| Title |
A model of ultrasound contrast agent for blood flow investigation at higher harmonics / |
| Another Title |
Ultragarsinės kontrastinės medžiagos modelis kraujo srauto tyrimams aukštesnėse harmonikose. |
| Authors |
Burba, T |
| Full Text |
|
| Is Part of |
Elektronika ir elektrotechnika.. Kaunas : Technologija. 2006, Nr. 8, p. 79-82.. ISSN 1392-1215. eISSN 2029-5731 |
| Abstract [eng] |
Primary radiation force subjects contrast agent particles to movement which can yield wrong Doppler shift. A known model of this movement is extended to include bubble oscillations. This allows to predict full spectrum of the returned signal, hence the model is useful for second-harmonic imaging. Analytical method to calculate steady-state velocity from parameters like bubble diameter, ultrasound pressure and frequency is provided; some simulation peculiarities are explained. Trajectory and response of a single bubble for two different Doppler angles were simulated using Matlab. A resonant bubble carried by 10 cm/s water flow exhibits almost no Doppler shift if irradiated forward flow by 46 kPa CW ultrasound. A drawback of the model - very long simulation time. |
| Published |
Kaunas : Technologija |
| Type |
Journal article |
| Language |
English |
| Publication date |
2006 |
| CC license |
|
