Plane wave perfusion ultrasound imaging without contrast
| Autor: | Brett Byram, Jaime Tierney, Crystal L. Coolbaugh, Theodore F. Towse |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
genetic structures business.industry Plane wave Perfusion scanning Blood flow Frame rate 01 natural sciences 030218 nuclear medicine & medical imaging 03 medical and health sciences symbols.namesake 0302 clinical medicine Optics 0103 physical sciences symbols Demodulation Clutter Sensitivity (control systems) business 010301 acoustics Doppler effect Biomedical engineering |
| Zdroj: | 2016 IEEE International Ultrasonics Symposium (IUS). |
| Popis: | Perfusion imaging with conventional Doppler ultrasound is difficult due to frame rate and tissue clutter limitations. Consequently, conventional methods are only sensitive to velocities above 5–10mm/s for typical clinical imaging frequencies. To overcome this limitation and simultaneously address the frame rate and tissue clutter problems, we propose a technique that uses plane wave sequencing and an adaptive tissue clutter frequency and amplitude demodulation scheme. Suppression of tissue clutter due to sonographer hand motion was tested using phantoms and showed potential for increased Doppler sensitivity to at least as low as 1.17mm/s. Additionally, feasibility of the method is demonstrated in vivo using muscle contractions of a human calf, which resulted in 2.54dB and 0.12dB dynamic ranges of blood flow through slow-time for the proposed and conventional methods, respectively. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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