Abstract：
One of the primary challenges in ring single-element photoacoustic tomography systems is the low image quality in areas away from the center of the ring. This is mainly due to the limited field of view (FOV) of each transducer, which in turn reduces the imaging FOV. To address this shortcoming, we have put forward a practical and straightforward solution to enhance the FOV of circular scanning-based photoacoustic tomography (CS-PAT). This is accomplished by placing transducers at different angles instead of using a single transducer placed at a normal angle to the imaging target. We also modified the ring scanner inner wall surface to significantly reduce photoacoustic reverberation. By imaging several phantoms, we show a significant improvement in the images generated by our system imaging from 4.1 to over 7 for the signal-to-noise ratio and structural similarity index increased from 41% to 70%.
摘要：
环形单元素光声层析成像系统中的主要挑战之一是远离环形中心的区域中的低图像质量。这主要是由于每个换能器的视场（FOV）有限，这又降低了成像FOV。为了解决这个缺点，我们提出了一种实用且简单的解决方案来增强基于圆形扫描的光声层析成像（CS-PAT）的视场。这通过以不同角度放置换能器而不是使用以相对于成像目标的法向角放置的单个换能器来实现。我们还修改了环形扫描仪内壁表面，以显着减少光声混响。通过成像几个幻影，对于信噪比和结构相似性指数从41％增加到70％，我们的系统成像生成的图像从4.1到7的显着改善。
