| 1. | M. Roberts; E. Martin; M. D. Brown; B. T. Cox; B. E. Treeby open-UST: An Open-Source Ultrasound Tomography Transducer Array System Journal Article In: IEEE Transactions of Ultrasonics, Ferroelectrics, and Frequency Control, 70 (7), pp. 782-791, 2023. Links | BibTeX @article{2023-Roberts-IEEETUFFC,
title = {open-UST: An Open-Source Ultrasound Tomography Transducer Array System},
author = {M. Roberts and E. Martin and M. D. Brown and B. T. Cox and B. E. Treeby},
url = {http://bug.medphys.ucl.ac.uk/papers/2023-Roberts-IEEETUFFC.pdf},
doi = {10.1109/TUFFC.2023.3280635},
year = {2023},
date = {2023-05-31},
journal = {IEEE Transactions of Ultrasonics, Ferroelectrics, and Frequency Control},
volume = {70},
number = {7},
pages = {782-791},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 2. | M. D. Brown; B. T. Cox; B. E. Treeby Binary volume acoustic holograms Journal Article In: Physical Review Applied, 19 , pp. 044032, 2023. Abstract | Links | BibTeX @article{2023-Brown-PRA.pdf,
title = {Binary volume acoustic holograms},
author = {M. D. Brown and B. T. Cox and B. E. Treeby},
url = {http://bug.medphys.ucl.ac.uk/papers/2023-Brown-PRA.pdf},
doi = {10.1103/PhysRevApplied.19.044032},
year = {2023},
date = {2023-04-11},
journal = {Physical Review Applied},
volume = {19},
pages = {044032},
abstract = {In recent years, high-resolution additive manufacturing has enabled a diverse range of low-cost methods for ultrasonic wave-front shaping. Acoustic holograms, in particular, allow for the generation of arbitrary diffraction-limited acoustic fields at megahertz frequencies from single-element transducers. These are phase plates that function as direct acoustic analogs to thin optical holograms. In this work, it is shown that, by using multiple polymer three-dimensional (3D) printing, two-material (binary) acoustic analogs to “thick” or volume optical holograms can also be generated. First, an analytic approach for designing a volume hologram that diffracts a set of input fields onto a desired set of output fields is briefly summarized. Next, a greedy-optimization approach based on random downhill binary search able to account for the constraints imposed by the chosen fabrication method is introduced. Finally, an experimental test case designed to diffract the field generated by a 2.54-cm planar lead zirconate titanate (PZT) transducer onto eight distinct patterns dependent on the direction of the incident field is used to validate the approach and the design method. Field scans of the eight target fields demonstrate that acoustic analogs of optical volume holograms can be generated using multipolymer printing and that these allow the multiplexing of distinct fields onto different incident field directions.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In recent years, high-resolution additive manufacturing has enabled a diverse range of low-cost methods for ultrasonic wave-front shaping. Acoustic holograms, in particular, allow for the generation of arbitrary diffraction-limited acoustic fields at megahertz frequencies from single-element transducers. These are phase plates that function as direct acoustic analogs to thin optical holograms. In this work, it is shown that, by using multiple polymer three-dimensional (3D) printing, two-material (binary) acoustic analogs to “thick” or volume optical holograms can also be generated. First, an analytic approach for designing a volume hologram that diffracts a set of input fields onto a desired set of output fields is briefly summarized. Next, a greedy-optimization approach based on random downhill binary search able to account for the constraints imposed by the chosen fabrication method is introduced. Finally, an experimental test case designed to diffract the field generated by a 2.54-cm planar lead zirconate titanate (PZT) transducer onto eight distinct patterns dependent on the direction of the incident field is used to validate the approach and the design method. Field scans of the eight target fields demonstrate that acoustic analogs of optical volume holograms can be generated using multipolymer printing and that these allow the multiplexing of distinct fields onto different incident field directions. |
| 3. | M. Bakaric; P. Miloro; A. Javaherian; B. T. Cox; B. E. Treeby; M. D. Brown Measurement of the ultrasound attenuation and dispersion in 3D-printed photopolymer materials from 1 to 3.5 MHz Journal Article In: J. Acoust. Soc. Am., 150 (4), pp. 2798-2805, 2021. Links | BibTeX @article{2021-Bakaric-JASA,
title = {Measurement of the ultrasound attenuation and dispersion in 3D-printed photopolymer materials from 1 to 3.5 MHz},
author = {M. Bakaric and P. Miloro and A. Javaherian and B. T. Cox and B. E. Treeby and M. D. Brown},
url = {http://bug.medphys.ucl.ac.uk/papers/2021-Bakaric-JASA.pdf},
doi = {10.1121/10.0006668},
year = {2021},
date = {2021-10-14},
journal = {J. Acoust. Soc. Am.},
volume = {150},
number = {4},
pages = {2798-2805},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 4. | M. D. Brown; B. T. Cox; B. E. Treeby Stackable acoustic holograms Journal Article In: Appl. Phys. Lett., 116 , pp. 261901, 2020. Links | BibTeX @article{2020-Brown-APL,
title = {Stackable acoustic holograms},
author = {M. D. Brown and B. T. Cox and B. E. Treeby},
url = {http://bug.medphys.ucl.ac.uk/papers/2020-Brown-APL.pdf},
doi = {10.1063/5.0009829},
year = {2020},
date = {2020-06-29},
journal = {Appl. Phys. Lett.},
volume = {116},
pages = {261901},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 5. | M. D. Brown Phase and amplitude modulation with acoustic holograms Journal Article In: Appl. Phys. Lett., 115 , pp. 053701, 2019. Links | BibTeX @article{2019-Brown-APL,
title = {Phase and amplitude modulation with acoustic holograms},
author = {M. D. Brown},
url = {http://bug.medphys.ucl.ac.uk/papers/2019-Brown-APL.pdf},
doi = {10.1063/1.5110673},
year = {2019},
date = {2019-07-29},
journal = {Appl. Phys. Lett.},
volume = {115},
pages = {053701},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 6. | M. D. Brown; E. Z. Zhang; B. E. Treeby; P. C. Beard; B. T. Cox Reverberant cavity photoacoustic imaging Journal Article In: Optica, 6 (6), pp. 821-822, 2019. Links | BibTeX @article{2019-Brown-OPTICA,
title = {Reverberant cavity photoacoustic imaging},
author = {M. D. Brown and E. Z. Zhang and B. E. Treeby and P. C. Beard and B. T. Cox},
url = {http://bug.medphys.ucl.ac.uk/papers/2019-Brown-OPTICA.pdf},
doi = {10.1364/OPTICA.6.000821},
year = {2019},
date = {2019-06-19},
journal = {Optica},
volume = {6},
number = {6},
pages = {821-822},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 7. | M. D. Brown; B. T. Cox; B. E. Treeby Design of multi-frequency acoustic kinoforms Journal Article In: Appl. Phys. Lett., 111 (24), pp. 244101, 2017. Links | BibTeX @article{Brown2017b,
title = {Design of multi-frequency acoustic kinoforms},
author = {M. D. Brown and B. T. Cox and B. E. Treeby},
url = {http://bug.medphys.ucl.ac.uk/papers/2017-Brown-APL-2.pdf},
doi = {10.1063/1.5004040},
year = {2017},
date = {2017-12-11},
journal = { Appl. Phys. Lett.},
volume = {111},
number = {24},
pages = {244101},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 8. | M. D. Brown; D. I. Nikitichev; B. E. Treeby; B. T. Cox Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles Journal Article In: Appl. Phys. Lett., 110 (9), pp. 094102, 2017. Links | BibTeX @article{Brown2017,
title = {Generating arbitrary ultrasound fields with tailored optoacoustic surface profiles},
author = {M. D. Brown and D. I. Nikitichev and B. E. Treeby and B. T. Cox},
url = {http://bug.medphys.ucl.ac.uk/papers/2017-Brown-APL.pdf},
doi = {10.1063/1.4976942},
year = {2017},
date = {2017-02-28},
journal = {Appl. Phys. Lett.},
volume = {110},
number = {9},
pages = {094102},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
| 9. | M. D. Brown; J. Jaros; B. T. Cox; B. E. Treeby Control of broadband optically generated ultrasound pulses using binary amplitude holograms Journal Article In: J. Acoust. Soc. Am., 139 (4), pp. 1637–1467, 2016. Links | BibTeX @article{Brown2016,
title = {Control of broadband optically generated ultrasound pulses using binary amplitude holograms},
author = {M. D. Brown and J. Jaros and B. T. Cox and B. E. Treeby},
url = {http://bug.medphys.ucl.ac.uk/papers/2016-Brown-JASA.pdf},
doi = {10.1121/1.4944758},
year = {2016},
date = {2016-04-06},
journal = {J. Acoust. Soc. Am.},
volume = {139},
number = {4},
pages = {1637--1467},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
|
