Pub Date : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130288
U. Cunedioglu, Engin Baysoy, B. Yilmaz
To characterize the cardiac rhythm disturbances catheter-based cardiac mapping approaches have become a common practice due to their minimal invasiveness. A multielectrode basket-shaped contact catheter and the multielectrode intravenous catheter are two types of the used catheters. Catheter based approaches provide mapping of the one surface at a time. Therefore, there is a need for a method that can achieve mapping of the inner (endocard) and outer (epicard) surfaces of the heart in one heart beat. In this study, for simultaneous mapping of epi/endocardial surfaces multielectrode basket-shaped catheters and intravenous catheters we used statistical estimation method. In order to test this approach we used three dimensional simulations of the electrical activity of the heart. For this purpose, we created a simulation database using Aliev-Panfilov model. Our simulation database included 3880 maps formed by starting the simulations from endocardial, myocardial and epicardial sites. Half of these maps were used as training data and the rest were used as test data. We selected 64 points on left and 64 on right endocardial surfaces as multielectrode basket catheter measurement sites and 91 sites on epicardial surface as the intravenous catheter measurement sites. To test the performance of this approach we used criteria such as correlation coefficient (CC), root mean squared error (RMSE), relative error (RE) and localization error (LE). As a result, between the estimated and original maps CC is ∼0,98, RMSE is ∼2,7 ms, RE is ∼0,05 and LE is 5–6 mm.
{"title":"Usage of statistical estimation method for the simultaneous mapping of inner and outer surfaces of the heart","authors":"U. Cunedioglu, Engin Baysoy, B. Yilmaz","doi":"10.1109/BIYOMUT.2009.5130288","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130288","url":null,"abstract":"To characterize the cardiac rhythm disturbances catheter-based cardiac mapping approaches have become a common practice due to their minimal invasiveness. A multielectrode basket-shaped contact catheter and the multielectrode intravenous catheter are two types of the used catheters. Catheter based approaches provide mapping of the one surface at a time. Therefore, there is a need for a method that can achieve mapping of the inner (endocard) and outer (epicard) surfaces of the heart in one heart beat. In this study, for simultaneous mapping of epi/endocardial surfaces multielectrode basket-shaped catheters and intravenous catheters we used statistical estimation method. In order to test this approach we used three dimensional simulations of the electrical activity of the heart. For this purpose, we created a simulation database using Aliev-Panfilov model. Our simulation database included 3880 maps formed by starting the simulations from endocardial, myocardial and epicardial sites. Half of these maps were used as training data and the rest were used as test data. We selected 64 points on left and 64 on right endocardial surfaces as multielectrode basket catheter measurement sites and 91 sites on epicardial surface as the intravenous catheter measurement sites. To test the performance of this approach we used criteria such as correlation coefficient (CC), root mean squared error (RMSE), relative error (RE) and localization error (LE). As a result, between the estimated and original maps CC is ∼0,98, RMSE is ∼2,7 ms, RE is ∼0,05 and LE is 5–6 mm.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126346652","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130258
U. Halici
In this study the classification of the EEG Signals recorded during Motor Imagery for curser movement in Brain Computer Interfaces is examined, in which the feature vectors obtained in frequency domain is used and then the linear transformations are applied for reducing the size of the feature vectors.
{"title":"Classification in frequency domain of EEG Signals of Motor Imagery for Brain Computer Interfaces","authors":"U. Halici","doi":"10.1109/BIYOMUT.2009.5130258","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130258","url":null,"abstract":"In this study the classification of the EEG Signals recorded during Motor Imagery for curser movement in Brain Computer Interfaces is examined, in which the feature vectors obtained in frequency domain is used and then the linear transformations are applied for reducing the size of the feature vectors.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126414107","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130324
Berivan Çeçen, leyla didem kozaci, M. Yuksel, A. Pasinli, Ozge Oral, H. Havitcioglu
The main purpose of this study is to investigate the increase in osteoblast cells cultured on three different porosity scaffolds in vivo environment. Hence, Collagen + Poly-l-lactic acid (PLLA), Collagen +HA (30 C°), Collagen + HA (37 C°) were studied. During the operation, 20 ml bone marrow was taken for any of patient in sterile conditions. Mesenchymal stem cells were differentiated to osteoblast cells. After the ALP and morphological evaluations were assessed, osteoblast cells were planted on 3 different scaffolds and SEM observations were evaluated. At twenty-fifth day, konfleunt osteoblast cells were observed. Osteoblast cells were watched on Collagen + HA (30 C°) scaffold appropriately. According to our knowledge, in various bone defects, cell cultures on suitable scaffolds are contribute to clinical studies.
{"title":"To compare the different scaffolds according to porosity's properties","authors":"Berivan Çeçen, leyla didem kozaci, M. Yuksel, A. Pasinli, Ozge Oral, H. Havitcioglu","doi":"10.1109/BIYOMUT.2009.5130324","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130324","url":null,"abstract":"The main purpose of this study is to investigate the increase in osteoblast cells cultured on three different porosity scaffolds in vivo environment. Hence, Collagen + Poly-l-lactic acid (PLLA), Collagen +HA (30 C°), Collagen + HA (37 C°) were studied. During the operation, 20 ml bone marrow was taken for any of patient in sterile conditions. Mesenchymal stem cells were differentiated to osteoblast cells. After the ALP and morphological evaluations were assessed, osteoblast cells were planted on 3 different scaffolds and SEM observations were evaluated. At twenty-fifth day, konfleunt osteoblast cells were observed. Osteoblast cells were watched on Collagen + HA (30 C°) scaffold appropriately. According to our knowledge, in various bone defects, cell cultures on suitable scaffolds are contribute to clinical studies.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471870","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130269
F. A. Durmaz, A. C. Yilmam, C. Ozturk
As we know during interventional studies X-Ray Angiography provides us a high resolution and refresh rate, but as a trade off it doesn't have soft tissue contrast. MR imaging provides us 3-D anatomic imaging, and soft tissue contrast. Our aim is to fuse 2-D X-ray images with 3-D MR volume (XFM). We are using an intensity based algorithm to find mutual information between two modalities.
{"title":"MR and X-Ray Angiography registration intensity based approach","authors":"F. A. Durmaz, A. C. Yilmam, C. Ozturk","doi":"10.1109/BIYOMUT.2009.5130269","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130269","url":null,"abstract":"As we know during interventional studies X-Ray Angiography provides us a high resolution and refresh rate, but as a trade off it doesn't have soft tissue contrast. MR imaging provides us 3-D anatomic imaging, and soft tissue contrast. Our aim is to fuse 2-D X-ray images with 3-D MR volume (XFM). We are using an intensity based algorithm to find mutual information between two modalities.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116800304","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130312
A. Şişman, M. Karaman
We investigated a side-looking catheter structure employing rotating annular array with 8 concentric annuli.. This structure allows dynamic focusing with a simple front-end electronic. We tested the image quality of proposed structure using simulations and compared with the existing structures.
{"title":"Analysis of catheter-based imaging devices for side-looking IVUS","authors":"A. Şişman, M. Karaman","doi":"10.1109/BIYOMUT.2009.5130312","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130312","url":null,"abstract":"We investigated a side-looking catheter structure employing rotating annular array with 8 concentric annuli.. This structure allows dynamic focusing with a simple front-end electronic. We tested the image quality of proposed structure using simulations and compared with the existing structures.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758363","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130263
Hakan Gemici, I. Karagoz, M. Ozden
In this study it is aimed to design and develop an instrumental device which is capable of measuring some key parameters of X-ray tubes employed in many medical imaging devices including conventional X-ray imaging, fluoroscopy, mammography and dental X-ray imaging and those measured parameters which is critical for both imaging quality and patient safety aspects are acquired and evaluated extremely precise and very reliable with the help of latest technological advancements. Furthermore the designed instrumental device is supplemented with a Bluetooth connection capability which allows both remote controlling of the device and data transmission between the device and PC. Also a graphical user interface which is capable of recording multiple exposure data acquired via Bluetooth module and plotting comparison graphs in demand of user is also programmed in .NET environment. Remote controlling of the device and data transmission via Bluetooth avoided possible risks of working close to high voltage transformer of X-ray tube, hence gives an extra protection to medical device technicians. Taken measurements can be used to make periodic calibrations of medical imaging devices and this also helps reducing possible risks may be caused by overdosing during imaging.
{"title":"Precision calibrator design and implementation for X-ray diagnostic devices","authors":"Hakan Gemici, I. Karagoz, M. Ozden","doi":"10.1109/BIYOMUT.2009.5130263","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130263","url":null,"abstract":"In this study it is aimed to design and develop an instrumental device which is capable of measuring some key parameters of X-ray tubes employed in many medical imaging devices including conventional X-ray imaging, fluoroscopy, mammography and dental X-ray imaging and those measured parameters which is critical for both imaging quality and patient safety aspects are acquired and evaluated extremely precise and very reliable with the help of latest technological advancements. Furthermore the designed instrumental device is supplemented with a Bluetooth connection capability which allows both remote controlling of the device and data transmission between the device and PC. Also a graphical user interface which is capable of recording multiple exposure data acquired via Bluetooth module and plotting comparison graphs in demand of user is also programmed in .NET environment. Remote controlling of the device and data transmission via Bluetooth avoided possible risks of working close to high voltage transformer of X-ray tube, hence gives an extra protection to medical device technicians. Taken measurements can be used to make periodic calibrations of medical imaging devices and this also helps reducing possible risks may be caused by overdosing during imaging.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126756827","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130384
Gokcen Yildiz
Animal studies have shown that chronic stress and depression produce irreversible atrophy of the apical dendrites of CA3 pyramidal neurons. Dysregulations caused by depression also disturbes molecular mechanisms of hippocampal long-term potentiation (LTP). The effect of stress on amygdala is just the opposite of the hippocampus; neuroimaging studies have found both increased baseline activity and a greater amygdala volume in depressed compared to nondepressed individuals. In our study, we have implemented a computational model of CA3 region of the hippocampus to simulate the auto-associative memory impairement caused by depression. In our model, the dendritic atrophy and disturbed synaptic plasticity, is represented by the increase in transmission delay and the increased amygdala activity, in turn, is represented by increased inhibitory input to CA3 region. Our auto-associative CA3 network incorporates 256 excitatory recurrent Hebb's synapses in a 16 × 16 array plus one interneuron representing the inhibition by amygdala. The network has been trained to recognize face patterns. We tested the auto-associative memory function with incomplete patterns and we expected our model to perform the pattern completion function. The pattern completion performance was negatively effected by the increase of the inhibition by amygdala. The increase in information delay due to dendritical atrophy had even more severe consequences on the memory performance. We observed a shutting off of the auto-associative memory for time delays longer than 10ms. In further studies, our dynamic model will be improved to include the molecular effects of stress on synaptic plasticity.
{"title":"Effects of depression on hippocampal memory: A computational model","authors":"Gokcen Yildiz","doi":"10.1109/BIYOMUT.2009.5130384","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130384","url":null,"abstract":"Animal studies have shown that chronic stress and depression produce irreversible atrophy of the apical dendrites of CA3 pyramidal neurons. Dysregulations caused by depression also disturbes molecular mechanisms of hippocampal long-term potentiation (LTP). The effect of stress on amygdala is just the opposite of the hippocampus; neuroimaging studies have found both increased baseline activity and a greater amygdala volume in depressed compared to nondepressed individuals. In our study, we have implemented a computational model of CA3 region of the hippocampus to simulate the auto-associative memory impairement caused by depression. In our model, the dendritic atrophy and disturbed synaptic plasticity, is represented by the increase in transmission delay and the increased amygdala activity, in turn, is represented by increased inhibitory input to CA3 region. Our auto-associative CA3 network incorporates 256 excitatory recurrent Hebb's synapses in a 16 × 16 array plus one interneuron representing the inhibition by amygdala. The network has been trained to recognize face patterns. We tested the auto-associative memory function with incomplete patterns and we expected our model to perform the pattern completion function. The pattern completion performance was negatively effected by the increase of the inhibition by amygdala. The increase in information delay due to dendritical atrophy had even more severe consequences on the memory performance. We observed a shutting off of the auto-associative memory for time delays longer than 10ms. In further studies, our dynamic model will be improved to include the molecular effects of stress on synaptic plasticity.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127916694","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130385
Tugba Ozdemir, C. Dong
One of the predominant cause of cancer patient death is the metastatic spread of tumor cells. The leading step in melanoma extravasation is the tumor cell adhesion to the endothelium of the capillaries. However, melanoma cells do not express the appropriate adhesion molecules to bind to an activated endothelium. Previous studies have found neutrophils facilitate melanoma cell adhesion under dynamic flow conditions throught the binding of ICAM-1 on melanoma cells and β2 integrins on PMNs. In addition, soluble fibrin (sFn) is a marker for propagated intravascular coagulation and have a dramatical increase in cancer patients' laboratory coagulation inspections . Soluble fibrin molecule has both receptors for Mac-1 on PMNs and ICAM-1 on tumor cell surface which may affect the tumor cell adherence to endothelial wall surface via PMN. The objective of this study is to investigate the role of soluble fibrin on PMN facilitated tumor cell adherence to endothelial wall and how different effects of hydrodynamic shear stress and shear rate affects the force of adhesion to vessel wall.
{"title":"The role of fibrin as a ligand for ICAM-1 and PMN in melanoma adhesion under different shear conditions.","authors":"Tugba Ozdemir, C. Dong","doi":"10.1109/BIYOMUT.2009.5130385","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130385","url":null,"abstract":"One of the predominant cause of cancer patient death is the metastatic spread of tumor cells. The leading step in melanoma extravasation is the tumor cell adhesion to the endothelium of the capillaries. However, melanoma cells do not express the appropriate adhesion molecules to bind to an activated endothelium. Previous studies have found neutrophils facilitate melanoma cell adhesion under dynamic flow conditions throught the binding of ICAM-1 on melanoma cells and β2 integrins on PMNs. In addition, soluble fibrin (sFn) is a marker for propagated intravascular coagulation and have a dramatical increase in cancer patients' laboratory coagulation inspections . Soluble fibrin molecule has both receptors for Mac-1 on PMNs and ICAM-1 on tumor cell surface which may affect the tumor cell adherence to endothelial wall surface via PMN. The objective of this study is to investigate the role of soluble fibrin on PMN facilitated tumor cell adherence to endothelial wall and how different effects of hydrodynamic shear stress and shear rate affects the force of adhesion to vessel wall.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127989816","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130291
R. Boyacioglu, B. M. Eyuboglu
Magnetic Resonance Electrical Impedance Tomography is an imaging modality which reconstructs true conductivity images by using current density distribution and surface potential measurements. In this study, two current based algorithms, namely equipotential projection [1] and J-substitution image reconstruction [2] algorithms are compared. A novel reconstruction technique, J-substitution and equipotential-projection based hybrid reconstruction algorithm, is proposed. In this technique, the image which is reconstructed with equipotential projection algorithm is assigned as the starting conductivity distribution for J-substitution algorithm. Moreover, true conductivity values can be reconstructed with two surface potential measurements. Simulation results on a thorax phantom show that the proposed method has a better performance in some regions.
{"title":"J-substitution and equipotential-projection based hybrid MREIT reconstruction algorithm","authors":"R. Boyacioglu, B. M. Eyuboglu","doi":"10.1109/BIYOMUT.2009.5130291","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130291","url":null,"abstract":"Magnetic Resonance Electrical Impedance Tomography is an imaging modality which reconstructs true conductivity images by using current density distribution and surface potential measurements. In this study, two current based algorithms, namely equipotential projection [1] and J-substitution image reconstruction [2] algorithms are compared. A novel reconstruction technique, J-substitution and equipotential-projection based hybrid reconstruction algorithm, is proposed. In this technique, the image which is reconstructed with equipotential projection algorithm is assigned as the starting conductivity distribution for J-substitution algorithm. Moreover, true conductivity values can be reconstructed with two surface potential measurements. Simulation results on a thorax phantom show that the proposed method has a better performance in some regions.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131363288","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 : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130280
G. E. Guraksin, U. Ergun, Omer Deperlioglu
The heart is one of the two significant organs for human life. Today the most important method used by the medical doctors in diagnosing the disorders in connection with the heart is listening with the stethoscope. The sounds created by the flow of the blood entering the heart and movements of the valvular connected to the flow are listened and then the anormalities related to the heart are determined. On the other hand, the method of listening with the stethoscope has many constrains. In this study, from the heart sounds taken from the patient via electronic stethoscope digital data have been acquired, and with the discrete Fourier transform, which is one of the signal processing methods, frequency analysis has been performed, and both sound graphic and frequency spectrum have been displayed on the pocket computer. Thus, examining the frequency spectrum of the normal and anormal heart sounds, it is thought that the differences on the frequency axis of the normal and anormal sounds may be beneficial in diagnosing. Because unlike normal heart sounds, the diseased heart sounds taken from a patient who has any kind of heart disorder include higher frequency components. As the developed system can be operated in a mobile way, it is appropriate for the medical doctors to use it in clinical practically.
{"title":"Performing discrete fourier transform of the heart sounds on the pocket computer","authors":"G. E. Guraksin, U. Ergun, Omer Deperlioglu","doi":"10.1109/BIYOMUT.2009.5130280","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130280","url":null,"abstract":"The heart is one of the two significant organs for human life. Today the most important method used by the medical doctors in diagnosing the disorders in connection with the heart is listening with the stethoscope. The sounds created by the flow of the blood entering the heart and movements of the valvular connected to the flow are listened and then the anormalities related to the heart are determined. On the other hand, the method of listening with the stethoscope has many constrains. In this study, from the heart sounds taken from the patient via electronic stethoscope digital data have been acquired, and with the discrete Fourier transform, which is one of the signal processing methods, frequency analysis has been performed, and both sound graphic and frequency spectrum have been displayed on the pocket computer. Thus, examining the frequency spectrum of the normal and anormal heart sounds, it is thought that the differences on the frequency axis of the normal and anormal sounds may be beneficial in diagnosing. Because unlike normal heart sounds, the diseased heart sounds taken from a patient who has any kind of heart disorder include higher frequency components. As the developed system can be operated in a mobile way, it is appropriate for the medical doctors to use it in clinical practically.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132151386","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：