Pub Date : 2009-05-20DOI: 10.1109/BIYOMUT.2009.5130363
M. Yıldız, D. Yilmaz
In this study, 27 young and healthy subjects was listening to the classical and Turkish music samples which are believed to changeable the subject's emotional state. Their effects on Autonomic Nervous System (ANS) are investigated by using the heart rate variability (HRV) analysis which is accepted as a non-invasive indicator of ANS. The electrocardiogram (ECG) and respiration records were made before and during the listening music samples. Heart rate variability (HRV) signals are obtained form records and power spectral densities (PSD) of HRV are estimated. According to the results of calculated parameters, during the listening to classical music samples some statistically significant changes were occurred in sympathetic and parasympathetic activities of ANS. Turkish music samples were not causes significant differences on the ANS related HRV parameters.
{"title":"The effects of classical and turkish music samples on the Autonomic Nervous System","authors":"M. Yıldız, D. Yilmaz","doi":"10.1109/BIYOMUT.2009.5130363","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130363","url":null,"abstract":"In this study, 27 young and healthy subjects was listening to the classical and Turkish music samples which are believed to changeable the subject's emotional state. Their effects on Autonomic Nervous System (ANS) are investigated by using the heart rate variability (HRV) analysis which is accepted as a non-invasive indicator of ANS. The electrocardiogram (ECG) and respiration records were made before and during the listening music samples. Heart rate variability (HRV) signals are obtained form records and power spectral densities (PSD) of HRV are estimated. According to the results of calculated parameters, during the listening to classical music samples some statistically significant changes were occurred in sympathetic and parasympathetic activities of ANS. Turkish music samples were not causes significant differences on the ANS related HRV parameters.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"67 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":"114240734","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.2009.5130326
F. Ak Azem, A. Cakir
In recent years, synthetic hydroxyapatite (HAP) has attracted much interest because of the quest for new generation implants able to promote rapid osteointegration and having longer lifetimes. HAP a major inorganic component of bone, has been increasingly used as a bioceramic coating for load-bearing implants to improve fixation to natural bone tissue. In this study, HAP coating was synthesized using a sol-gel processing on 316L stainless steel substrate and heat treated at different calcination temperatures. The formation of HAP and other compounds were identified and characterized using X-ray diffraction spectroscopy (XRD), Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). It was found that crystallinity, structure and morphology of the coatings varied depending on calcination temperature of the layer. The surface morphology of the HAP coating calcined at 500°C displayed porous and crack free structure.
{"title":"Production of HAP coating on 316L stainless steel substrates by sol-gel technique","authors":"F. Ak Azem, A. Cakir","doi":"10.1109/BIYOMUT.2009.5130326","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130326","url":null,"abstract":"In recent years, synthetic hydroxyapatite (HAP) has attracted much interest because of the quest for new generation implants able to promote rapid osteointegration and having longer lifetimes. HAP a major inorganic component of bone, has been increasingly used as a bioceramic coating for load-bearing implants to improve fixation to natural bone tissue. In this study, HAP coating was synthesized using a sol-gel processing on 316L stainless steel substrate and heat treated at different calcination temperatures. The formation of HAP and other compounds were identified and characterized using X-ray diffraction spectroscopy (XRD), Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). It was found that crystallinity, structure and morphology of the coatings varied depending on calcination temperature of the layer. The surface morphology of the HAP coating calcined at 500°C displayed porous and crack free structure.","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":"123856505","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.2009.5130294
Feza Carlak, N. G. Gencer
Different tissues energy consuming values show differences from each other. Conductivity and metabolic heat source of the tissue alter whether it is healthy or not. The temperature differences of tissues take the thermal infrared imaging into very important and vital point. It was not possible to be able to detect these amounts of differences with the early instrumentation and technology. However, in recent years by the improvement of sensitivity of detectors and cameras it is now possible to sense these amounts of temperature differences. Infrared imaging has a limited performance for the breast cancer diagnosis which occurs especially due to patient moving. Nevertheless, this performance can be improved by applying low frequency currents in medical safety limits. By the help of current application, temperature differences of tissues which have different electrical and thermal properties can be increased and malignant tissue can be distinguished in the obtained thermal image. In this study, woman breast and cancerous tissue are two dimensionally modeled. By using realistic values for regular and cancerous tissue Pennes bio heat equation is solved with finite element method. Simulations are implemented for different tumor locations. Whenever malignant tissue approaches to the skin surface, higher temperature differences are obtained. Imaging performance is increased with current application and tumors can be sensed at 4.5 cm depth with the modern state-of-the-art thermal infrared imagers (possess approximately 10 °mK sensitivity).
{"title":"Electrically stimulated breast model's thermal imaging simulations","authors":"Feza Carlak, N. G. Gencer","doi":"10.1109/BIYOMUT.2009.5130294","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130294","url":null,"abstract":"Different tissues energy consuming values show differences from each other. Conductivity and metabolic heat source of the tissue alter whether it is healthy or not. The temperature differences of tissues take the thermal infrared imaging into very important and vital point. It was not possible to be able to detect these amounts of differences with the early instrumentation and technology. However, in recent years by the improvement of sensitivity of detectors and cameras it is now possible to sense these amounts of temperature differences. Infrared imaging has a limited performance for the breast cancer diagnosis which occurs especially due to patient moving. Nevertheless, this performance can be improved by applying low frequency currents in medical safety limits. By the help of current application, temperature differences of tissues which have different electrical and thermal properties can be increased and malignant tissue can be distinguished in the obtained thermal image. In this study, woman breast and cancerous tissue are two dimensionally modeled. By using realistic values for regular and cancerous tissue Pennes bio heat equation is solved with finite element method. Simulations are implemented for different tumor locations. Whenever malignant tissue approaches to the skin surface, higher temperature differences are obtained. Imaging performance is increased with current application and tumors can be sensed at 4.5 cm depth with the modern state-of-the-art thermal infrared imagers (possess approximately 10 °mK sensitivity).","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"20 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":"123867796","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.2009.5130376
Duygu Torun, M. Yıldız, Burak Guclu
The sensory response upon vibrotactile stimuli is still not entirely understood. Previously, the responses of single units from mechanoreceptive afferents and cortical neurons have been studied. There is a thorough psychophysical literature on judgements of the presence, magnitude, and frequency of vibrotactile stimuli [1–3]. However, non-invasive recording of evoked responses on the scalp have solely been determined for electrical stimuli.In this study, psychophysical detection thresholds of adult subjects were measured at various mechanical frequencies. These values were found to be consistent with the literature. To measure the frequency following brain responses, stimulus intensities were determined based on psychophysical sensation levels. Data recorded from the somatosensory cortex area via electrodes placed on scalp, were analysed with wavelet transform. The results show that, as the mechanical stimulus intensity was increased, the background activity was suppressed and the frequency-following activity during stimulus period increased. This finding was statistically significant
{"title":"Frequency following brain oscillations evoked by vibrotactile stimulation of the distal phalanx in normal subjects","authors":"Duygu Torun, M. Yıldız, Burak Guclu","doi":"10.1109/BIYOMUT.2009.5130376","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130376","url":null,"abstract":"The sensory response upon vibrotactile stimuli is still not entirely understood. Previously, the responses of single units from mechanoreceptive afferents and cortical neurons have been studied. There is a thorough psychophysical literature on judgements of the presence, magnitude, and frequency of vibrotactile stimuli [1–3]. However, non-invasive recording of evoked responses on the scalp have solely been determined for electrical stimuli.In this study, psychophysical detection thresholds of adult subjects were measured at various mechanical frequencies. These values were found to be consistent with the literature. To measure the frequency following brain responses, stimulus intensities were determined based on psychophysical sensation levels. Data recorded from the somatosensory cortex area via electrodes placed on scalp, were analysed with wavelet transform. The results show that, as the mechanical stimulus intensity was increased, the background activity was suppressed and the frequency-following activity during stimulus period increased. This finding was statistically significant","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"650 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":"123288376","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.2009.5130305
Nimet Yildirim, Dilek Odaci, Gulsiye Ozturk, S. Alp, Y. Ergun, K. Feller, K. Dornbusch, S. Timur
Here we present a new sol-gel based fluorescent glukoz biosensor. The sensor is based on the pH sensitive fluorescent dye entrapped in a tetraethoxysilane (TEOS) based sol-gel together with glukoz oxidase. Micro-analytic sustem which can measure the pH induced chance in the fluorescens intensity due to the enzymatic reaction in spotted layer on the glass surface was used as a measuring system. The system was calibrated to glukoz. As well as characterization, glukoz biosensing in such fruit juice samples were carried out.
{"title":"Design and application of a sol-gel based fluorescent glucose arrays","authors":"Nimet Yildirim, Dilek Odaci, Gulsiye Ozturk, S. Alp, Y. Ergun, K. Feller, K. Dornbusch, S. Timur","doi":"10.1109/BIYOMUT.2009.5130305","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130305","url":null,"abstract":"Here we present a new sol-gel based fluorescent glukoz biosensor. The sensor is based on the pH sensitive fluorescent dye entrapped in a tetraethoxysilane (TEOS) based sol-gel together with glukoz oxidase. Micro-analytic sustem which can measure the pH induced chance in the fluorescens intensity due to the enzymatic reaction in spotted layer on the glass surface was used as a measuring system. The system was calibrated to glukoz. As well as characterization, glukoz biosensing in such fruit juice samples were carried out.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"42 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":"123577218","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.2009.5130329
Ugras Erdogan, A. Ozkurt, M. Ozgoren, C. Guzelis, Y. Abacioğlu, O. Dicle
Three dimensional modeling and simulation software are becoming more widespread in many fields with the emphasis on engineering, military and medical applications. The main important features of these applications are fast prototyping, simulation of scientific and engineering problems under different conditions and interactive user interface. Therefore, an opportunity for a fast visual education course and understanding the physical and mathematical reasons lying under the problems is presented to engineers, military and scientific researches in the respective fields. The main requirements of these applications are high performance computer systems and user interfaces that feature an easier interaction. The fast developing computer architecture maintains the necessary architecture and enables the applications to improve. Considering above and the expectations of Dokuz Eylül University Faculty of Medicine, the development of a virtual environment software that will model the predefined medical processes with user interaction has been aimed. In this paper, the 1. section is reserved for basic concepts and field applications. The hardware and software infrastructure and algorithm development process we used are presented in the 2. section. The 3. section presents the completed stages and first results of our application. The final section which is the 4. section is reserved for the conclusion and future work.
{"title":"Interactive education system for medicine and engineering using three dimensional virtual environments","authors":"Ugras Erdogan, A. Ozkurt, M. Ozgoren, C. Guzelis, Y. Abacioğlu, O. Dicle","doi":"10.1109/BIYOMUT.2009.5130329","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130329","url":null,"abstract":"Three dimensional modeling and simulation software are becoming more widespread in many fields with the emphasis on engineering, military and medical applications. The main important features of these applications are fast prototyping, simulation of scientific and engineering problems under different conditions and interactive user interface. Therefore, an opportunity for a fast visual education course and understanding the physical and mathematical reasons lying under the problems is presented to engineers, military and scientific researches in the respective fields. The main requirements of these applications are high performance computer systems and user interfaces that feature an easier interaction. The fast developing computer architecture maintains the necessary architecture and enables the applications to improve. Considering above and the expectations of Dokuz Eylül University Faculty of Medicine, the development of a virtual environment software that will model the predefined medical processes with user interaction has been aimed. In this paper, the 1. section is reserved for basic concepts and field applications. The hardware and software infrastructure and algorithm development process we used are presented in the 2. section. The 3. section presents the completed stages and first results of our application. The final section which is the 4. section is reserved for the conclusion and future work.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"26 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":"122628164","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.2009.5130265
Erhan Ocak, H. A. Yucer, I. Kocum, Dilek Cokeliler
Radio frequency glow discharge system is used for processing the fourth state of matter as called plasma in laboratory condition. Plasma state at room temperature is novel technique for biomedical applications especially in modification of sensor and different type of biomaterial surfaces to have proper functionality (improvement of hidrophilicity, hydrophobicity, tissue compability, blood compability etc.). In this study designs the parts of RF plasma system, RF generator, impedance matching and power source which will drive the 150 watt RF power amplifier are presented. This power which is produce by system, is applied on reference surface with the aid of electrodes. In this scope the power, which is get high frequency, is used for generating plasma at allowable value of inert gases and monomers on low pressure (10−3 Torr) and reference biomaterial surface will be modified homogeneously by this plasma generation.
{"title":"Design and implementation of radio frequency glow discharge system","authors":"Erhan Ocak, H. A. Yucer, I. Kocum, Dilek Cokeliler","doi":"10.1109/BIYOMUT.2009.5130265","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130265","url":null,"abstract":"Radio frequency glow discharge system is used for processing the fourth state of matter as called plasma in laboratory condition. Plasma state at room temperature is novel technique for biomedical applications especially in modification of sensor and different type of biomaterial surfaces to have proper functionality (improvement of hidrophilicity, hydrophobicity, tissue compability, blood compability etc.). In this study designs the parts of RF plasma system, RF generator, impedance matching and power source which will drive the 150 watt RF power amplifier are presented. This power which is produce by system, is applied on reference surface with the aid of electrodes. In this scope the power, which is get high frequency, is used for generating plasma at allowable value of inert gases and monomers on low pressure (10−3 Torr) and reference biomaterial surface will be modified homogeneously by this plasma generation.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"93 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":"122696538","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.2009.5130303
B. H. Aksebzeci, S. Kara, M. H. Asyali, Yasemin Kahraman, O. Er, E. Kaya, H. Ozbilge
Identification of microorganisms causing root canal infections is an important step in the treatment of these infections. Cultivating the microorganism involved is a relatively difficult and time consuming process. Therefore, clinicians prefer to follow a treatment method based on their prior experience, rather than identifying the related pathogen microorganism and choosing a treatment strategy accordingly. In this study, we have acquired odor data using an electronic-nose equipment with 32 carbon polymer sensors, from pure cultures of 7 microorganisms which are typical causes of root canals infections. We have worked on 28 specimens that are prepared at the Microbiology Laboratory of Pharmacy Faculty. Therefore, there were 4 odor data samples for each of the 7 microorganism types. We have then processed odor data using different pre-processing and dimensions reduction methods and obtained 18 different datasets. We have finally classified these datasets into 7 groups using Discriminant Analysis (DA) and investigated performance of several subtypes of DA algorithm, namely linear, Mahalanobis and quadratic. We have observed that the quadratic approach produces relatively better classification performance. Besides, we have figured out the impact of different pre-processing methods on the classification accuracy.
{"title":"Classification of microorganism species using Discriminant Analysis","authors":"B. H. Aksebzeci, S. Kara, M. H. Asyali, Yasemin Kahraman, O. Er, E. Kaya, H. Ozbilge","doi":"10.1109/BIYOMUT.2009.5130303","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130303","url":null,"abstract":"Identification of microorganisms causing root canal infections is an important step in the treatment of these infections. Cultivating the microorganism involved is a relatively difficult and time consuming process. Therefore, clinicians prefer to follow a treatment method based on their prior experience, rather than identifying the related pathogen microorganism and choosing a treatment strategy accordingly. In this study, we have acquired odor data using an electronic-nose equipment with 32 carbon polymer sensors, from pure cultures of 7 microorganisms which are typical causes of root canals infections. We have worked on 28 specimens that are prepared at the Microbiology Laboratory of Pharmacy Faculty. Therefore, there were 4 odor data samples for each of the 7 microorganism types. We have then processed odor data using different pre-processing and dimensions reduction methods and obtained 18 different datasets. We have finally classified these datasets into 7 groups using Discriminant Analysis (DA) and investigated performance of several subtypes of DA algorithm, namely linear, Mahalanobis and quadratic. We have observed that the quadratic approach produces relatively better classification performance. Besides, we have figured out the impact of different pre-processing methods on the classification accuracy.","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":"129561820","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.2009.5130364
H. Hasan, Cecen B. Berivan, B. Lutfu, Erduran D. Mehmet, Karakasli E. Ahmet
In this study, the biomechanical properties of meniscus under pull-out and compression forces are investigated.
在本研究中，研究了半月板在拉出力和压缩力作用下的生物力学特性。
{"title":"The biomechanİcal properties of meniscus","authors":"H. Hasan, Cecen B. Berivan, B. Lutfu, Erduran D. Mehmet, Karakasli E. Ahmet","doi":"10.1109/BIYOMUT.2009.5130364","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130364","url":null,"abstract":"In this study, the biomechanical properties of meniscus under pull-out and compression forces are investigated.","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":"129607905","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.2009.5130284
E. Çiftçi, B. Yilmaz
Lithotripsy systems are commonly used to break kidney stones into fragments. Nowadays these systems are also used in orthopedic operations. There are several ongoing investigational studies on lithotripsy systems in the treatment of cancer and cardiovascular diseases. Because of these new application areas we need novel lithotripter designs for different kinds of treatment strategies. The best way to reduce design time and cost is to create a computational model of the lithotripsy system. In this study the finite difference time domain (FDTD) method were used while constructing the computational model of the lithotripsy system. While implementing the model, most of the physical system parameters were defined as an input and/or as a variable in the simulations. We tested several realistic parameters used in the simulations and compared the results with the expected outcomes and optimized our system accordingly. Finally, we studied the effects of changing the input parameters like ellipsoide reflector size, and focus point misalignment. In conclusion, to reduce design costs in various medical applications that use shockwave principle this computer-based simulation platform may be suitable.
{"title":"Shockwave simulation in electrohydrolic lithotripsy and wave performance optimization","authors":"E. Çiftçi, B. Yilmaz","doi":"10.1109/BIYOMUT.2009.5130284","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2009.5130284","url":null,"abstract":"Lithotripsy systems are commonly used to break kidney stones into fragments. Nowadays these systems are also used in orthopedic operations. There are several ongoing investigational studies on lithotripsy systems in the treatment of cancer and cardiovascular diseases. Because of these new application areas we need novel lithotripter designs for different kinds of treatment strategies. The best way to reduce design time and cost is to create a computational model of the lithotripsy system. In this study the finite difference time domain (FDTD) method were used while constructing the computational model of the lithotripsy system. While implementing the model, most of the physical system parameters were defined as an input and/or as a variable in the simulations. We tested several realistic parameters used in the simulations and compared the results with the expected outcomes and optimized our system accordingly. Finally, we studied the effects of changing the input parameters like ellipsoide reflector size, and focus point misalignment. In conclusion, to reduce design costs in various medical applications that use shockwave principle this computer-based simulation platform may be suitable.","PeriodicalId":119026,"journal":{"name":"2009 14th National Biomedical Engineering Meeting","volume":"81 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":"126367772","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：