图 1  采用稀疏分解法的PAT图像重建结果^[15]。 (a)仿体的几何结构图；(b)光吸收能量分布图；(c)光通量分布图；(d)光吸收系数分布图

Figure 1.  Results of PAT image reconstruction by using the sparse decomposition algorithm^[15]. (a) Geometry of the phantom to be imaged; (b) optical absorption distribution; (c) light fluence distribution; (d) optical absorption coefficient

图 2  充分激活RSFP前后的三维光声图像^[19]。(a)激活前；(b)激活后

Figure 2.  Three-dimensional photoacoustic images (a) before and (b) after full activation of RSFPs^[19]. Reprinted with permission from © The Optical Society.

图 3  PA-AO联合成像实验装置原理图^[20]

Figure 3.  Schematic diagram of experimental setup of PA-AO joint imaging^[20]. Reprinted with permission from © The Optical Society.

图 4  采用PA-AO光谱组合法得到的光声图像^[20]。（a） λ=755 nm时从side1（左图）和side2（右图）照射介质得到的光声图像；（b） λ=780 nm时从side1（左图）和side2（右图）照射介质得到的光声图像；（c） λ=755 nm（左图）和λ=780 nm（右图）时补偿光通量后的光声图像

Figure 4.  PA images obtained by using PA-AO spectral combination method^[20]. (a) PA images by exciting the medium from side 1 (Left) and side 2 (Right) when λ=755 nm; (b) PA images by exciting the medium from side 1 (Left) and side 2 (Right) when λ=780 nm; (c) PA images of λ=755 nm (Left) and λ=780 nm (Right) after light fluence compensation. Reprinted with permission from © The Optical Society.

图 5  手持式乳腺PAUS成像装置示意图^[23]。(a)成像装置示意图；(b)中央切割平面的光通量

Figure 5.  Schematic diagram of handheld breast PAUS setup^[23]. (a) Imaging setup; (b) map of light fluence in the central cut plane

图 6  补偿光通量前后的乳腺图像^[23]。(a)未补偿光通量的PAT图像；(b)补偿光通量后的PAT图像；(c)未补偿光通量的PAUS图像；(d)补偿光通量的PAUS图像

Figure 6.  Breast images before and after compensation for light fluence^[23]. PAT image before (a) and after (b) light fluence compensation; PAUS dual-modal image before (c) and after (d) light fluence compensation

图 7  光声-被动超声融合成像原理示意图^[24]

Figure 7.  Schematic diagram of photoacoustic-passive ultrasonic fusion imaging^[24]

图 8  光声与光声-被动超声融合图像对比^[24]。(a)光声图像；(b)光声-被动超声融合图像

Figure 8.  Comparison of (a) photoacoustic images and (b) photoacoustic-passive ultrasonic fusion images^[24]

图 9  PAT-DOT的成像结果^[28]。 (a) DOT测量的光吸收系数和散射系数分布图；(b)组织表面的光通量分布图；(c)补偿光通量之前的PAT图像；(d)补偿光通量之后的PAT图像

Figure 9.  Results of the PAT-DOT method^[28]. (a) The distributions of optical absorption coefficient and scattering coefficient measured by DOT; (b) light fluence on the phantom surface; PAT images (c) before and (d) after compensating for light fluence

图 10  光子在注入点1、标记体积2和检测器位置3之间的轨迹示意图^[30]

Figure 10.  Schematic of photon trajectories between injection point 1, labeling volume 2 and detector position 3^[30]

图 11  采用表面光增强法的PAY图像重建结果^[35]

Figure 11.  Results of PAT image reconstruction with the augmented PAT^[35]. Reprinted with permission from © The Optical Society.

图 12  采用旋转照明的乳房三维PAT系统示意图^[36]。(a) PAT系统；(b)乳房假体的二维横截面

Figure 12.  An illustration of 3D breast PAT system employing the rotating partial illumination design^[36]. (a) Imaging system; (b) 2D cross-section of the numerical breast phantom

图 13  非平稳照明示意图^[37]

Figure 13.  Schematic diagram of non-stationary illumination^[37]. Reprinted with permission from © The Optical Society.

图 14  内置光捕捉器的高频光声成像探头示意图^[39]

Figure 14.  Schematic diagram of high-frequency photoacoustic imaging probe with built-in light catcher^[39]

图 15  采用光捕捉器增强照明（a）前（b）后的光声图像对比^[39]

Figure 15.  Comparison of photoacoustic images before (a) and after (b) enhanced illumination by using light catcher^[39]

图 16  3D打印的样品室、支架、超声换能器阵列和待成像目标的（a）装配图和（b）实物照片^[41]

Figure 16.  (a) Assembly diagram and (b) photograph of 3D-printed sample chamber, entire holder, ultrasound matrix array transducer and imaged target^[41]

图 17  (a)光纤扩散器实物照片；(b)光纤扩散器照明^[42]

Figure 17.  (a) Photograph of the fiber diffuser; (b) fiber diffuse illumination^[42]

图 18  (a)外部照明与(b)内部照明PAT图像对比^[42]

Figure 18.  PAT images with (a) external and (b) internal illumination^[42]