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Abstract(s)
A avaliação do estudo das relações patelofemorais (PF) por Tomografia Computorizada (TC) ´e amplamente utilizada para avaliação da instabilidade da articulação do joelho. Ao longo do tempo esta modalidade de imagem foi aprimorada através da quantificação das várias causas ou indicadores existentes na articulação do joelho com tradução imagiológica em TC, através de medições.
Para determinar a avaliação de instabilidade estão definidas um conjunto de 10 medições bilaterais efectuadas à articulação do joelho em posição neutra, relaxada e com estímulo dinâmico, contração do músculo quadricípital e flexão dos dois joelhos a cerca de 30º.
A forma de proceder à execução das medições está bem definida na bibliografia existente.
O que não foi avaliada ´e a variabilidade destas medidas quando a mesma é realizada por observadores diferentes. Para fazer a quantificação da variabilidade das medições do estudo FP por TC foram recolhidos, retrospectivamente, 20 casos clínicos que foram medidos por 3 técnicos, ou observadores, diferentes, 2 vezes cada um dos casos, com recurso a 2 softwares distintos, um manual e outro semiautomático.
Este trabalho pretende compreender se há variabilidade em diferentes cenários possíveis de encontrar na prática clínica. O primeiro cenário pretende avaliar e quantificar a variabilidade dos mesmos dados quando medidos em dois momentos diferentes pelo mesmo observador, intra-variabilidade. O segundo cenário pretende avaliar e quantificar a variabilidade dos mesmos dados quando medidos em dois momentos diferentes por observadores diferentes, inter-variabilidade. Por ´ultimo, prevê-se quantificar a variabilidade quando os mesmos dados são medidos pelo mesmo observador em softwares de medição diferentes.
A quantificação desta variabilidade vai ajudar a compreender em que termos é que estas medições estão a ser efectuadas, nomeadamante a ajudar na compreensão e detecção de possíveis erros sistemáticos. A possibilidade de sistematizar o processo para que este se torne mais ágil, rápido e produza dados reprodutíveis só será possível depois de ser conhecido e quantificado o processo que é, actualmente, executado.
A aspiração futura deste trabalho é servir de base à automatização das medições de forma a reduzir toda a subjcetividade do processo, melhorando-o.
The evaluation of the study of the patellofemoral disease (PF) by Computed Tomography (CT) is widely used to evaluate the knee joint stability. Through time this image modality was improved through the quantification of the several causes or indicators that there exist in the knee joint with imagiological translation in CT, through measurements. To determine the evaluation of the instability are defined a set of ten bilateral measurements done to the knee joint in a neutral and relaxed position and with dynamic stimulation, contraction of the quadricipital muscle and flexion of both knees on about thirty degrees. The procedure of measurement is clearly set in the existing bibliography about the theme. What hasn’t been evaluated is the variability of these measurements when performed by different observers. I order to make the variability quantification of the measurements of the study, PF by CT were collected, retrospectively, twenty clinical cases that were measured by three technicians, or watchers, all different, two times in each case, with the use of to two different software, one manual and another semi- automatic. These project has the intention to understand if there is variability in different possible sceneries found in the clinical practice. The first objective intends to evaluate and quantify the variability of the same data when measured in two different moments by the same observer, intra-variability. The second objective wishes to evaluate and quantify the variability of the same date when measured in two different moments by different observers, inter- variability. At last, is predicted to quantify the variability when the same data is measured by the same observer in software of diferente measurements. The quantification of this variability will help to understand in what terms are these measurements being executed, namely to help to the comprehension and detection of possible systematic errors. The possibility to systematise the process in order to make it agiler, faster and that produces reproductive data will only be possible after being known and quantified the process that is, nowadays, in practice. The future intent of this work is to be a base to the automatization of measurements in order to reduce all the process subjectivity, improving it.
The evaluation of the study of the patellofemoral disease (PF) by Computed Tomography (CT) is widely used to evaluate the knee joint stability. Through time this image modality was improved through the quantification of the several causes or indicators that there exist in the knee joint with imagiological translation in CT, through measurements. To determine the evaluation of the instability are defined a set of ten bilateral measurements done to the knee joint in a neutral and relaxed position and with dynamic stimulation, contraction of the quadricipital muscle and flexion of both knees on about thirty degrees. The procedure of measurement is clearly set in the existing bibliography about the theme. What hasn’t been evaluated is the variability of these measurements when performed by different observers. I order to make the variability quantification of the measurements of the study, PF by CT were collected, retrospectively, twenty clinical cases that were measured by three technicians, or watchers, all different, two times in each case, with the use of to two different software, one manual and another semi- automatic. These project has the intention to understand if there is variability in different possible sceneries found in the clinical practice. The first objective intends to evaluate and quantify the variability of the same data when measured in two different moments by the same observer, intra-variability. The second objective wishes to evaluate and quantify the variability of the same date when measured in two different moments by different observers, inter- variability. At last, is predicted to quantify the variability when the same data is measured by the same observer in software of diferente measurements. The quantification of this variability will help to understand in what terms are these measurements being executed, namely to help to the comprehension and detection of possible systematic errors. The possibility to systematise the process in order to make it agiler, faster and that produces reproductive data will only be possible after being known and quantified the process that is, nowadays, in practice. The future intent of this work is to be a base to the automatization of measurements in order to reduce all the process subjectivity, improving it.
Description
Keywords
Relações Patelofemorais Instabilidade Tomografia Computorizada TA-GT Medições Patellofemoral Disease Instability Computed Tomography Measurements