MSc Defence: TISSUE THERMOMETRY USING SYNTHETIC TRANSMIT APERTURE ULTRASOUND IMAGING
- Date
- December 19, 2024
- Time
- 1:00 p.m. - 4:00 p.m. ET
- Location
- Zoom
- Open To
- Physics students, faculty members, adjuncts, post-docs, staff, guests
- Contact
- biomed@torontomu.ca
Student: Revin Toquero
Supervisors: Dr. Jahan Tavakkoli and Dr. Yuan Xu
Abstract
Ultrasound thermometry using changes in backscattered energy (CBE) with synthetic transmit aperture (STA) imaging techniques was tested for temperature linearity, calibrated for CBE-estimated temperature, and compared to standard B-mode thermometry. Ex vivo porcine tissue was locally heated with low intensity focused ultrasound (LIFU) and then naturally cooled. STA imaging techniques, specifically traditional compounding (TC) and decorrelated compounding (DC), were assessed with and without induced tissue motion and evaluated by the RMSE of the CBE-estimated temperature. In non-motion LIFU experiments, TC and DC reduced the RMSE by factors of 1.13 and 1.10, respectively, compared to standard B-mode thermometry during the heating phase. In motion-induced experiments, TC and DC achieved RMSE reductions of 1.54 and 1.12, respectively, during the heating phase.