Pub Date : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479852
M. Sezdi
In this study, a project was developed for performance control of the medical devices in the Cerrahpasa Health Faculty in Istanbul University. The calibration measurements of these medical devices were performed and the measurement results were interpreted in according to the IPM “Inspection and Preventive Maintenance System” procedures which are developed by ECRI (Emergency Care Research Institute). By using these results, the statistical graphics and values were obtained. In the developed project, CSS(Cascading Style Sheets), PHP(Personal Home Page), MySQL(Structured Query Language) and JavaScript languages which are implemented to the XHTML(Extensible HyperText Markup Language), were used. With this study, it was thought that the following of the medical devices in the Health Faculty could be easier. The usibility of this study's result showed how much we were right. For the future, we have the preparations to expand this study to the other departments and Çapa Health Faculty in I.U.
{"title":"Performance control of medical devices in the Cerrahpaşa Faculty of Medicine in Istanbul University","authors":"M. Sezdi","doi":"10.1109/BIYOMUT.2010.5479852","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479852","url":null,"abstract":"In this study, a project was developed for performance control of the medical devices in the Cerrahpasa Health Faculty in Istanbul University. The calibration measurements of these medical devices were performed and the measurement results were interpreted in according to the IPM “Inspection and Preventive Maintenance System” procedures which are developed by ECRI (Emergency Care Research Institute). By using these results, the statistical graphics and values were obtained. In the developed project, CSS(Cascading Style Sheets), PHP(Personal Home Page), MySQL(Structured Query Language) and JavaScript languages which are implemented to the XHTML(Extensible HyperText Markup Language), were used. With this study, it was thought that the following of the medical devices in the Health Faculty could be easier. The usibility of this study's result showed how much we were right. For the future, we have the preparations to expand this study to the other departments and Çapa Health Faculty in I.U.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129904890","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479759
Meltem Yorulmaz, E. Karahan, A. Hamamci, Cengizhan Öztürk
Retinotopy is a tool for mapping of the visual cortex which provides detailed information about the correspondence between the visual field and its cortical representation in the visual subject. Therefore, the studies about retinotopic mapping is increasing rapidly as a branch of neuro science. Our study includes three main parts: The first one is the acquiring the data. While subject is stimulated with flickering and slowly moving checkerboard, data are acquired with 3T MR machine. In the second part, analysis part, data are analyzed and visualized with Freesurfer™. Since the procedures on Freesurfer™ are complicated and depends on high technical information, in the third part, we create a MATLAB™-based GUI to make these processes simpler.
{"title":"Mapping of the visual cortex: A Freesurfer™-based approach","authors":"Meltem Yorulmaz, E. Karahan, A. Hamamci, Cengizhan Öztürk","doi":"10.1109/BIYOMUT.2010.5479759","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479759","url":null,"abstract":"Retinotopy is a tool for mapping of the visual cortex which provides detailed information about the correspondence between the visual field and its cortical representation in the visual subject. Therefore, the studies about retinotopic mapping is increasing rapidly as a branch of neuro science. Our study includes three main parts: The first one is the acquiring the data. While subject is stimulated with flickering and slowly moving checkerboard, data are acquired with 3T MR machine. In the second part, analysis part, data are analyzed and visualized with Freesurfer™. Since the procedures on Freesurfer™ are complicated and depends on high technical information, in the third part, we create a MATLAB™-based GUI to make these processes simpler.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124845442","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479758
Engin Demirel, Onur Özyurt, Ertuğrul Akbaş, A. Dinçer, Cengizhan Öztürk
For advanced magnetic resonance imaging (MRI) applications, a support and reporting system that will connect technical and clinical research centers has been designed. System consists of workstation based on the clinical center, software installed on the workstation and research center's computer and installed software. Client / server architecture and TCP-IP using the image on the MR console screen to be transmitted in real time, developed the interface and the remote control protocols, workstation with computer research data transfer between the radiologist and the engineer / physicist, the written or voice communication and analysis of the results reporting practices were all developed so that the researchers are able to intervene indirectly to the MR protocol, view the resulting data or research on their workstation, automatically analyze data and DICOM structured reports (DICOM SR) preparation opportunities were created. Analysis using as input the results of functional MRI of the anatomical atlas were superimposed over the selected images and clinicians can create reports with DICOM SR and rich text file (rtf) on software tools that have been developed.
{"title":"Remote support and reporting system for advanced applications of magnetic resonance imaging","authors":"Engin Demirel, Onur Özyurt, Ertuğrul Akbaş, A. Dinçer, Cengizhan Öztürk","doi":"10.1109/BIYOMUT.2010.5479758","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479758","url":null,"abstract":"For advanced magnetic resonance imaging (MRI) applications, a support and reporting system that will connect technical and clinical research centers has been designed. System consists of workstation based on the clinical center, software installed on the workstation and research center's computer and installed software. Client / server architecture and TCP-IP using the image on the MR console screen to be transmitted in real time, developed the interface and the remote control protocols, workstation with computer research data transfer between the radiologist and the engineer / physicist, the written or voice communication and analysis of the results reporting practices were all developed so that the researchers are able to intervene indirectly to the MR protocol, view the resulting data or research on their workstation, automatically analyze data and DICOM structured reports (DICOM SR) preparation opportunities were created. Analysis using as input the results of functional MRI of the anatomical atlas were superimposed over the selected images and clinicians can create reports with DICOM SR and rich text file (rtf) on software tools that have been developed.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128952163","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479827
U. Fidan, Naim Karasekreter, Gülin Ütebay
In this study, the signals of ECG and PCG are taken simultaneously in the clinical environment and are transferred wirelessly. With the prepared software the transferred data, which are displayed on the computer of the physician, will facilitate the comparison of the ECG and PCG formation and will also help the diagnosis of abnormalities in heart. In this system, there are two units called a transmitter and a receiver. The signals in the transmitter unit can be transferred to the computer by means of two-channel Data Acquisition Card (DAQ) in the receiver unit which digitized the signals via RF wireless transmission process and also can be displayed on the physician's computer with prepared 2-channel Data Imagining Software.
{"title":"Real time wireless monitoring of Ecg and Pcg signals at computer","authors":"U. Fidan, Naim Karasekreter, Gülin Ütebay","doi":"10.1109/BIYOMUT.2010.5479827","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479827","url":null,"abstract":"In this study, the signals of ECG and PCG are taken simultaneously in the clinical environment and are transferred wirelessly. With the prepared software the transferred data, which are displayed on the computer of the physician, will facilitate the comparison of the ECG and PCG formation and will also help the diagnosis of abnormalities in heart. In this system, there are two units called a transmitter and a receiver. The signals in the transmitter unit can be transferred to the computer by means of two-channel Data Acquisition Card (DAQ) in the receiver unit which digitized the signals via RF wireless transmission process and also can be displayed on the physician's computer with prepared 2-channel Data Imagining Software.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128248580","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479858
S. Okkesim, M. H. Asyali, S. Kara, M. Kaya
Diazepam is an active ingredient of the drugs which is used in the treatment of the anxiety, insomnia, alcohol withdrawal, and muscle spasm. It has anxiolytic, sedative, muscle relaxant and memory weakening effects. Diazepam is also administrated before surgical operations that require only local anesthesia, to prevent possible anxiety. In this study, we aimed at assessing differences in anxiety levels of patients undergoing local anesthesia. Two groups of subjects with no prior history of psychological disorders were gathered to perform a comparison. One group was administered 5 mg of diazepam and the other was not. In this way, we tried to confirm and discuss whether administering subjects who will undergo local anesthesia in their treatment with diazepam is actually beneficial or not. ECG and SaO2 signals of 16 patients who underwent coronary angiography operation at the Cardiology Center of Erciyes University (Kayseri, Turkey) were recruited. Recordings were done at three stages: one hour before, during, and one hour after the angiography test. Our preliminary results indicate that sempatovagal balance values of the group of with diazepam are greater than the other group and there are not differences in values of SaO2 between two groups.
{"title":"Effect of diazepam on the sempatovagal balance and O2 saturation","authors":"S. Okkesim, M. H. Asyali, S. Kara, M. Kaya","doi":"10.1109/BIYOMUT.2010.5479858","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479858","url":null,"abstract":"Diazepam is an active ingredient of the drugs which is used in the treatment of the anxiety, insomnia, alcohol withdrawal, and muscle spasm. It has anxiolytic, sedative, muscle relaxant and memory weakening effects. Diazepam is also administrated before surgical operations that require only local anesthesia, to prevent possible anxiety. In this study, we aimed at assessing differences in anxiety levels of patients undergoing local anesthesia. Two groups of subjects with no prior history of psychological disorders were gathered to perform a comparison. One group was administered 5 mg of diazepam and the other was not. In this way, we tried to confirm and discuss whether administering subjects who will undergo local anesthesia in their treatment with diazepam is actually beneficial or not. ECG and SaO2 signals of 16 patients who underwent coronary angiography operation at the Cardiology Center of Erciyes University (Kayseri, Turkey) were recruited. Recordings were done at three stages: one hour before, during, and one hour after the angiography test. Our preliminary results indicate that sempatovagal balance values of the group of with diazepam are greater than the other group and there are not differences in values of SaO2 between two groups.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129133366","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479785
Didar Talat, A. Guvenis
The objective of this work is to investigate the effect of both multilayer perceptron based and Gaussian maximum likelihood event positioning algorithms on the spatial resolution of a positron emission mammography (PEM) dectector, which use a continuous LSO crystal and a multianode photomultiplier tube, using Monte Carlo simulations. Moreover, the effect of crystal thickness on spatial resolution is explored. An energy threshold of 350 keV is applied to overcome Compton scatters. The aim was to achieve a high sensitivity and a low system cost using a continuous detector and increase the crystal thickness without sacrificing spatial resolution. The multilayer perceptron-based positioning algorithm is found to be less sensitive to the crystal thickness in the center of the crystal, whereas the maximum likelihood-based algorithm gives better results in the center of the first quadrant in terms of insensitivity to the crystal thickness. As a result, it has been observed that the insensitivity of algorithms to crystal thickness makes the usage of thick scintillation crystals possible for PEM designs.
{"title":"Comparison of event positioning algorithms for PEM imaging","authors":"Didar Talat, A. Guvenis","doi":"10.1109/BIYOMUT.2010.5479785","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479785","url":null,"abstract":"The objective of this work is to investigate the effect of both multilayer perceptron based and Gaussian maximum likelihood event positioning algorithms on the spatial resolution of a positron emission mammography (PEM) dectector, which use a continuous LSO crystal and a multianode photomultiplier tube, using Monte Carlo simulations. Moreover, the effect of crystal thickness on spatial resolution is explored. An energy threshold of 350 keV is applied to overcome Compton scatters. The aim was to achieve a high sensitivity and a low system cost using a continuous detector and increase the crystal thickness without sacrificing spatial resolution. The multilayer perceptron-based positioning algorithm is found to be less sensitive to the crystal thickness in the center of the crystal, whereas the maximum likelihood-based algorithm gives better results in the center of the first quadrant in terms of insensitivity to the crystal thickness. As a result, it has been observed that the insensitivity of algorithms to crystal thickness makes the usage of thick scintillation crystals possible for PEM designs.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129083743","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479787
Muge Özker, E. Karahan, Basri Erdogan, Z. Bayraktaroglu, A. Bayram, A. Ademoglu, T. Demiralp
In this study, simultaneous EEG and fMRI measurements are recorded from 18 healthy subjects during steady state visual stimulation. The stimulation frequencies that belong to the alpha, beta and gamma bands, at which the highest EEG amplitudes were observed, were determined for each subjects. The fMRI responses at those specific stimulation frequencies were anlayzed. Both EEG amplitudes and the fMRI parameters, namely the extent of the active area and the mean percentage positive BOLD change r were observed to be the highest at the alpha band and the lowest at the gamma band.
{"title":"Steady state visual evoked potential informed fMRI analysis for alpha, beta and gamma bands","authors":"Muge Özker, E. Karahan, Basri Erdogan, Z. Bayraktaroglu, A. Bayram, A. Ademoglu, T. Demiralp","doi":"10.1109/BIYOMUT.2010.5479787","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479787","url":null,"abstract":"In this study, simultaneous EEG and fMRI measurements are recorded from 18 healthy subjects during steady state visual stimulation. The stimulation frequencies that belong to the alpha, beta and gamma bands, at which the highest EEG amplitudes were observed, were determined for each subjects. The fMRI responses at those specific stimulation frequencies were anlayzed. Both EEG amplitudes and the fMRI parameters, namely the extent of the active area and the mean percentage positive BOLD change r were observed to be the highest at the alpha band and the lowest at the gamma band.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125365106","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479782
K. Akdogan, A. Yilmaz
In this study, within the frame of designing microprocessor based semi-active knee joint, a motion analysis system is designed to measure the parameters of the gait of normal and amputee subjects from imaging and direct measurements. This low cost system has been equipped for two dimensional gait analysis in the sagittal plane. Gait of an intact person is analyzed by this assembled system and its reliability has been verified by comparing with the results collected under the same circumstances by known video motion analysis system reported in the literature. The system mentioned is used to develop an ambulatory motion measuring system which can monitor the environmental conditions and user intentions is designed for an electronic above knee prosthesis to be produced. Gyroscope and accelerometer among standard sensors were selected to analyze used in prosthesis systems and ambulatory motion measurement systems due to their low cost and `easy to use' structures. Gait data collection system together with the video motion analysis was tested by considering two approaches, one with single accelerometer and the other with both sensors together. The comparison indicated that the approach using gyroscope and accelerometer showed better performance than the one using only accelerometer however keeping the complexity issue as a trade off.
{"title":"Development of motion measurement systems for electronic above knee prosthesis","authors":"K. Akdogan, A. Yilmaz","doi":"10.1109/BIYOMUT.2010.5479782","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479782","url":null,"abstract":"In this study, within the frame of designing microprocessor based semi-active knee joint, a motion analysis system is designed to measure the parameters of the gait of normal and amputee subjects from imaging and direct measurements. This low cost system has been equipped for two dimensional gait analysis in the sagittal plane. Gait of an intact person is analyzed by this assembled system and its reliability has been verified by comparing with the results collected under the same circumstances by known video motion analysis system reported in the literature. The system mentioned is used to develop an ambulatory motion measuring system which can monitor the environmental conditions and user intentions is designed for an electronic above knee prosthesis to be produced. Gyroscope and accelerometer among standard sensors were selected to analyze used in prosthesis systems and ambulatory motion measurement systems due to their low cost and `easy to use' structures. Gait data collection system together with the video motion analysis was tested by considering two approaches, one with single accelerometer and the other with both sensors together. The comparison indicated that the approach using gyroscope and accelerometer showed better performance than the one using only accelerometer however keeping the complexity issue as a trade off.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122447231","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479843
Pelin Kus, I. Karagöz
The first and one of the most important preprocessing steps of the mammogram analysis is segmentation of the breast region. Accurate detection of breast tissue-air line allows focusing on ROI in cancer investigation, by detecting architectural distortion at the border, determination of the retraction location at the cancerous region under skin and, reducing the storage needs in PACS. The structural differences of the breast tissue itself, the variations in breast position, orientation, amount of compression and device characteristics in image acquisitions taken in different times, makes breast segmentation process challenging. In this study, by proposed texture filter method, above 99% value is achieved in completeness, accuracy and quality parameters.
{"title":"Accurate segmentation of the breast region with texture filter in mammograms for CAD applications","authors":"Pelin Kus, I. Karagöz","doi":"10.1109/BIYOMUT.2010.5479843","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479843","url":null,"abstract":"The first and one of the most important preprocessing steps of the mammogram analysis is segmentation of the breast region. Accurate detection of breast tissue-air line allows focusing on ROI in cancer investigation, by detecting architectural distortion at the border, determination of the retraction location at the cancerous region under skin and, reducing the storage needs in PACS. The structural differences of the breast tissue itself, the variations in breast position, orientation, amount of compression and device characteristics in image acquisitions taken in different times, makes breast segmentation process challenging. In this study, by proposed texture filter method, above 99% value is achieved in completeness, accuracy and quality parameters.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123215986","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 : 2010-04-21DOI: 10.1109/BIYOMUT.2010.5479807
M. Alptekin, A. Akın
Human brain undergoes a number of physiological changes. Especially these changes contributes to optical properties of brain and can be observed with optical imaging methods in visible and near infrared light range. The aim of this study is, by using functional near infrared spectroscopy (fNIRS), with a specific protocol, observing oxygenation and blood volume with respect to time on young and healthy subjects. For this purpose, 5 healthy young male and 5 healthy young female are participated and measurements are taken from their prefrontal cortex during the experiment. When the subjects are in supine position, they are asked to move their heads down to their knees and stay in this position for 30 seconds. When this experiment is ended, oxygenation and blood volume changes were observed. fNIRS signals are analysed into two groups containing eight signals each and so they will represent the right and the left hemisphere of the brain. In each hemisphere, maximum and minimum points of blood volume showed no significant difference for male and female. (left hemisphere: Vmin p=0.25, Vmax p=0.12; right hemisphere: Vmin p=0.07, Vmax p=0.07). Without taking sex difference into account, Vmin ve Vmax values of right and left hemisphere are also not significantly different (respectively p=0.22, p=0.06). Therefore, this study implies that there is not a meaningful difference of brainhemodynamic responses during a head tilt test in adult subject group with respect to gender and laterality. fNIRS system hence possesses a potential to diagnose cerebrovascular diseases.
{"title":"Evaluation of brain hemodynamics with functional near infrared spectroscopy during head-down tilt on young and healthy subjects","authors":"M. Alptekin, A. Akın","doi":"10.1109/BIYOMUT.2010.5479807","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2010.5479807","url":null,"abstract":"Human brain undergoes a number of physiological changes. Especially these changes contributes to optical properties of brain and can be observed with optical imaging methods in visible and near infrared light range. The aim of this study is, by using functional near infrared spectroscopy (fNIRS), with a specific protocol, observing oxygenation and blood volume with respect to time on young and healthy subjects. For this purpose, 5 healthy young male and 5 healthy young female are participated and measurements are taken from their prefrontal cortex during the experiment. When the subjects are in supine position, they are asked to move their heads down to their knees and stay in this position for 30 seconds. When this experiment is ended, oxygenation and blood volume changes were observed. fNIRS signals are analysed into two groups containing eight signals each and so they will represent the right and the left hemisphere of the brain. In each hemisphere, maximum and minimum points of blood volume showed no significant difference for male and female. (left hemisphere: Vmin p=0.25, Vmax p=0.12; right hemisphere: Vmin p=0.07, Vmax p=0.07). Without taking sex difference into account, Vmin ve Vmax values of right and left hemisphere are also not significantly different (respectively p=0.22, p=0.06). Therefore, this study implies that there is not a meaningful difference of brainhemodynamic responses during a head tilt test in adult subject group with respect to gender and laterality. fNIRS system hence possesses a potential to diagnose cerebrovascular diseases.","PeriodicalId":180275,"journal":{"name":"2010 15th National Biomedical Engineering Meeting","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115377149","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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