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Continuous wave ultrasonic Doppler tomography

Haidong-Dong Liang

Haidong-Dong Liang

Department of Medical Physics and Bioengineering, University Hospitals Bristol NHS Foundation Trust, Bristol General Hospital, Bristol BS1 6SY, UK

School of Engineering, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, UK

[email protected]

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Chun Sing Louis Tsui

Chun Sing Louis Tsui

Department of Medical Physics and Bioengineering, University Hospitals Bristol NHS Foundation Trust, Bristol General Hospital, Bristol BS1 6SY, UK

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Michael Halliwell

Michael Halliwell

Department of Medical Physics and Bioengineering, University Hospitals Bristol NHS Foundation Trust, Bristol General Hospital, Bristol BS1 6SY, UK

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Peter N. T. Wells

Peter N. T. Wells

School of Engineering, Cardiff University, Queen's Buildings, The Parade, Cardiff CF24 3AA, UK

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    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.

    Footnotes

    One contribution of 15 to a Theme Issue ‘Recent advances in biomedical ultrasonic imaging techniques’.

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