Tissue ultrasound imaging based on wavelet correlation analysis and pulse-inversion technique.
Technol Health Care
; 32(1): 31-53, 2024.
Article
em En
| MEDLINE
| ID: mdl-37781821
ABSTRACT
BACKGROUND:
Pulse-inversion-based tissue harmonic imaging has been utilized for many years because it can effectively eliminate the harmonic leakage and produce low side-lobe. However, the pulse inversion method is sensitive to imaging object movements, which may result in motion artifacts. Spatial resolution and contrast were limited.OBJECTIVE:
To improve ultrasound image quality by a new pulse-inversion-based tissue harmonic imaging technique.METHODS:
Continuous wavelet transform is applied to investigate the correlation between mother wavelet and the received echoes from two opposite pulses. To get a better correlation, a novel mother wavelet named 'tissue wavelet' is designed based on the Khokhlov-Zabolotskaya- Kuznetsov (KZK) wave equation. Radio frequency data were obtained from open Ultrasonix SonixTouch imaging system. Experiments were carried on ultrasonic tissue phantom, human carotid artery and human liver.RESULTS:
The average improvement of lateral spatial resolution is 49.52% compared to pulse-inversion-based tissue second-harmonic Imaging (PIHI). Contrast ratio (CR) and contrast-to-noise ratio (CNR) increased by 5.55 dB and 1.40 dB over PIHI. Tissue wavelet performs better than Mexh and Morl wavelet in lateral spatial resolution, CR, and CNR.CONCLUSION:
The proposed technique effectively improves the imaging quality in lateral spatial resolution, CR, and CNR.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Análise de Ondaletas
/
Fígado
Limite:
Humans
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article