应用光学, 2011, 32 (5): 831, 网络出版: 2011-11-18
探测器频带对光声成像分辨率的影响研究
Influence of transducer bandwidth on photo-acoustic imaging resolution
医用光学与生物技术 光声成像 分辨率 不同探测器频带 medical optics and biotechnology photo-acoustic imaging resolution different bandwidths of transducer
摘要
为了研究探测器频带对光声成像分辨率的影响,采用有限元仿真实验,得出不同探测器频带与分辨率之间的经验公式,即对于mm量级的吸收体,探测器的截止频率大于2 MHz时,重建图像分辨率变化不明显,当探测器的截止频率小于2 MHz时,分辨率降低非常明显。该研究结果对光声成像探测器的选择、成像效果评估具有参考价值。
Abstract
In order to research the influence of different bandwidths of transducer on photo-acoustic imaging resolution, finite element simulation experiments were carried out. An empirical formula was obtained between transducer bandwidth and photo-acoustic imaging resolution. Experimental results showed that the reconstructed image resolution of absorbers was unchanged in the order of millimeters when the cut-off frequency of transducer was greater than 2 MHz; however, it was contrary for the frequency less than 2 MHz. The results are helpful for the choice of transducer and the evaluation of image reconstruction.
谭毅, 黄新民, 任亚杰. 探测器频带对光声成像分辨率的影响研究[J]. 应用光学, 2011, 32(5): 831. TAN Yi, HUANG Xin-min, REN Ya-jie. Influence of transducer bandwidth on photo-acoustic imaging resolution[J]. Journal of Applied Optics, 2011, 32(5): 831.