Ultrasonography and photoacoustic tomography provide complementary contrasts in preclinical studies, disease diagnoses, and imaging-guided interventional procedures. Here, we present a video-rate (20 Hz) dual-modality ultrasound and photoacoustic tomographic platform that has a high resolution, rich contrasts, deep penetration, and wide field of view. A three-quarter ring-array ultrasonic transducer is used for both ultrasound and photoacoustic imaging. Plane-wave transmission/receiving approach is used for ultrasound imaging, which improves the imaging speed by nearly two folds and reduces the RF data size compared with the sequential single-channel scanning approach. GPU-based image reconstruction is developed to advance computational speed. We demonstrate fast dual-modality imaging in phantom, mouse, and human finger joint experiments. The results show respiration motion, heart beating, and detailed features in the mouse internal organs. To our knowledge, this is the first report on fast plane-wave ultrasound imaging and single-shot photoacoustic computed tomography in a ring-array system.

中文翻译：

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视频速率环形阵列超声和光声层析成像。

超声检查和光声层析成像在临床前研究，疾病诊断和影像学指导的介入程序中提供了互补的对比。在这里，我们介绍了一种具有高分辨率，丰富的对比度，深穿透力和宽视野的视频速率（20 Hz）双模态超声和光声层析成像平台。四分之三的环形阵列超声换能器用于超声成像和光声成像。平面波传输/接收方法用于超声成像，与顺序单通道扫描方法相比，其成像速度提高了近两倍，并减小了RF数据大小。开发基于GPU的图像重建以提高计算速度。我们展示了幻影，鼠标和人类手指关节实验中的快速双模态成像。结果显示了小鼠内脏器官的呼吸运动，心脏跳动和详细特征。据我们所知，这是环形阵列系统中有关快速平面波超声成像和单次光声计算机断层扫描的第一份报告。