Conference paper
Image Quality Degradation from Transmit Delay Profile Quantization
The investigated hypothesis is that quantization of the transmit delay profiles degrades the image quality in plane wave ultrasound imaging. Simulated point spread functions show that transmit delay profile quantization gives rise to artefacts behind the point target. The axial and lateral 6 dB resolution is unaffected, but contrast is reduced.
This is quantified by a 20 dB cystic resolution of 1.23 mm compared to 0.53 mm for the ideal (non-quantized) case at 10 mm depth. It is also shown that providing individually phase-shifted excitation waveforms to each element restores the image quality, as seen by the 20 dB cystic resolution being restored to 0.53 mm.
The impact on high-quality imaging is discussed.
Language: | English |
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Publisher: | IEEE |
Year: | 2015 |
Pages: | 1-4 |
Proceedings: | 2015 IEEE International Ultrasonics Symposium |
ISBN: | 1479981818 , 1479981826 , 1479981834 , 9781479981816 , 9781479981823 and 9781479981830 |
Types: | Conference paper |
DOI: | 10.1109/ULTSYM.2015.0126 |
ORCIDs: | Stuart, Matthias Bo , Jensen, Jonas , di Ianni, Tommaso and Jensen, Jørgen Arendt |
Apertures Arrays Delays Image quality Imaging Quantization (signal) Ultrasonic imaging artefacts axial resolution depth 10 mm image quality degradation image resolution individually phase-shifted excitation waveforms lateral resolution optical transfer function plane wave ultrasound imaging point spread functions transmit delay profile quantization ultrasonic imaging