Fast Super Resolution Ultrasound Imaging using the Erythrocytes

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Super resolution (SR) imaging is currently conducted using fragile ultrasound contrast agents. This precludes using the full acoustic pressure range, and the distribution of bubbles has to be sparse for them to be isolated for SR imaging. Images have to be acquired over minutes to accumulate enough positions for visualizing the vas- culature. A new method for SUper Resolution imaging using the Erythrocytes (SURE) as targets is introduced, which makes it possible to maximize the emitted pressure for good signal-to-noise ratios. The abundant number of erythrocyte targets make acquisition fast, and the SURE images can be acquired in seconds. A Verasonics Vantage 256 scanner was used in combination with a GE L8-18iD linear array probe operated at 10 MHz for a wavelength of 150 m. A 12 emissions synthetic aperture ultrasound sequence was employed to scan the kidney of a Sprague-Dawley rat for 24 seconds to visualize its vasculature. An ex vivo micro-CT image using the contrast agent Microfil was also acquired at a voxel size of 22.6 m for validating the SURE images. The SURE image revealed vessels with a size down to 29 fim, five times smaller than the ultrasound wavelength, and the dense grid of vessels in the full kidney was reliably shown for scan times between 1 to 24 seconds. Visually the SURE images revealed the same vasculature as the micro-CT images. SURE images are acquired in seconds rather than minutes without contrast injection for easy clinical use, and they can be measured at full regulatory levels for pressure, intensity, and probe temperature.

TitelMedical Imaging 2022 : Ultrasonic Imaging and Tomography
RedaktørerNick Bottenus, Nicole V. Ruiter
ISBN (Elektronisk)9781510649514
StatusUdgivet - 2022
BegivenhedMedical Imaging 2022: Ultrasonic Imaging and Tomography - Virtual, Online
Varighed: 21 mar. 202227 mar. 2022


KonferenceMedical Imaging 2022: Ultrasonic Imaging and Tomography
ByVirtual, Online
SponsorThe Society of Photo-Optical Instrumentation Engineers (SPIE)
NavnProgress in Biomedical Optics and Imaging - Proceedings of SPIE

Bibliografisk note

Funding Information:
The work is supported by European Research Council’s (ERC) Synergy Grant 854796.

Publisher Copyright:
© 2022 SPIE. All rights reserved.

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