Fast optical-resolution photoacoustic microscopy using a 2-axis water-proofing MEMS scanner.

Fast optical-resolution photoacoustic microscopy using a 2-axis water-proofing MEMS scanner.
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DOI:
10.1038/srep07932
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发表时间:
2015-01-21
期刊:
影响因子:
4.6
通讯作者:
Kim C
Kim C
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Kim JY;Lee C;Park K;Lim G;Kim C

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光学分辨光声显微镜(OR-PAM)是一种新型的无标记显微成像工具,可提供体内光吸收对比。特别是,它是至关重要的,以配备一个实时成像能力,而不牺牲高信噪比(SNR)的识别和跟踪特定疾病的OR-PAM。在这里,我们展示了一个2轴防水MEMS扫描器制成的柔性PDMS。这款灵活的扫描仪可实现宽扫描范围(横向平面内为9 × 4 mm 2)和快速成像速度(每秒5张B扫描图像)。 此外,MEMS扫描器以15 × 15 × 15 mm 3的紧凑尺寸制造。 更重要的是,在水中的扫描能力使得MEMS扫描器可以共焦并同时反射超声和激光,因此我们可以保持高SNR。OR-PAM系统的横向和轴向分辨率分别为3.6和27.7 μm。 我们已经成功地监测了碳颗粒在体外的体积显示帧速率为0.14赫兹。 最后,我们成功地获得了在体内PA图像的微血管在小鼠耳朵。预计我们的紧凑和快速的OR-PAM系统可以在临床前和临床应用中显着有用。
Optical-resolution photoacoustic microscopy (OR-PAM) is a novel label-free microscopic imaging tool to provide in vivo optical absorbing contrasts. Specially, it is crucial to equip a real-time imaging capability without sacrificing high signal-to-noise ratios (SNRs) for identifying and tracking specific diseases in OR-PAM. Herein we demonstrate a 2-axis water-proofing MEMS scanner made of flexible PDMS. This flexible scanner results in a wide scanning range (9 × 4 mm2 in a transverse plane) and a fast imaging speed (5 B-scan images per second). Further, the MEMS scanner is fabricated in a compact footprint with a size of 15 × 15 × 15 mm3. More importantly, the scanning ability in water makes the MEMS scanner possible to confocally and simultaneously reflect both ultrasound and laser, and consequently we can maintain high SNRs. The lateral and axial resolutions of the OR-PAM system are 3.6 and 27.7 μm, respectively. We have successfully monitored the flow of carbon particles in vitro with a volumetric display frame rate of 0.14 Hz. Finally, we have successfully obtained in vivo PA images of microvasculatures in a mouse ear. It is expected that our compact and fast OR-PAM system can be significantly useful in both preclinical and clinical applications.
DOI: 10.1364/ol.36.001236
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影响因子: 3.6
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影响因子: --
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影响因子: 3.6
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发表时间: 2000-03-01
影响因子: 2.7
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