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• W2741016072 abstract "OBJETIVO: Criar um atlas de cintilografia de perfusao miocardica e verificar sua aplicabilidade no auxiliocomputadorizado a deteccao de defeitos perfusionais miocardicos em pacientes portadores de cardiopatiaisquemica. MATERIAIS E METODOS: O atlas foi criado com imagens de cintilografia de perfusao miocardica,em condicoes de repouso e estresse, de 20 pacientes de ambos os generos com baixa probabilidade dedoenca arterial coronariana e julgadas normais por dois observadores experientes. Tecnicas de registro deimagens e operacoes matematicas sobre imagens foram utilizadas para obtencao de modelos de media edesvio-padrao da captacao miocardica percentual de cada genero e condicao fisiologica. RESULTADOS:Imagens de um paciente masculino e um feminino foram alinhadas com os atlas correspondentes, e os voxelsapresentando valores de captacao percentual dois desvios-padrao abaixo da media da respectiva regiao doatlas foram destacados nos cortes tomograficos e confirmados como defeitos de perfusao por dois observa-dores experientes. CONCLUSAO: Demonstramos a criacao de um atlas de cintilografia de perfusao miocar-dica e obtivemos resultados promissores na sua utilizacao para auxilio a deteccao de defeitos perfusionais.Entretanto, uma validacao prospectiva com um numero mais representativo de casos e necessaria.Unitermos: Cintilografia; SPECT; Miocardio; Medicina nuclear; Processamento de imagem assistida porcomputador; Diagnostico por computador.OBJECTIVE: To develop an atlas of myocardial perfusion scintigraphy and evaluating its applicability incomputer-aided detection of myocardial perfusion defects in patients with ischemic heart disease. MATERIALSAND METHODS: The atlas was created with rest-stress myocardial perfusion scintigraphic images of 20patients of both genders with low probability of coronary artery disease and considered as normal by twoexperienced observers. Techniques of image registration and mathematical operations on images wereutilized for obtaining template images depicting mean myocardial uptake and standard deviation for eachgender and physiological condition. RESULTS: Myocardial perfusion scintigraphy images of one male andone female patient were aligned with the corresponding atlas template image, and voxels with myocardialuptake rates two standard deviations below the mean voxel value of the respective region in the atlastemplate image were highlighted on the tomographic sections and confirmed as perfusion defects by bothobservers. CONCLUSION: The present study demonstrated the creation of an atlas of myocardial perfusionscintigraphy with promising results of this tool as an aid in the detection of myocardial perfusion defects.However, further prospective validation with a more representative sample is recommended.Keywords: Scintigraphy; SPECT; Myocardium; Nuclear medicine; Computer-assisted image processing;Computer-assisted diagnosis." @default.
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• W2741016072 title "Auxílio à detecção de anormalidade perfusional miocárdica utilizando atlas de SPECT e registro de imagens: resultados preliminares* Aid in the detection of myocardial perfusion abnormality utilizing SPECT atlas and images registration: preliminary results" @default.
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