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Implementation of sector imaging mode with high signal-to-noise ratio in the high frame rate ultrasonic imaging system / 生物医学工程学杂志
Journal of Biomedical Engineering ; (6): 25-29, 2006.
Article Dans Chinois | WPRIM | ID: wpr-309893
ABSTRACT
The high frame rate (HFR) ultrasonic imaging system, which is developed with limited diffraction beams, constructs images at a high frame rate. However the rectangular imaging area, to some extent, restricts the far field imaging information. At the same time, because of one transmission for constructing image, the system suffers from low SNR. In this paper we present a computationally efficient method to construct sector mode image and to increase the SNR in HFR system. The method uses Golay complementary sequence as excitation to realize two transmission events. Each event simultaneously transmits two plane waves with different transmission angle. Then the received echo signals related to different angle are separated according to orthogonality of Golay complementary sequence and used to construct two images of different area by HFR method. Finally the two images are synthesized to one frame of sector mode image.
Sujets)
Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Traitement d'image par ordinateur / Amélioration d'image / Échographie / Imagerie tridimensionnelle / Méthodes Type d'étude: Etude diagnostique langue: Chinois Texte intégral: Journal of Biomedical Engineering Année: 2006 Type: Article

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Texte intégral: Disponible Indice: WPRIM (Pacifique occidental) Sujet Principal: Traitement d'image par ordinateur / Amélioration d'image / Échographie / Imagerie tridimensionnelle / Méthodes Type d'étude: Etude diagnostique langue: Chinois Texte intégral: Journal of Biomedical Engineering Année: 2006 Type: Article