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首页> 外文会议>Conference on Biomedical Thermoacoustics, Optoacoustics, and Acousto-Optics >128-channel laser optoacoustic imaging system (LOIS-128) for breast cancer diagnostics
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128-channel laser optoacoustic imaging system (LOIS-128) for breast cancer diagnostics

机译：128通道激光光声成像系统（LOIS-128）用于乳腺癌诊断

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We have designed, fabricated and tested a new 128-channel laser optoacoustic imaging system (LOIS-128) for cancer diagnostics consisting of an acoustic probe with 128 PVDF transducers, a digital signal processor with 128 independent channels, and software for reconstruction of optoacoustic images. The system was capable of continuous planar imaging (at rates up to 1 Hz) of small (less than 1 cm) tumors at depths over 6 cm. The directivity of the optoacoustic transducers used in LOIS-128 assured that signal detection at all angles within a narrow imaging slice was at least 40% of the maximal signal. The signal detection was better than 70% of the maximum for about 75% of the image in the image slice and close to zero for signals coming from out of the image slice. LOIS-128 could image high-aspect-ratio objects with about 0.5 mm resolution. Finally, with the designed image reconstruction algorithm we were able to estimate absorption coefficients for test objects with accuracy of at least 5%.
机译：我们已经设计，制造和测试了新的128通道激光光声成像系统（LOIS-128），用于由带有128个PVDF传感器的声学探头组成的癌症诊断，数​​字信号处理器，具有128个独立通道的数字信号处理器，以及用于重建光声图像的软件。该系统能够在6厘米超过6厘米的深度下连续平面成像（在高达1 Hz）的小（小于1cm）的肿瘤。 LOIS-128中使用的光声换能器的方向性确保了窄成像切片内的所有角度的信号检测为最大信号的至少40％。信号检测在图像切片中的图像切片中的图像中的约75％的75％的70％优于70％，用于从图像切片出来的信号。 LOIS-128可以通过大约0.5mm的分辨率进行图像的高纵横比对象。最后，通过设计的图像重建算法，我们能够估计测试对象的吸收系数，精度至少为5％。

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