2014 18th National Biomedical Engineering Meeting最新文献

{"title":"Numerical studies for Hall Effect Imaging using linear phased array transducer","authors":"Mehmet Soner Gozu, Reyhan Zengin, N. G. Gencer","doi":"10.1109/BIYOMUT.2014.7026354","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026354","url":null,"abstract":"Hall Effect Imaging (HEI) is a method used to image conductivity distribution of a biological body. HEI benefits from the interaction of ultrasound with a static magnetic field to generate velocity current density distribution inside the body. Due to the velocity current density, a resultant voltage is sensed by electrodes attached on surface of the body and used for reconstructing the conductivity distribution. In this study, the feasibility of HEI technique using linear phased array transducer is investigated by numerical studies. A model of 16-element linear phased array transducer is used to benefit from electronic properties of directivity and steerability of linear phased array transducer. In addition, a numerical model of breast and tumor medium is formed to analyze the multiphysics solution which couples acoustics and electromagnetic fields. For image reconstruction, Truncated Singular Value Decomposition method is used with different signal-to-noise ratio values.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122403202","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}

{"title":"Assessment of in-vivo skeletal muscle mechanics during joint motion using multimodal magnetic resonance imaging based approaches","authors":"A. Karakuzu, Uluç Pamuk, C. Ozturk, C. Yucesoy","doi":"10.1109/BIYOMUT.2014.7026373","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026373","url":null,"abstract":"The aim of this study is to quantify local deformations in the direction of muscle fibers occurred during joint motion by using specific Magnetic Resonance Imaging (MRI) sequences and post-processing tecniques.Data acquisition was performed within the body of preliminary study with the participaton of a 23 years old healthy male subject. Diffusion Tensor (DT) and Phase Contrast (PC) image sets are acquired during the cyclic ankle movement within the 80°-110° ankle angle range (10° dorsiflexion and 20° plantarflexion) and at the frequency of 0.5 Hz. Post processing techniques were used to quantify fiber direction strain distribution for both of the m. Gastrocnemius and m. Soleus. Fiber direction peak lengthening and shortening values for the m. Gastrocnemius were calculated as 7.1% and 30.8%, respectively. However a significant lengthening was not observed for m. Soleus, fiber direction peak shortening value was calculated as 24.6% for the same muscle. In consideration of this findings, it is noticed that the fiber direction strain distribution is significantly heterogeneous.Moreover, coexistence of the local lengthenings and local shortenings within the fiber direction strain distribution is found to be remarkable. From the clinical perspective,these quantified parameters have a significance to understand movement limitations caused by spasticity and contractures which may occur concominantly.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123308645","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}

{"title":"Investigation the level of neural synchronization by using global field synchronization method in Obsessive Compulsive Disorder","authors":"Mehmet Akif Ozcoban, S. Kara, O. Tan, S. Aydın","doi":"10.1109/BIYOMUT.2014.7026347","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026347","url":null,"abstract":"Obsessive Compulsive Disorder (OCD) is a neuropsychiatric brain disorder disease and diagnosis, treatment process of the disease is used EEG analysis. Recent studies suggested that the OCD is caused by dysfunction in brain's frontal lobe. The GFS that was developed as a novel synchronization criteria, computes phase difference between neural oscillations in the brain. Studies were published that indicates fall of GFS values. In this study, it was investigated how OCD effect phase difference between neuronal oscillations. For this purpose, results of the GFS method was applied to 19 channels EEG, indicates OCD decrease of neural synchronization in brain's frontal lobe at Delta and Beta 3 frequency bands..","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"141 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114523549","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}

{"title":"Last five years of undergraduate biomedical engineering programs in Turkey and predictions for the year of 2020","authors":"G. Ertas, A. U. Keskin","doi":"10.1109/BIYOMUT.2014.7026339","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026339","url":null,"abstract":"In this study, the files published on OSYM web site that consist of the lists of “Higher education degree programs accepting students via central placements” are inspected for a five-year period starting from the year of 2010. Considering the Biomedical engineering programs, universities, quotas and the number of students placed were noted. Using the data noted, several tables and graphs providing valuable information were generated and interpreted. A number of predictions were made for the year of 2020. In both public and private universities, both the number of programs and quotas show increases in the last five year period. Total number of program vs. year and total number of quota vs. year data can be represented by linear curves with positive slopes. The number of students placed in state universities is increasing rapidly and continuously. The increase in the number of students placed in private universities is slower and has a tendency to decrease in the year of 2014. However, the total number of students placed tends to increase and this data can be fitted to a linear curve with a positive slope. The occupancy rate changes from 88% to 80% while it is 100% for public universities independent of years. The occupancy rate in private universities tends to decrease over the years. Considering the 2014 data, quotas provided by most public universities are quite higher than the ones provided by private universities. These high quotas in public universities are provided with secondary education services. The majority of the quotas in private universities are provided for 50% scholarships. The highest quota is provided in Istanbul by private universities. Another city where private universities provide all quotas is Ankara. In Izmir, two halves of the quota are provided by private and state universities. All of the quotas in other cities are provided by public universities. Predictions made for the year of 2020 show that the total quota of biomedical engineering will be 2554, the number of students to be placed will be 2055 and the number of programs will be 43. Private universities are estimated to have 34% occupancy rate. It should be noted that during calculation of this ratio, a 100% of average occupancy rate for the public universities have been considered.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130167343","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}

{"title":"Finger design for anthropomorphic prosthetic hands","authors":"A. Atasoy, S. Kuchimov, E. Toptas, E. Kaplanoglu, S. Takka, M. Ozkan","doi":"10.1109/BIYOMUT.2014.7026391","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026391","url":null,"abstract":"The prototype of a human hand can be has anthropomorphic features when considering the complex structure (anatomy) of the human hand with all its joints, muscles, tendons and their connection. In this study as a starting point an anthropomorphic approach is proposed for the mechanical design of the index finger. For this purpose the mechanical structures of the index finger are reproduced in both real and virtual environments. The results for the simulation and prototype are then compared with each other and the human index finger.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131564853","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}

{"title":"Classification of patients with heart failure","authors":"T. Bayrak, H. Oğul","doi":"10.1109/BIYOMUT.2014.7026353","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026353","url":null,"abstract":"Echocardiography is imaging of anatomy and physiology of heart with high frequency sound waves by using ultrasonic transducers. The signals obtained by using this method are defined as echocardiogram. In this way, the function of heart can be investigated and any abnormal case is determined according to many parameters. In this study, the classification was realized, according to 7 of features obtained from echocardiogram signals belong to 74 of patient in Machine Learning Repository (UCI) database. Naive Bayes was determined as the best classification method for this dataset and 63% sensitivity, 84% specificity, and an accuracy value of 77% has been reached. In conclusion, this study presents an investigation of determination of which features are significant in death based on heart failure.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"52 2-3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131567479","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}

{"title":"Assesment of spasticity via patellar pendulum and muscular-skeletal modelling","authors":"Can Ozcan, Y. Albayrak, S. Bilgin, H. Uysal","doi":"10.1109/BIYOMUT.2014.7026369","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026369","url":null,"abstract":"Spasticity is a movement disorder developing after upper motor neuron lesion. It is the tonus increase associated with movement velocity of extremity muscles, and thus it affects the daily lives of patients. It is quite a common disease as it develops due to lesions in brain and spinal cord. This study defines the electrophysiological characteristics of Patellar T reflex and patellar pendulum which triggered by patellar T reflex. Spasticity changes the responses by utilizing movement features of knee joint during the reflex and pendulum. Muscular-Skeletal simulation is employed to validate and visualize spasticity condition by calculating muscular forces and activation levels compared to EMG data. Also the study attempts to develop a measurement method to be used in spasticity.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128848669","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}

{"title":"Tissue oxygen saturation measurements by using optical fiber spectroscopy: Assessment of free flap perfusion","authors":"A. Kucuksayan, E. Kucuksayan, O. Ozkan, Kerim Unal, Ceren Yilmaz, O. Ozkan, M. Canpolat","doi":"10.1109/BIYOMUT.2014.7026366","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026366","url":null,"abstract":"The free flap is a unit of tissue and is transferred from one site to another with the aim of improving form and function while maintaining its own blood supply. A perfusion with sufficient tissue oxygenation is important for the survival of free flaps. The gold standard method for monitoring free flap has yet to be established. Many failing free flaps can be salvaged with early identification and prompt intervention. Therefore clinicians underscores for the importance of reliable postoperative flap monitoring. The aim of this study is to develop a spectroscopic system running non-invasive in real time to measure local tissue oxygen saturation in vivo and to investigate the sensitivity and specificity of the method in postoperative flap viability monitoring. The experimental set up for the spectroscopic measurements was consists of a miniature spectrometer, a fiber optical probe, a halogen-tungsten light source and a laptop. In the study, human blood samples with different level of oxygen saturations have been prepared and spectra were acquired using a fiber optical probe to investigate correlation between the oxygen saturations and the spectra. Then this method was used to determine tissue viability in postoperative flap cases. The results suggested that fiber optical spectroscopy is a sensitive method to estimate the StO2 levels in vivo. The technique developed to measure tissue StO2 has potential to improve bedside monitoring device for assess tissue perfusion and follow up prognosis of flap.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116772139","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}

{"title":"Design of an electrical stimulator and somatosensory evoked potentials (SEP)","authors":"Mahmud Esad Arar, Burak Guclu, M. Ozkan","doi":"10.1109/BIYOMUT.2014.7026359","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026359","url":null,"abstract":"This study includes the design, electrical and physiological tests of an electrical stimulator that is able to excite nerves and muscles. The device consists of 3 different units which are stimulator, power supply and computer interface. The stimulator unit includes 3 parts which are; a voltage-current convertor by a power op amp, isolation and an external device trigger parts. The device has an external power supply unit in order to supply high voltage for power op amp. The system is controlled and driven by a computer interface designed in LabVIEW and the interface drives stimulator via audio output of a computer. Physiological tests were performed under the supervision of authorized people. Data of this study is compared with literature data.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124019349","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}

{"title":"Analysis of gaze characteristics with eye tracking in elite athletes: A pilot study","authors":"T. Balcıoğlu, Duygu Sahin, M. Assem, Saliha B. Selman, D. G. Duru","doi":"10.1109/BIYOMUT.2014.7026345","DOIUrl":"https://doi.org/10.1109/BIYOMUT.2014.7026345","url":null,"abstract":"Eye movements are essential for natural vision. Eye tracking technology is being used in research in many disciplines to examine the differences in the visual attention of experts and novices. Eye tracking research in sports focuses in the performance of athletes and its relation with perceptual processes. The aim of these studies relies in training the visual behavior of the athletes and to arrange trainings to increase their performance. In this study, the elite group is the Karate-Do players, and the aim is to extract their visual behavioral characteristics and patterns, to explore their gaze strategies, and the differences in their perception, attention and judgement. The experimental paradigm is a Kata and Bunkai video montage from World championships, where the elite athletes are asked to follow the techniques of the players, and the controls, which are interested in Karate-Do but not ever tried it, are asked to follow the movements of the players. During this time the eye tracking is done, and average fixation times, and dwell time in each area of interest have been calculated, and a significant difference between the two groups has been detected. The elite athletes have less fixation counts but longer fixation time compared to controls. So the professionals are not only extracting information from the center, but also from the peripheral areas. This finding is in agreement with the eye tracking literature. Future works will rely in investigating Karate-Do players from varying Karate-Do branches in groupwise comparison.","PeriodicalId":428610,"journal":{"name":"2014 18th National Biomedical Engineering Meeting","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126581675","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}