Synthetic Aperture Composite Focusing for High Framerate Medical Ultrasound Imaging
Konferenz: EUSAR 2012 - 9th European Conference on Synthetic Aperture Radar
23.04.2012 - 26.04.2012 in Nuremberg, Germany
Tagungsband: EUSAR 2012
Seiten: 4Sprache: EnglischTyp: PDFPersönliche VDE-Mitglieder erhalten auf diesen Artikel 10% Rabatt
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.