Abstract
Quasi-static elastography is an ultrasound method which is widely used to assess displacements and strain in tissue by correlating ultrasound data at different levels of deformation. Ultrafast plane-wave imaging allows us to obtain ultrasound data at frame rates over 10 kHz, permitting the quantification and visualization of fast deformations. Currently, mainly three beam-forming strategies are used to reconstruct radio frequency (RF) data from plane-wave acquisitions: delay-and-sum (DaS), and Lu's-fk and Stolt's-fk operating in the temporal-spatial and Fourier spaces, respectively. However, the effect of these strategies on elastography is unknown. This study investigates the effect of these beam-forming strategies on the accuracy of displacement estimation in four transducers (L7-4, 12L4VF, L12-5, MS250) for various reconstruction line densities and apodization/filtering settings. A method was developed to assess the accuracy experimentally using displacement gradients obtained in a rotating phantom. A line density with multiple lines per pitch resulted in increased accuracy compared to one line per pitch for all transducers and strategies. The impact on displacement accuracy of apodization/filtering varied per transducer. Overall, Lu's-fk beam-forming resulted in the most accurate displacement estimates. Although DaS in some cases provided similar results, Lu's-fk is more computationally efficient, leading to the conclusion that Lu's-fk is most optimal for plane wave ultrasound-based elastography.
| Original language | English |
|---|---|
| Article number | 319 |
| Number of pages | 16 |
| Journal | Applied Sciences (Switzerland) |
| Volume | 8 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 26 Feb 2018 |
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Keywords
- quasi-static
- elastography
- ultrasound
- beam-forming
- delay-and-sum
- Stolt's
- Lu's
- displacements
- apodization
- lateral displacement
- axial displacement
Cite this
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Quasi-static elastography and ultrasound plane-wave imaging : The effect of beam-forming strategies on the accuracy of displacement estimations. / Hendriks, Gijs A.G.M. (Corresponding Author); Chen, Chuan; Hansen, Hendrik H.G.; de Korte, Chris L.
In: Applied Sciences (Switzerland), Vol. 8, No. 3, 319, 26.02.2018.Research output: Contribution to journal › Article › Academic › peer-review
TY - JOUR
T1 - Quasi-static elastography and ultrasound plane-wave imaging
T2 - The effect of beam-forming strategies on the accuracy of displacement estimations
AU - Hendriks, Gijs A.G.M.
AU - Chen, Chuan
AU - Hansen, Hendrik H.G.
AU - de Korte, Chris L.
PY - 2018/2/26
Y1 - 2018/2/26
N2 - Quasi-static elastography is an ultrasound method which is widely used to assess displacements and strain in tissue by correlating ultrasound data at different levels of deformation. Ultrafast plane-wave imaging allows us to obtain ultrasound data at frame rates over 10 kHz, permitting the quantification and visualization of fast deformations. Currently, mainly three beam-forming strategies are used to reconstruct radio frequency (RF) data from plane-wave acquisitions: delay-and-sum (DaS), and Lu's-fk and Stolt's-fk operating in the temporal-spatial and Fourier spaces, respectively. However, the effect of these strategies on elastography is unknown. This study investigates the effect of these beam-forming strategies on the accuracy of displacement estimation in four transducers (L7-4, 12L4VF, L12-5, MS250) for various reconstruction line densities and apodization/filtering settings. A method was developed to assess the accuracy experimentally using displacement gradients obtained in a rotating phantom. A line density with multiple lines per pitch resulted in increased accuracy compared to one line per pitch for all transducers and strategies. The impact on displacement accuracy of apodization/filtering varied per transducer. Overall, Lu's-fk beam-forming resulted in the most accurate displacement estimates. Although DaS in some cases provided similar results, Lu's-fk is more computationally efficient, leading to the conclusion that Lu's-fk is most optimal for plane wave ultrasound-based elastography.
AB - Quasi-static elastography is an ultrasound method which is widely used to assess displacements and strain in tissue by correlating ultrasound data at different levels of deformation. Ultrafast plane-wave imaging allows us to obtain ultrasound data at frame rates over 10 kHz, permitting the quantification and visualization of fast deformations. Currently, mainly three beam-forming strategies are used to reconstruct radio frequency (RF) data from plane-wave acquisitions: delay-and-sum (DaS), and Lu's-fk and Stolt's-fk operating in the temporal-spatial and Fourier spaces, respectively. However, the effect of these strategies on elastography is unknown. This study investigates the effect of these beam-forming strategies on the accuracy of displacement estimation in four transducers (L7-4, 12L4VF, L12-5, MS250) for various reconstruction line densities and apodization/filtering settings. A method was developed to assess the accuracy experimentally using displacement gradients obtained in a rotating phantom. A line density with multiple lines per pitch resulted in increased accuracy compared to one line per pitch for all transducers and strategies. The impact on displacement accuracy of apodization/filtering varied per transducer. Overall, Lu's-fk beam-forming resulted in the most accurate displacement estimates. Although DaS in some cases provided similar results, Lu's-fk is more computationally efficient, leading to the conclusion that Lu's-fk is most optimal for plane wave ultrasound-based elastography.
KW - quasi-static
KW - elastography
KW - ultrasound
KW - beam-forming
KW - delay-and-sum
KW - Stolt's
KW - Lu's
KW - displacements
KW - apodization
KW - lateral displacement
KW - axial displacement
UR - http://www.scopus.com/inward/record.url?scp=85042561734&partnerID=8YFLogxK
U2 - 10.3390/app8030319
DO - 10.3390/app8030319
M3 - Article
VL - 8
JO - Applied Sciences (Switzerland)
JF - Applied Sciences (Switzerland)
SN - 2076-3417
IS - 3
M1 - 319
ER -