光声成像技术是近年来兴起的前列腺早期检测与成像的新技术。前列腺组织的结构特征需要一种无创的且光穿透深度足够大的光声激发方式。本文设计了一种可用于经由尿道对前列腺光辐照的侧向光源,并结合直肠处长焦区聚焦式超声换能器的光声探测展开了前列腺仿体的光声扫描成像。结果表明,侧向光源有利于单侧吸收体的定位和成像,具有较好的成像范围和深度,结合侧向光源的旋转可实现全方位成像。因此该侧向光源有望成为早期前列腺肿瘤光声成像技术中一种新型的光源结构,具有重要意义。 Photoacoustic imaging technology is emerging in recent years, early detection and imaging of prostate new technology. The structural features of prostate tissue require a noninvasive, photoacoustic excitation mode with a sufficient depth of light penetration. In this paper, we design a lateral light source that can be used to irradiate the prostate light via the urethra, and start the photoacoustic scanning imaging of prostate fimbriae in combination with the photoacoustic detection of the focal length focusing ultrasound transducer in the rectum. The results show that the lateral light source facilitates the positioning and imaging of the unilateral absorber, has a good imaging range and depth, and can realize omnidirectional imaging with the rotation of the lateral light source. Therefore, the lateral light source is expected to become a new type of light source structure in the photoacoustic imaging of early prostate tumors, which is of great significance.