首页> 外文会议>Conference on Optical Tomography and Spectroscopy of Tissue V Jan 26-29, 2003 San Jose, California, USA >Cancerous and normal human tissues investigated by near-infrared time-resolved and spectroscopic imaging techniques
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Cancerous and normal human tissues investigated by near-infrared time-resolved and spectroscopic imaging techniques

机译:通过近红外时间分辨和光谱成像技术研究癌变和正常人体组织

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Spectroscopic and time-sliced two-dimensional (2-D) transillumination imaging methods were used to investigate ex vivo tumor and normal tissues of human breast and parotid gland. The experimental arrangement for time-sliced optical imaging uses 120-fs, 1 kHz repetition-rate, 800-nm light pulses from a Ti:sapphire laser system for sample illumination and a charge coupled device (CCD) camera coupled to a gated image intensifier for recording 2-D images. The spectroscopic imaging arrangement uses 1210-1325 nm tunable output of a Cr: forsterite laser for sample illumination, a Fourier space gate to discriminate against multiple-scattered light, and a near-infrared (NIR) area camera to record 2-D images. Images recorded with earlier temporal slices of transmitted light highlighted tumors, while those recorded with later slices accentuated normal tissues. When light was tuned closer to the 1203 nm absorption resonance of adipose tissues, a marked enhancement in contrast between the images of adipose and fibrous tissues was observed. A similar wavelength-dependent difference between normal and cancerous tissues was observed. These results correlate well with pathology and nuclear magnetic resonance based analyses of the samples. This work demonstrates the advantages of time-resolved spectroscopic approach for imaging tumors in body organs.
机译:光谱和时间切片二维(2-D)透射成像方法用于研究人乳房和腮腺的离体肿瘤和正常组织。用于时间切片光学成像的实验装置使用来自Ti:蓝宝石激光系统的120-fs,1 kHz重复频率,800 nm的光脉冲进行样品照明,并将电荷耦合器件(CCD)摄像机耦合至门控图像增强器用于记录二维图像。光谱成像装置使用Cr:镁橄榄石激光器的1210-1325 nm可调输出进行样品照明,使用傅立叶空间门来区分多散射光,并使用近红外(NIR)区域相机记录二维图像。用较早的透射光时间片记录的图像突出了肿瘤,而用较晚的时间片记录的图像突出了正常组织。当将光调至更接近脂肪组织的1203 nm吸收共振时,观察到脂肪和纤维组织图像之间的对比度明显增强。在正常组织和癌组织之间观察到相似的波长依赖性差异。这些结果与基于病理和核磁共振的样品分析非常相关。这项工作证明了时间分辨光谱法对人体器官肿瘤成像的优势。

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