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Harmonic Golay coded excitation based on harmonic quadrature demodulation method.

Sang-Min Kim¹, Jae-Hee Song, Tai-Kyong Song

¹Department of Electronic Engineering, Sogang University, C.P.O BOX 1142, Seoul, Korea.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|January 24, 2009

Summary

This study introduces a novel method to double the frame rate of harmonic Golay coded excitation in ultrasound imaging. The technique enhances efficiency without compromising image quality, benefiting medical diagnostics.

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Area of Science:

Ultrasound imaging
Medical physics
Signal processing

Background:

Harmonic coded excitation increases signal-to-noise ratio (SNR) in harmonic imaging.
Conventional Harmonic Golay coded excitation (HGCE) uses four cycles per scan line, limiting frame rates.
Existing methods struggle to balance frame rate and image quality.

Purpose of the Study:

To develop a method for increasing the frame rate of HGCE.
To maintain or improve image quality while increasing frame rate.
To address the limitations of current HGCE techniques.

Main Methods:

Proposed a new method using two transmit-receive cycles with Quadrature Phase Shift Keying (QPSK) codes.
Employed harmonic quadrature demodulation to extract only the compressed second harmonic component.
Validated the method through mathematical analysis and MATLAB simulations.

Main Results:

The proposed method achieves a doubled frame rate compared to existing HGCE.
Image quality is maintained without significant deterioration.
Mathematical analysis and simulation showed a limited error of -52.08dB compared to the ideal case.

Conclusions:

The novel HGCE method effectively increases frame rates.
This advancement offers improved efficiency in harmonic ultrasound imaging.
The technique shows potential for enhanced diagnostic capabilities.