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Calibrated Linear Array-Driven Photoacoustic/Ultrasound Tomography.
Oeri, Milan; Bost, Wolfgang; Tretbar, Steffen; Fournelle, Marc.
Afiliação
  • Oeri M; Fraunhofer Institute for Biomedical Engineering (IBMT), Medical Ultrasound Group, St. Ingbert, Germany. Electronic address: Milan.oeri@ibmt.fraunhofer.de.
  • Bost W; Fraunhofer Institute for Biomedical Engineering (IBMT), Medical Ultrasound Group, St. Ingbert, Germany.
  • Tretbar S; Fraunhofer Institute for Biomedical Engineering (IBMT), Medical Ultrasound Group, St. Ingbert, Germany.
  • Fournelle M; Fraunhofer Institute for Biomedical Engineering (IBMT), Medical Ultrasound Group, St. Ingbert, Germany.
Ultrasound Med Biol ; 42(11): 2697-2707, 2016 11.
Article em En | MEDLINE | ID: mdl-27523424
The anisotropic resolution of linear arrays, tools that are widely used in diagnostics, can be overcome by compounding approaches. We investigated the ability of a recently developed calibration and a novel algorithm to determine the actual radial transducer array distance and its misalignment (tilt) with respect to the center of rotation in a 2-D and 3-D tomographic setup. By increasing the time-of-flight accuracy, we force in-phase summation during the reconstruction. Our setup is composed of a linear transducer and a rotation and translation axis enabling multidimensional imaging in ultrasound and photoacoustic mode. Our approach is validated on phantoms and young mice ex vivo. The results indicate that application of the proposed analytical calibration algorithms prevents image artifacts. The spatial resolution achieved was 160 and 250 µm in photoacoustic mode of 2-D and 3-D tomography, respectively.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Processamento de Imagem Assistida por Computador / Tomografia Computadorizada por Raios X / Ultrassonografia / Técnicas Fotoacústicas Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Animals Idioma: En Revista: Ultrasound Med Biol Ano de publicação: 2016 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Processamento de Imagem Assistida por Computador / Tomografia Computadorizada por Raios X / Ultrassonografia / Técnicas Fotoacústicas Tipo de estudo: Diagnostic_studies / Prognostic_studies Limite: Animals Idioma: En Revista: Ultrasound Med Biol Ano de publicação: 2016 Tipo de documento: Article