A light-adjustable illumination scheme for hand-held probe for photoacoustic tomography is presented in this paper. The overall size of the probe is 120 × 60 × 40 mm 3 , which is easy to be held. Compared with traditional photoacoustic probe design, it has the following advantages: (1) Different excitation modes, that is, the different relative position between laser illumination area and ultrasonic detection area, can be selected as needed by tuning control parameters. (2) The spot-adjustable unit (SAU) specifically designed for beam expansion. (3) Angle Adjustment Unit (AAU) based on gear drive is proposed with single power input and bilateral output. Just by adjusting the motor parameters, the purpose of adjusting the incident angle can be precisely achieved. We built a PAT system based on our newly designed apparatus. Phantom and in vivo experimental results show that a variety of lighting schemes can be quickly generated according to requirements without changing the external settings, compared with the conventional probe.

中文翻译：

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用于体内光声断层扫描的可调光手持式探头


本文提出了一种用于光声层析成像的手持式探头的光可调照明方案。探头整体尺寸为120×60×40 mm 3 ，易于握持。与传统的光声探头设计相比，它具有以下优点：（1）可以根据需要通过调整控制参数来选择不同的激励模式，即激光照射区域与超声检测区域之间的不同相对位置。 (2)专为扩束设计的光斑可调单元(SAU)。 (3)提出了基于齿轮传动的角度调节单元(AAU)，具有单动力输入和双边输出。只需调整电机参数，即可精确达到调整入射角度的目的。我们基于新设计的设备构建了 PAT 系统。体模和活体实验结果表明，与传统探头相比，在不改变外部设置的情况下，可以根据需求快速生成多种照明方案。