Ellwood Robert, Zhang Edward, Beard Paul, Cox Ben
J Biomed Opt. 2014 Dec;19(12):126012. doi: 10.1117/1.JBO.19.12.126012.
Planar sensor arrays have advantages when used for photoacoustic imaging: they do not require the imaging target to be enclosed, and they are easier to manufacture than curved arrays. However, planar arrays have a limited view of the acoustic field due to their finite size; therefore, not all of the acoustic waves emitted from a photoacoustic source can be recorded. This loss of data results in artifacts in the reconstructed photoacoustic image. A detection array configuration which combines a planar Fabry–Pérot sensor with perpendicular acoustic reflectors is described and experimentally implemented. This retains the detection advantages of the planar sensor while increasing the effective detection aperture in order to improve the reconstructed photoacoustic image.
它们不需要将成像目标封闭起来，而且比曲面阵列更容易制造。然而，由于平面阵列尺寸有限，其对声场的视野受限；因此，并非光声源发出的所有声波都能被记录下来。这种数据丢失会导致重建的光声图像中出现伪影。本文描述并通过实验实现了一种将平面法布里-珀罗传感器与垂直声反射器相结合的检测阵列配置。这在保留平面传感器检测优势的同时增加了有效检测孔径，以改善重建的光声图像。
