dc.contributorMaia, Joaquim Miguel
dc.contributorhttp://lattes.cnpq.br/6369674496221915
dc.contributorAssef, Amauri Amorin
dc.contributorSchneider, Fábio Kurt
dc.contributorhttp://lattes.cnpq.br/0720172921923496
dc.contributorhttp://lattes.cnpq.br/1463591813823167
dc.contributorMaia, Joaquim Miguel
dc.contributorRodrigues, Marco Aurélio Benedetti
dc.contributorValente, Solivan Arantes
dc.contributorMiranda, Caio Marcelo de
dc.contributorMalthez, Anna Luiza Metidieri
dc.creatorSchiefler Junior, Nivaldo Theodoro
dc.date.accessioned2019-03-01T14:06:21Z
dc.date.accessioned2022-12-06T14:19:25Z
dc.date.available2019-03-01T14:06:21Z
dc.date.available2022-12-06T14:19:25Z
dc.date.created2019-03-01T14:06:21Z
dc.date.issued2018-12-13
dc.identifierSCHIEFLER JUNIOR, Nivaldo Theodoro. Geração de imagens por ultrassom utilizando as técnicas sparse arrays e plane wave. 2018. 126 f. Tese (Doutorado em Engenharia Elétrica e Informática Industrial) - Universidade Tecnológica Federal do Paraná, Curitiba, 2018.
dc.identifierhttp://repositorio.utfpr.edu.br/jspui/handle/1/3930
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5246437
dc.description.abstractNowadays, the major difficulties to improve the quality of the images using the ultrasonic techniques are related to the high number of shots used for transducer excitation, large quantities of storage data and the necessary computer processing for imaging. The purpose of this work is to evaluate the technique of image generation by ultrasound using the Stolt migration, based in plane wave and sparse arrays in the ultrasonic data reception. The plane wave technique was used to allow the increase of the frame rate by decreasing the number of shots of the ultrasound transducer elements. Simulations were made using a phantom developed in the Field II program in a Matlab environment and the actual data were acquired using the Verasonics Vantage 128 platform, with the 128-element L11-4v linear transducer. The simulated images were obtained by using a shooting sequence with angle variations for the 128 elements in the transmission and 128, 65, 44 and 23 elements for sparse arrays in the reception. The analysis of the results was accomplished by evaluating the axial and lateral resolutions using the FWHM criterion and the image quality with the criteria of contrast, MSE, SNR, PSNR and SSIM in the experimental and simulated images by using Stolt’s migration with plane wave and sparse arrays processing and the traditional DAS method. Qualitatively and quantitatively, the generated images by the proposed method showed similar results when compared in terms of the lateral and axial resolutions as well the quality image criteria. According to the results and the proposed processing method, the best sparse condition was obtained with 65 elements, indicating that the sparse reception suggested by the technique can be used for ultrasound image processing.
dc.publisherUniversidade Tecnológica Federal do Paraná
dc.publisherCuritiba
dc.publisherBrasil
dc.publisherPrograma de Pós-Graduação em Engenharia Elétrica e Informática Industrial
dc.publisherUTFPR
dc.rightsopenAccess
dc.subjectUltrassom
dc.subjectUltrassonografia
dc.subjectDiagnóstico por ultrassom
dc.subjectProcessamento de imagens - Técnicas digitais
dc.subjectTransdutores
dc.subjectUltrasonics
dc.subjectUltrasonic imaging
dc.subjectDiagnostic ultrasonic imaging
dc.subjectImage processing - Digital techniques
dc.subjectTransducers
dc.titleGeração de imagens por ultrassom utilizando as técnicas sparse arrays e plane wave
dc.typedoctoralThesis


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