M. Parente, M. G. Barros, L. Brasil, C. Abreu, A. P. B. Silva, J. Lamas
{"title":"Three dimensional modeling applied to breast cancer","authors":"M. Parente, M. G. Barros, L. Brasil, C. Abreu, A. P. B. Silva, J. Lamas","doi":"10.1109/PAHCE.2011.5871891","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871891","url":null,"abstract":"This paper presents three-dimensional modeling as a tool for education in health, being the object for integration with Virtual Reality and Artificial Intelligence. The choose for the application area was the anatomical structure of the breast, especially for the importance of a clinical model for virtual training aid in the detection of breast cancer.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125852857","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":"Noise cancellation technique for Doppler ultrasound spectrogram enhancement","authors":"B. Zabihian, C. Teixeira, M. Ruano","doi":"10.1109/PAHCE.2011.5871870","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871870","url":null,"abstract":"Doppler ultrasound (DU) automatic detection of clinically relevant blood flow spectral parameters may be a difficult task when the spectrogram is corrupted with different types of noise. This paper introduces a technique to eliminate the spectrogram background noise without damaging the blood flow signals' content. Tests were performed on simulated signals with known spectral characteristics. Different signal to noise ratios were tested. Results of 100 signals were averaged. Based on the STFT spectrogram the center frequency and bandwidth of the simulated noisy signals were computed and evaluated against the deterministic curve. Results obtained by defining the background area of DU simulated signals and applying 7% of Cancellation level on signals with 10 dB of signal-to-noise ratio (SNR) produced mean frequency estimations with a maximum bias of 106 Hz. The maximum bias of the bandwidth estimations in this case was 124 Hz. Since the sampling frequency of the DU simulated signals were 12800 Hz, usage of the proposed noise cancelation technique enabled spectral parameters estimations with meaningless errors demonstrating the effectiveness of the proposed technique.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123672804","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}
F. T. Paiva, V. R. S. Rocha, C. Benac, J. V. Theodosio, F. P. Schwartz, M. G. Bastos, Alfredo Ferreira Filho, Belford Roxo
{"title":"Oriented dialogue in the treatment of Rasmussen's encephalitis","authors":"F. T. Paiva, V. R. S. Rocha, C. Benac, J. V. Theodosio, F. P. Schwartz, M. G. Bastos, Alfredo Ferreira Filho, Belford Roxo","doi":"10.1109/PAHCE.2011.5871880","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871880","url":null,"abstract":"Rasmussen's encephalitis (RE) is a rare but severe brain disorder of unknown origin with chronic inflammatory features. A particular challenge is the early recognition of the disease, before progressive loss of neurological functions is evident. The treatment is surrounded by uncertainty because there are few cases reported by the scientific community around the world. This work reports the use of the Oriented Dialog technique in the case of a 10-year-old boy with a RE diagnose. Results showed good perspectives for the used technique as an efficient resource for the RE treatment.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122462375","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}
J. S. Gonzalez, I. S. Dominguez, Mónica Vázquez Hernández, M. F. Cruz, D. F. G. Nocetti, Juan Prohías Martínez, Alejandro Villar Inclán, L. L. Salas
{"title":"On the evaluation a an ultrasonic transducer response using a fixing angle device in the acquisition of Doppler blood flow signals during coronary graft surgery","authors":"J. S. Gonzalez, I. S. Dominguez, Mónica Vázquez Hernández, M. F. Cruz, D. F. G. Nocetti, Juan Prohías Martínez, Alejandro Villar Inclán, L. L. Salas","doi":"10.1109/PAHCE.2011.5871868","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871868","url":null,"abstract":"This paper proposes the design and use of a device which will fix the angle of an ultrasonic transducer used in the acquisition of Ultrasonic Doppler signals during coronary graft surgery. The aim of this device is to act as a tool which will guide the surgeon to position the ultrasonic transducer in the correct angle and plane which is essential on the calculation of the blood flow through the implanted graft. An experimental set-up has been implemented in order to evaluate the transducer response when used with the device. The radiation fields and attenuation due to the presence of the device are discussed and analyzed. Results show the effectiveness of the device in handling the transducer and warranty the quality of the acquired signals and measurements.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"4 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122598329","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":"Virtual system for training and evaluation of candidates to use a myoelectric prosthesis","authors":"Barraza-Madrigal Jose Antonio, M. Roberto","doi":"10.1109/PAHCE.2011.5871890","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871890","url":null,"abstract":"The present paper, explains the evaluation system used in candidates to use a myoelectric prosthesis control, for upper limb amputation above the elbow joint. Which bases its operation on strength levels as a result to voluntary isometric contractions, generated by both biceps and triceps muscles. This system is classified into 2 methods of evaluation; online and evaluation by processing data. Both use statistical methods to determine variations in the responses obtained during the training process trough a virtual environment with the aim of establishing whether there is progress compared to the training time. Also determine whether the user is able to generate voluntary isometric contractions, for the control of a myoelectric prosthesis.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114571150","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":"Portable and tunable continuous wave driver from 1 MHz to 10 MHz for HIFU transducers","authors":"R. Martínez, A. Vera, L. Leija","doi":"10.1109/PAHCE.2011.5871862","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871862","url":null,"abstract":"High Intensity Focused Ultrasound (HIFU) is a non-invasive technique used for oncology treatment, by causing tumor ablation. This paper presents the construction of a portable and tunable continuous wave driver to excite HIFU transducers. Driver consists of a frequency generator with adjustable resolution (10 kHz or 100 kHz increments) and 50Ω output impedance, a radiofrequency amplifier and a 1.965 MHz HIFU transducer. System characterization (frequency measurements, HIFU transducer electrical/acoustical characterization and amplifier power response) and ablation experiments in tissue mimicking phantoms are presented in this paper. HIFU transducer was driven with a 6.76 W continuous wave, during 3 min, which was gradually risen up to 50.118 W. The result at 52 s is a visible lesion inside the phantom. The lesion has a cigar shape at the focus distance (17 mm). Temperature at the focus reached 98.3°C.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128649406","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":"Change in strain image contrast with applied compression evaluated via finite elements analysis","authors":"T. Pavan, A. Carneiro","doi":"10.1109/PAHCE.2011.5871885","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871885","url":null,"abstract":"Finite elements analysis (FEA) simulations showed that small strain shear modulus and the nonlinear behavior play roles in the changes of image contrast as the material deforms. The clinical relevance of this work is that nonlinear elasticity of the object being imaged may not only affect the image quality during strain imaging but might also provide information that can be used to differentiate tissues based on their nonlinear behaviors.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129455292","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}
J. D. Costa, D. B. Melges, R. Almeida, A. Infantosi
{"title":"Detecting response of somatosensory evoked potentials from averages with small number of epochs using Self-Organizing Map","authors":"J. D. Costa, D. B. Melges, R. Almeida, A. Infantosi","doi":"10.1109/PAHCE.2011.5871907","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871907","url":null,"abstract":"The aim of this work was to use the Self-Organizing Map (SOM) algorithm to classify EEG signals collected during somatosensory stimulation. Third-six volunteers participated and the signals were classified as containing or not cortical stimuli-response. Five features were used to characterize the signals, referring to the averages' amplitude, latency and power spectral density using 500, 100 and 50 epochs. The SOM results clearly showed an adequate distinction between the two classes for 500 and 100 epochs. The SOM grid's sizes were determined by applying non-parametric bootstrap technique.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126791953","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}
E. Cichaczewski, J. Maia, P. Nohama, E. M. Novak, H. Teive, A. Assef
{"title":"Electronic device to help the diagnosis of Parkinsonian and Essential Tremor","authors":"E. Cichaczewski, J. Maia, P. Nohama, E. M. Novak, H. Teive, A. Assef","doi":"10.1109/PAHCE.2011.5871930","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871930","url":null,"abstract":"This work describes the methods applied and the obtained results with a developed electronic device capable to measure human tremor. It uses accelerometers as sensors, which does the measurements in two dimensions. A software was developed to be used as the system interface and stores the measured tremor time series using a portable microcomputer. The system was statically and dynamically calibrated to ensure that its measurements are effective. The tremors frequency is calculated using the FFT algorithm. The system was submitted to the ethics committee of the University Hospital (HC-UFPR) in Curitiba-PR, Brazil, and it was tested in 17 volunteers with Essential Tremor and 62 volunteers with Parkinsonian Tremor. The results obtained have shown that it is statistically possible to differentiate the frequencies of both tremor types.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126820971","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":"Low cost human computer interface voluntary eye movement as communication system for disabled people with limited movements","authors":"L. J. G. Vazquez, M. A. Minor, A. Sossa","doi":"10.1109/PAHCE.2011.5871871","DOIUrl":"https://doi.org/10.1109/PAHCE.2011.5871871","url":null,"abstract":"The ability to identify the location of human pupil offers us the possibility to know the eye gaze target of a person. This infers the possibility to create new methods of human-machine interaction. Nevertheless there are some barriers and restrictions that are shown in the integrations, as intrusion, robustness, availability and price of the eye track systems. This paper describes the develop and usability of an eye gaze input system using a web cam with infrared LEDs over a head mounting system. Most available eye gazing with head mounting have two characteristic that hinder being widely used as human computer interfaces. The first is represented by the need of a calibration stage before the use; the second is about the low tolerance for head movements during all the using time. This work solved that problem using a 3 axis accelerometer as head tilt sensor to make a compensation. Our main objective is to create a communication system for people with motor disabilities based exclusively in self-inflicted ocular movement.","PeriodicalId":368657,"journal":{"name":"2011 Pan American Health Care Exchanges","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116284052","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}