Department of Electronic and Electrical Engineering, the Southern University of Science and Technology, Shenzhen, 518055, China.
Department of Electronic Engineering, The Chinese University of Hong Kong, Hong Kong, 999077, China.
Curr Med Sci. 2021 Dec;41(6):1151-1157. doi: 10.1007/s11596-021-2482-3. Epub 2021 Dec 14.
This paper proposes a new photoacoustic computed tomography (PACT) imaging system employing dual ultrasonic transducers with different frequencies. When imaging complex biological tissues, photoacoustic (PA) signals with multiple frequencies are produced simultaneously; however, due to the limited bandwidth of a single-frequency transducer, the received PA signals with specific frequencies may be missing, leading to a low imaging quality.
In contrast to our previous work, the proposed system has a compact volume as well as specific selection of the detection center frequency of the transducer, which can provide a comprehensive range for the detection of PA signals. In this study, a series of numerical simulation and phantom experiments were performed to validate the efficacy of the developed PACT system.
The images generated by our system combined the advantages of both high resolution and ideal brightness/contrast.
The interchangeability of transducers with different frequencies provides potential for clinical deployment under the circumstance where a single frequency transducer cannot perform well.
本文提出了一种采用双不同频率超声换能器的新型光声计算机断层成像（PACT）系统。在对复杂生物组织进行成像时，会同时产生具有多个频率的光声（PA）信号；然而，由于单个频率换能器的带宽有限，可能会错过具有特定频率的接收 PA 信号，从而导致成像质量降低。
与我们之前的工作相比，所提出的系统具有紧凑的体积以及对换能器检测中心频率的特定选择，这可以为 PA 信号的检测提供全面的范围。在这项研究中，进行了一系列数值模拟和体模实验，以验证所开发的 PACT 系统的功效。
我们的系统生成的图像结合了高分辨率和理想的亮度/对比度的优势。
不同频率换能器的可互换性为在单个频率换能器表现不佳的情况下提供了临床部署的潜力。
