Abstract
Clinical applications of plane wave imaging necessitate
the creation of high-quality images with the highest possible
frame rate for improved blood flow tracking and anatomical
imaging. However, linear array transducers create grating lobe
artefacts, which degrade the image quality especially in the
near field for λ-pitch transducers. Artefacts can only partly be
suppressed by increasing the number of emissions, and this paper
demonstrates how the frame rate can be increased without loss
of image quality by using λ/2-pitch transducers. The number
of emissions and steering angles are optimized in a simulation
study to get the best images with as high a frame rate as possible.
The optimal setup for a simulated 4.1 MHz λ-pitch transducer
is 73 emissions and a maximum steering of 22◦
. The achieved
FWHM is 1.3λ and the cystic resolution is -25 dB for a scatter
at 9 mm. Only 37 emissions are necessary within the same
angle range when using a λ/2-pitch transducer, and the cystic
resolution is reduced to -56 dB. Measurements are performed
with the experimental SARUS scanner connected to a λ-pitch and
λ/2-pitch transducer. A wire phantom and a tissue mimicking
phantom containing anechoic cysts are scanned and show the
performance using the optimized sequences for the transducers.
Measurements confirm results from simulations, and the λ-pitch
transducer show artefacts at undesirable strengths of -25 dB for
a low number of emissions.
Original language | English |
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Title of host publication | Proceedings of IEEE International Ultrasonics Symposium |
Number of pages | 4 |
Publisher | IEEE |
Publication date | 2015 |
ISBN (Print) | 9781479981823 |
DOIs | |
Publication status | Published - 2015 |
Event | 2015 IEEE International Ultrasonics Symposium - Taipei, Taiwan, Province of China Duration: 21 Oct 2015 → 24 Oct 2015 https://ieeexplore.ieee.org/xpl/conhome/7315052/proceeding |
Conference
Conference | 2015 IEEE International Ultrasonics Symposium |
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Country/Territory | Taiwan, Province of China |
City | Taipei |
Period | 21/10/2015 → 24/10/2015 |
Internet address |