| Title: |
All-Optical Rotational Ultrasound Imaging |
| Authors: |
Colchester, Richard J.; Little, Callum; Dwyer, George; Noimark, Sacha; Alles, Erwin J.; Zhang, Edward Z.; Loder, Christopher D.; Parkin, Ivan P.; Papakonstantinou, Ioannis; Beard, Paul C.; Finlay, Malcolm C.; Rakhit, Roby D.; Desjardins, Adrien E. |
| Source: |
Scientific Reports ; volume 9, issue 1 ; ISSN 2045-2322 |
| Publisher Information: |
Springer Science and Business Media LLC |
| Publication Year: |
2019 |
| Description: |
Miniaturised high-resolution imaging devices are valuable for guiding minimally invasive procedures such as vascular stent placements. Here, we present all-optical rotational B-mode pulse-echo ultrasound imaging. With this device, ultrasound transmission and reception are performed with light. The all-optical transducer in the probe comprised an optical fibre that delivered pulsed excitation light to an optical head at the distal end with a multi-walled carbon nanotube and polydimethylsiloxane composite coating. This coating was photoacoustically excited to generate a highly directional ultrasound beam perpendicular to the optical fibre axis. A concave Fabry-Pérot cavity at the distal end of an optical fibre, which was interrogated with a tuneable continuous-wave laser, served as an omnidirectional ultrasound receiver. The transmitted ultrasound had a −6 dB bandwidth of 31.3 MHz and a peak-to-peak pressure of 1.87 MPa, as measured at 1.5 mm from the probe. The receiver had a noise equivalent pressure |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| DOI: |
10.1038/s41598-019-41970-z |
| Availability: |
https://doi.org/10.1038/s41598-019-41970-z; https://www.nature.com/articles/s41598-019-41970-z.pdf; https://www.nature.com/articles/s41598-019-41970-z |
| Rights: |
https://creativecommons.org/licenses/by/4.0 ; https://creativecommons.org/licenses/by/4.0 |
| Accession Number: |
edsbas.157EC97 |
| Database: |
BASE |