Optical coherence tomography (OCT) reveals subsurface colorectal tissue abnormality and cancers. Quantitative OCT can identify different types of colorectal tissue from functional scattering coefficient maps. This image illustrates the representative OCT colorectal tissue scattering maps of normal, adenomatous polyp, almost invisible cancer, and visually distinguishable cancer.

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光学相干断层扫描（OCT）揭示了地下结肠直肠组织异常和癌症。定量OCT可以从功能散射系数图上识别不同类型的结直肠组织。此图像显示了正常，腺瘤性息肉，几乎看不见的癌症和视觉上可分辨的癌症的代表性OCT大肠组织散射图。