Experimental Implementation of a Pulse Compression Technique Using Coherent Plane-Wave Compounding

The axial resolution of an ultrasound imaging system is inversely proportional to the bandwidth of the emitted signal. When conventional pulsing (CP) is used, the impulse response of the transducer and the excitation signal determine together the shape of the emitted pulse and its bandwidth. A way t...

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Vydáno v:IEEE transactions on ultrasonics, ferroelectrics, and frequency control Ročník 65; číslo 6; s. 1025 - 1036
Hlavní autoři: Benane, Yanis Mehdi, Bujoreanu, Denis, Lavarello, Roberto J., Varray, Francois, Escoffre, Jean-Michel, Novell, Anthony, Cachard, Christian, Basset, Olivier
Médium: Journal Article
Jazyk:angličtina
Vydáno: United States IEEE 01.06.2018
Institute of Electrical and Electronics Engineers
Témata:
Bandwidth
Bandwidth enhancement
Chirp
chirp excitation
Computer Science
Engineering Sciences
Imaging
Medical Imaging
plane-wave compounding
pulse compression
Signal and Image processing
Signal to noise ratio
Spatial resolution
ultrafast ultrasonic imaging
Ultrasonic imaging
Wiener filter
Index Terms-Bandwidth enhancement
pulse compression
reseauₙational
Imagerie Ultrasonore
chirp excitation
Wiener filter
plane-wave compounding
spatial resolution
ultrafast ultrasonic imaging
Labex CELYA
categₛt2i
ISSN:0885-3010, 1525-8955, 1525-8955
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Popis
Shrnutí:The axial resolution of an ultrasound imaging system is inversely proportional to the bandwidth of the emitted signal. When conventional pulsing (CP) is used, the impulse response of the transducer and the excitation signal determine together the shape of the emitted pulse and its bandwidth. A way to increase the ultrasound image resolution is to increase the transducer's limited passband. The resolution enhancement compression (REC) is a coding technique that boosts the signal energy in the transition frequency bands, where the energy transduction of the ultrasound probe is less efficient. Consequently, image quality metrics including axial resolution, signal-to-noise ratio (SNR), and contrast-to-noise ratio (CNR) can be improved. In this paper, the objective is to combine REC with coherent plane-wave compounding (CPWC) in order to achieve better image quality at an ultrafast acquisition rate. Promising results are obtained from both wire and cyst phantoms using an excitation signal designed to provide a 54% increase in bandwidth over the one obtained with a broadband pulse excitation at -6 dB. The experimental bandwidth measured from the backscattered echoes was improved by 49% for the wire phantom, when using the CPWC-REC technique compared to CPWC-CP. Furthermore, the axial resolution as derived from the modulation transfer function of the envelope of the wire target was enhanced by 29%. The CNR and SNR were improved up to 9 and up to 4 dB, respectively, in the cyst phantom. These results reveal that CPWC-REC is able to achieve higher spatial resolution, compared to CPWC-CP, with better SNR and CNR. Moreover, experimental results show that an effective implementation on a research scanner of REC using plane-wave imaging is possible. Consistent in vivo acquisition results on rabbit are presented and discussed.
Bibliografie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:0885-3010
1525-8955
1525-8955
DOI:10.1109/TUFFC.2018.2820747