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Updated: May 19, 2026

Blood Flow Imaging with Ultrafast Doppler
Published on: October 14, 2020
Continuous wave ultrasonic Doppler tomography
Haidong-Dong Liang1, Chun Sing Louis Tsui, Michael Halliwell
1Department of Medical Physics and Bioengineering , University Hospitals Bristol NHS Foundation Trust , Bristol General Hospital, Bristol BS1 6SY , UK.
Abstract:
In continuous wave ultrasonic Doppler tomography (DT), the ultrasonic beam moves relative to the scanned object to acquire Doppler-shifted frequency spectra which correspond to cross-range projections of the scattering and reflecting structures within the object. The relative motion can be circular or linear. These data are then backprojected to reconstruct the two-dimensional image of the object cross section. By using coherent processing, the spatial resolution of ultrasonic DT is close to an order of magnitude better than that of traditional pulse-echo imaging at the same ultrasound frequency.
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