPs are reliably observable at a single-trial level when examined topographically.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"184 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":"124434095","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.2007.4407348
Wei-Ru Han, Chih-Yuan Chuang, S. Young, K. Chen, Jiun-Hung Lin
The aim of this study is to investigate erectile response to injection administration of Epimedium brevicornum Maxim (EbM) and its power spectral analysis in rats. Adult male Sprague-Dawley (SD) rats were used in this study. Under pentobarbital sodium anesthesia, the penile Intracavernous pressure (ICP) was monitored. Intracavernous administration of doses 3000 mug/0.1 mL of EbM extract was done. Continuous power spectral analysis of electrocardiogram (ECG), blood pressure (BP) signals .Frequency-domain analysis of the stationary RR interval, systolic pressure variation was performed to quantify the high-frequency power (HF), low-frequency power (LF)-to-HF ratio (LF/HF), and normalized LF (LF%) of Heart Rate Variability (HRV), Blood Pressure Variability (BPV). The results of this study suggest that intracavernous administration of EbM extract may elicit penile erection in terms of a significant increase in ICP in the rat. These results suggest that EbM extract may facilitate decrease sympathovagal balance or to reflect sympathetic modulations activities of the heart and activities penile erection function. But have no significant differences in BPV parameters.
{"title":"The effect of Epimedium brevicornum Maxim (Yin Yang Huo) extract on elicitation of penile erection, and its power spectral analysis in rats","authors":"Wei-Ru Han, Chih-Yuan Chuang, S. Young, K. Chen, Jiun-Hung Lin","doi":"10.1109/ITAB.2007.4407348","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407348","url":null,"abstract":"The aim of this study is to investigate erectile response to injection administration of Epimedium brevicornum Maxim (EbM) and its power spectral analysis in rats. Adult male Sprague-Dawley (SD) rats were used in this study. Under pentobarbital sodium anesthesia, the penile Intracavernous pressure (ICP) was monitored. Intracavernous administration of doses 3000 mug/0.1 mL of EbM extract was done. Continuous power spectral analysis of electrocardiogram (ECG), blood pressure (BP) signals .Frequency-domain analysis of the stationary RR interval, systolic pressure variation was performed to quantify the high-frequency power (HF), low-frequency power (LF)-to-HF ratio (LF/HF), and normalized LF (LF%) of Heart Rate Variability (HRV), Blood Pressure Variability (BPV). The results of this study suggest that intracavernous administration of EbM extract may elicit penile erection in terms of a significant increase in ICP in the rat. These results suggest that EbM extract may facilitate decrease sympathovagal balance or to reflect sympathetic modulations activities of the heart and activities penile erection function. But have no significant differences in BPV parameters.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"23 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":"125707385","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.2007.4407346
H. Baek, Jung Soo Kim, Y. S. Kim, Haet Bit Lee, K. Park
Coronary artery disease (CAD) is one of the major causes of death. Therefore recurrent monitoring of arterial condition is important. The photoplethysmography (PPG) is simple and cost effective technique to measure blood volume change. As an application of PPG technique, the second derivative of photoplethysmography(SDPTG) was introduced for monitoring arterial condition. SDPTG consists of an a, b, c and d wave in systole and an e wave in diastole. The SDPTG wave pattern is determined by the proportions of the b, c, d, and e waves to the a wave. In the present study, it is confirmed that the b/a ratio and SDPTG-AI increased with age, and the c/a, d/a, and e/a ratios decreased with age. The informal method which substitutes formal SDPTG-AI was suggested.
{"title":"Second Derivative of Photoplethysmography for Estimating Vascular Aging","authors":"H. Baek, Jung Soo Kim, Y. S. Kim, Haet Bit Lee, K. Park","doi":"10.1109/ITAB.2007.4407346","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407346","url":null,"abstract":"Coronary artery disease (CAD) is one of the major causes of death. Therefore recurrent monitoring of arterial condition is important. The photoplethysmography (PPG) is simple and cost effective technique to measure blood volume change. As an application of PPG technique, the second derivative of photoplethysmography(SDPTG) was introduced for monitoring arterial condition. SDPTG consists of an a, b, c and d wave in systole and an e wave in diastole. The SDPTG wave pattern is determined by the proportions of the b, c, d, and e waves to the a wave. In the present study, it is confirmed that the b/a ratio and SDPTG-AI increased with age, and the c/a, d/a, and e/a ratios decreased with age. The informal method which substitutes formal SDPTG-AI was suggested.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"37 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":"132099670","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.2007.4407384
Shing-Hong Liu, Chu-Chang Tyan, Jian-Jung Chen, Jia-Jung Wang
Previous research on the non-invasive measurement of radial pulse waveform had no standardized quantitative and qualitative procedures. The aim of this study was to propose a new non-invasive measuring apparatus that had a three-axis sphygmography and a standard positioning procedure for detecting the optimal measure site and measuring an accurate pulse waveform. The artery vessel can be viewed as a cylinder, so, during measurement, if the sensor was not placed right at the centre but at an angle, the measured waveform would be distorted. Also, the blood vessel is made of elastic material. Its compliance changes with transmural pressure. When transmural pressure is equal to zero, compliance is at its maximum. The strain gauge and pizeoresistor was used to measure the radial arterial diameter change and pulse waveform, respectively.
{"title":"A Novel Sphygmography Based on Vascular Geometry and Arterial Model","authors":"Shing-Hong Liu, Chu-Chang Tyan, Jian-Jung Chen, Jia-Jung Wang","doi":"10.1109/ITAB.2007.4407384","DOIUrl":"https://doi.org/10.1109/ITAB.2007.4407384","url":null,"abstract":"Previous research on the non-invasive measurement of radial pulse waveform had no standardized quantitative and qualitative procedures. The aim of this study was to propose a new non-invasive measuring apparatus that had a three-axis sphygmography and a standard positioning procedure for detecting the optimal measure site and measuring an accurate pulse waveform. The artery vessel can be viewed as a cylinder, so, during measurement, if the sensor was not placed right at the centre but at an angle, the measured waveform would be distorted. Also, the blood vessel is made of elastic material. Its compliance changes with transmural pressure. When transmural pressure is equal to zero, compliance is at its maximum. The strain gauge and pizeoresistor was used to measure the radial arterial diameter change and pulse waveform, respectively.","PeriodicalId":129874,"journal":{"name":"2007 6th International Special Topic Conference on Information Technology Applications in Biomedicine","volume":"350 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":"131176424","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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