{"title":"Ultrasound propagation velocity and acoustic attenuation on agarose phantoms' in three different manufacture techniques","authors":"D. Oliveira, T. Santos, L. Maggi, R. Costa-Felix","doi":"10.1109/PAHCE.2014.6849627","DOIUrl":"https://doi.org/10.1109/PAHCE.2014.6849627","url":null,"abstract":"Ultrasonic phantoms are probe bodies used to mimic the ultrasound properties of biologic tissues. Agarose phantoms are the most widely used of the soft tissue mimics. The IEC 60601-2-37 (2007) describes a recipe of soft tissue mimic material, but some details on its manufacture process are not well defined (for example the stirring technic). In this study agarose-based tissue phantoms based on IEC 60601-2-37 (2007) were made using three different manufacture methods (manual, mechanical or magnetic stirring). The acoustic properties (ultrasound propagation velocity and attenuation coefficient) of the phantoms were determined with their respective uncertainty. Visual differences can be observed between the phantoms for the three different manufacture technics. Phantoms' ultrasound propagation velocity values were in accordance with IEC 60601-2-37 (2007) and compatible with soft biological tissue. Phantoms' acoustic attenuation differs with the different stirring techniques. Acoustic attenuation values were compatible with soft biological tissue, but higher than normative TMM (this was expected as granulation of Al2O3, used as a backscatter, was higher than in the standard). This study promotes advances in ultrasonic phantoms manufacture.","PeriodicalId":196438,"journal":{"name":"2014 Pan American Health Care Exchanges (PAHCE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131723294","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":"Effect of the amount of sub-bands in the performance of discrete wavelet transform based dynamic S-EMG signals encoder","authors":"M. H. Trabuco, M. V. C. Costa, F. Nascimento","doi":"10.1109/PAHCE.2014.6849642","DOIUrl":"https://doi.org/10.1109/PAHCE.2014.6849642","url":null,"abstract":"This paper evaluates the effect of varying the number of bit allocation sub-bands that segment the transformed wavelet spectrum in an eletromyographic signal encoder. This study investigates the optimal number of sub-bands in the segmented wavelets transform spectrum, which is used in the quantizing algorithm. The criteria of objective evaluation is based on percent residual difference (PRD) and compression factor (CF). In the computational simulations, were implemented and compared two methods of allocating bits: linear decreasing spectral shape and hyperbolic tangent decreasing spectral shape.","PeriodicalId":196438,"journal":{"name":"2014 Pan American Health Care Exchanges (PAHCE)","volume":"252 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116725645","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}
A. P. M. Moraes, B. S. Fagundes, L. S. de Lima, T. P. Omena, J. F. Costa, R. M. Costa, W. Pereira
{"title":"Evaluation of the therapeutic ultrasound immersion technique applied in phantom","authors":"A. P. M. Moraes, B. S. Fagundes, L. S. de Lima, T. P. Omena, J. F. Costa, R. M. Costa, W. Pereira","doi":"10.1109/PAHCE.2014.6849628","DOIUrl":"https://doi.org/10.1109/PAHCE.2014.6849628","url":null,"abstract":"The present work evaluate the heating pattern of therapeutic ultrasound using immersion technique in a phantom of fat tissue made of silicone in different distances. Five tests were performed in each of six positions: 0, 1, 2, 3, 5 and 10 cm apart from the transducer surface, at 1 MHz, continuous mode and effective intensity 1.05 W·cm-2 for 180s. In the most superficial thermocouple, there was decrease in the temperature from the distance 0 cm to 1 cm and the following distances (2, 3, 5 and 10 cm) also experienced reduction above 90% of the average value at 0 cm. In thermocouples 2, 3 and 4 there was no significant difference with increasing distance from the transducer to the phantom.","PeriodicalId":196438,"journal":{"name":"2014 Pan American Health Care Exchanges (PAHCE)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129326346","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":"Dynamic control in human masticatory process","authors":"J. Serafim, T. F. Lucena, S. R. F. Rosa","doi":"10.1109/PAHCE.2014.6849639","DOIUrl":"https://doi.org/10.1109/PAHCE.2014.6849639","url":null,"abstract":"With the rising number of obesity at the world level, several researches are carried out for the purpose to identify the other causes and alternative treatment of this disease. This paper relates to the process of human mastication levels of obesity, based on the literature that discusses this relationship. In it, we propose a model of dynamic control of the human masticatory process applied to an intelligent fork, which, in addition to also identifies the speed and amount of food ingested.","PeriodicalId":196438,"journal":{"name":"2014 Pan American Health Care Exchanges (PAHCE)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126109964","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 a prototype for managing pain Phantom Limb Syndrome in patients with upper extremity amputation","authors":"T. Andrea, F. R. Angélica, L. Henry","doi":"10.1109/PAHCE.2014.6849641","DOIUrl":"https://doi.org/10.1109/PAHCE.2014.6849641","url":null,"abstract":"This paper presents research outcomes of the project “design and implementation of a control pain prototype on adult patients who had suffered upper arm amputation (above elbow) and have the Phantom Limb Syndrome. The prototype includes two components: first, a stimulator circuit with three types of electric current that allows to manage the analgesic effect, known as galvanic current, TENS (Transcutaneous Electrical Nerve Stimulation) and fixed difase (FD) and, second, a video software that duplicates the not amputated limb. The image in movement produces a visual deceive in which the brain processes the visual stimulation as true and the motor stimulation as false. When the brain realizes that the amputated limb is not moving, pain diminishes. The simultaneous combination of electrical and visual stimulus generated by the prototype has been applied in pain diminishing therapy, contributing to the life quality of this kind of patients.","PeriodicalId":196438,"journal":{"name":"2014 Pan American Health Care Exchanges (PAHCE)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122579210","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}