Browsing by Author "Ferreira, Rayssa Lopes Dantas"
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- An antibiogram classification system based on an hybrid hough transform and gradient approachPublication . Ferreira, Rayssa Lopes Dantas; Amaral, Joana S.; Igrejas, Getúlio; Rodrigues, Pedro JoãoThe antibiogram performed by the disc diffusion method is a test frequently used in clinical microbiology. In this test, the result is given by the diameter of the inhibition zone formed around the antibiotic disc. In general, this measurement is performed manually. The main objective of this work was to develop an automatic image analysis system to assess the susceptibility of microorganisms to different antibiotics. As a first step, several images of antibiograms were obtained. Subsequently the images were subjected to image processing techniques. After the elimination of noise, the Hough transform was used to detect the antibiotic discs. Next, from the center of each identified disc, the inhibition zone was detected recurring to a gradient method. According to the diameter of the inhibition zone a susceptibility classification was made. The results prove the validity of the developed tool to detect the antibiotics discs and to segment the inhibition zones used in microorganism’s susceptibility evaluation.
- An antibiogram classification system based on an hybrid hough transform and gradient approachPublication . Ferreira, Rayssa Lopes Dantas; Amaral, Joana S.; Igrejas, Getúlio; Rodrigues, Pedro JoãoThe antibiogram performed by the disc diffusion method is a test frequently used in clinical microbiology. In this test, the result is given by the diameter of the inhibition zone formed around the antibiotic disc. In general, this measurement is performed manually. The main objective of this work was to develop an automatic image analysis system to assess the susceptibility of microorganisms to different antibiotics. As a first step, several images of antibiograms were obtained. Subsequently the images were subjected to image processing techniques. After the elimination of noise, the Hough transform was used to detect the antibiotic discs. Next, from the center of each identified disc, the inhibition zone was detected recurring to a gradient method. According to the diameter of the inhibition zone a susceptibility classification was made. The results prove the validity of the developed tool to detect the antibiotics discs and to segment the inhibition zones used in microorganism’s susceptibility evaluation.
- An antibiogram classificattion system based on an hybrid hough transform and gradient approachPublication . Ferreira, Rayssa Lopes Dantas; Amaral, Joana S.; Igrejas, Getúlio; Rodrigues, Pedro JoãoThe antibiogram performed by the disc diffusion method is a test frequently used in clinical microbiology. In this test, the result is given by the diameter of the inhibition zone formed around the antibiotic disco In general, this measurement is performed manually. The main objective of this work was to develop an automatic image analysis system to assess the susceptibility of microorganisms to different antibiotics. As a first step, several images of antibiograms were obtained. Subsequently the images were subjected to image processing techniques. After the elimination of noise, the Hough transform was used to detect the antibiotic discs. Next, from the center of each identified disc, the inhibition zone was detected recurring to a gradient method. According to the diameter of the inhibition zone a susceptibility classification was made. The results prove the validity of the developed tool to detect the antibiotics discs and to segment the inhibition zones used in microorganism's susceptibilfty evaluation.
- Que serviço de imagiologia para Cabo Verde, um país arquipelágico?Publication . Ferreira, Rayssa Lopes Dantas; Monteiro, Fernando C.Os sistemas de saúde, quaisquer que sejam eles, têm como objetivo principal melhorar o estado de saúde da população devendo, para este efeito, colocar à disposição dos cidadãos serviços adequados. Neste sentido, os progressos verificados ao longo dos anos no ramo imagiológico, sempre estiveram intimamente ligados ou potenciaram o desenvolvimento ocorrido noutras áreas da medicina. Esse facto foi determinante para a melhoria do conhecimento e diagnóstico das patologias do ser humano. Tendo em vista a importância que esta área vem tendo no que diz respeito ao diagnóstico e tratamento de doenças, este estudo incidiu sobre o Serviço de Imagiologia existente em Cabo Verde. Tem como principais objetivos entender melhor o funcionamento do serviço público, apresentou-se uma proposta de intervenção, indicando medidas que deverão ser aplicadas para melhoria do serviço atual tanto a nível da distribuição dos equipamentos, padronização da marca dos mesmos, apontar a necessidade da criação de um plano de manutenção preventiva e ainda medidas para melhorar os défices de pessoal existente, e repensar o conceito de telemedicina para redução da necessidade de evacuações tanto internas como externas. Foi utilizado como metodologia a recolha de dados quantitativos referente aos recursos humanos e à sua distribuição, pesquisas bibliográficas baseando-se em relatórios estatísticos. Uma das motivações para o tema escolhido, foi fazer um estudo que poderá servir de auxílio no desenvolvimento de planos para melhoria deste serviço a nível prático. Concluiu-se que há medidas práticas que se poderão adotar para melhoria do serviço de imagiologia atual, focando primeiramente na criação de um Serviço de Instalação de Equipamentos e na criação de planos para descentralizar a distribuição de recursos humanos.