Ultrasound Doppler Vector Tomography - Measurements of Directional Blood Flow

Summary, in English

An experimental system has been developed to verify the possibility of detecting flow activity using a technique called ultrasound Doppler vector tomography. A tomography algorithm is used to reconstruct blood flow vector fields using data from computer-controlled ultrasound continuous-wave Doppler scanning equipment. The result is a picture in which the brightness variations represent the reconstructed values of the curl of the velocity field (del x v). Continuous ultrasound is transmitted into a region with flow activity and the Doppler-shifted signals are received. To obtain measurement data suited for fan beam tomography, the scanning is performed in a plane from points encircling the region. Reconstructions have been achieved using measurement data from two different flow phantoms. A comparison between the experimental results and simulations shows good conformity. Copyright (C) 1997 World Federation for Ultrasound in Medicine & Biology.

• Författare: Tomas Jansson; Monica Almqvist; Kent Stråhlén; Roger Eriksson; Gunnar Sparr; Hans W Persson; Kjell Lindström
• Avdelning/ar: Medicinsk teknik, Lund; Avdelningen för Biomedicinsk teknik; Matematik LTH
• Publiceringsår: 1997
• Språk: Engelska
• Sidor: 47-57
• Publikation/Tidskrift/Serie: Ultrasound in Medicine and Biology
• Volym: 23
• Issue: 1
• Länkar: http://dx.doi.org/10.1016/S0301-5629(96)00185-8
• Dokumenttyp: Artikel i tidskrift
• Förlag: Elsevier
• Ämne: Radiology, Nuclear Medicine and Medical Imaging
• Nyckelord: ultrasound; Doppler; tomography; blood flow; vector fields; continuous wave; vorticity; curl
• Status: Published
• ISBN/ISSN/Övrigt: ISSN: 0301-5629