Abstract In this paper we present a system aimed at demonstrating the photoacoustic (PA) effect for educational purposes. PA imaging is a hybrid imaging modality that requires no contrast agent and has a great potential for spine and brain lesion characterisation, breast cancer and blood flow monitoring notably in the context of fetal surgery. It relies on combining light excitation with ultrasound reception. Our brief was to present and explain PA imaging in a public-friendly way suitable for a variety of ages and backgrounds. We developed a simple, accessible demonstration unit using readily available materials. We used a modulated light emitting diode (LED) torch and an electronic stethoscope. The output of a music player was used for light modulation and the chest piece of the stethoscope covered by a black tape was used as an absorbing target and an enclosed chamber. This demonstration unit was presented to the public at the Bloomsbury Festival On Light in October 2015. Our stall was visited by over 100 people of varying ages. Twenty families returned in-depth evaluation questionnaires, which show that our explanations of the photoacoustic effect were well understood. Their interest in biomedical engineering was increased.

中文翻译：

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音乐听诊器：光声效应的演示

摘要 在本文中，我们提出了一个旨在展示用于教育目的的光声 (PA) 效应的系统。PA 成像是一种不需要造影剂的混合成像模式，在脊柱和脑部病变表征、乳腺癌和血流监测方面具有巨大潜力，尤其是在胎儿手术的背景下。它依赖于将光激发与超声接收相结合。我们的简介是以适合各种年龄和背景的公众友好方式展示和解释 PA 成像。我们使用现成的材料开发了一个简单易用的演示单元。我们使用了调制发光二极管 (LED) 手电筒和电子听诊器。音乐播放器的输出用于光调制，听诊器的胸片被黑色胶带覆盖，用作吸收目标和封闭的腔室。这个示范单元在 2015 年 10 月的布卢姆斯伯里灯光节上向公众展示。我们的摊位有 100 多名不同年龄的人参观。20 个家庭返回了深入的评估问卷，这表明我们对光声效应的解释得到了很好的理解。他们对生物医学工程的兴趣增加了。这表明我们对光声效应的解释得到了很好的理解。他们对生物医学工程的兴趣增加了。这表明我们对光声效应的解释得到了很好的理解。他们对生物医学工程的兴趣增加了。