Synthetic Aperture Composite Focusing for High Framerate Medical Ultrasound Imaging

Conference: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
04/23/2012 - 04/26/2012 at Nuremberg, Germany

Proceedings: EUSAR 2012

Pages: 4Language: englishTyp: PDF

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Austeng, Andreas; Holm, Sverre (Department of Informatics, University of Oslo, P.O.Box 1080, Blindern, NO-0316 Oslo, Norway)

Abdominal medical ultrasound suffers from a low frame rate due to the acquisition of several sub-images at individual transmission focal points. Here a synthetic aperture method with prefocused sub-apertures is analyzed which instead of stitching Ns 2 transmit zones together for composite focusing, uses Ns prefocused sub-apertures to achieve close to dynamic focus. A frame rate increase of Ns 2 /2 is achieved. The proposed method is robust to motion artifacts and suitable for second harmonic imaging. Simulated RF-data from point targets and tissue-mimicking phantoms has been processed to evaluate the proposed method.