A Real-Time Dual-Mode High-Frequency Beamformer for Ultrafast and Focused Imaging

被引：3
|
作者：
Campbell, Nicholas A. [1 ]
Brown, Jeremy A. [1 ,2 ]
机构：
[1] Dalhousie Univ, Sch Biomed Engn, Halifax, NS B3H 4R2, Canada
[2] Dalhousie Univ, Dept Elect & Comp Engn, Halifax, NS B3H 4R2, Canada
来源：
IEEE TRANSACTIONS ON ULTRASONICS FERROELECTRICS AND FREQUENCY CONTROL | 2022年 / 69卷 / 04期
基金：
欧洲研究理事会;
关键词：
Imaging; Spatial resolution; Array signal processing; Transducers; Ultrasonic imaging; Real-time systems; Image resolution; Beamforming; delta encoding; diverging wave; focused imaging (FI); high frequency; ultrafast (UF) ultrasound imaging; DOPPLER;
D O I：
10.1109/TUFFC.2022.3151218
中图分类号：
O42 [声学];
学科分类号：
070206 ; 082403 ;
摘要：
A firmware-based high-frequency beam- former implementing both conventional transmit focused B-mode imaging and diverging wave ultrafast (UF) imaging for Doppler overlay was developed. The beamformer can generate one transmit focused frame with four transmit focal zones (FZs), and 68 UF frames with 16 diverging waves each at a 10-Hz frame rate. The beamformer firmware stores the beamforming delays as a single bit, enabling efficient compression within the internal memory. The beamformer was characterized using a 30-MHz 64-element phased array endoscope. The hybrid system generates a 128 line by 768-pixel focused B-mode image spanning 1.2-12.6 mm axially over a +/- 32 degrees range of steering angles. In addition, the system generates an UF image that is 64 lines by 384-pixels spanning 3.5-10.8 mm axially over a +/- 16 degrees angle.
引用
收藏
页码：1268 / 1276
页数：9
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