Publication: Research - peer-review › Article in proceedings – Annual report year: 2011
In this paper results from a non-linear AS (angular spectrum) based ultrasound simulation program are compared to water-tank measurements. A circular concave transducer with a diameter of 1 inch (25.4 mm) is used as the emitting source. The measured pulses are rst compared with the linear simulation program Field II, which will be used to generate the source for the AS simulation. The generated non-linear ultrasound eld is measured by a hydrophone in the focal plane. The second harmonic component from the measurement is compared with the AS simulation, which is used to calculate both fundamental and second harmonic elds. The focused piston transducer with a center frequency of 5 MHz is excited by a waveform generator emitting a 6-cycle sine wave. The hydrophone is mounted in the focal plane 118 mm from the transducer. The point spread functions at the focal depth from Field II and measurements are illustrated. The FWHM (full width at half maximum) values are 1.96 mm for the measurement and 1.84 mm for the Field II simulation. The fundamental and second harmonic components of the experimental results are plotted compared with the AS simulations. The RMS (root mean square) errors of the AS simulations are 7.19% and 10.3% compared with the fundamental and second harmonic components of the measurements.
|Title||Proceedings of SPIE|
|Editors||Jan D'hooge, Marvin M. Doyley|
|Publisher||SPIE - International Society for Optical Engineering|
|Conference||SPIE Medical Imaging : Ultrasonic Imaging, Tomography, and Therapy|
|City||Lake Buena Vista, Florida, United States|
|Period||01/01/11 → …|
Article Number: 79680P
|Citations||Web of Science® Times Cited: 2|
- Concave transducer, Water-tank measurement, Non-linear ultrasound simulation, Angular spectrum
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