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要旨●小腸血管性病変は小腸出血の原因となり,その診断にカプセル内視鏡検査は有用である.しかし,小腸内には胆汁が存在することで時に視認性を低下させることがある.FICEを用いたカプセル内視鏡観察は小腸病変の診断率を上げるための画像強調技術である.FICE 1は観察の妨げとなる色素胆汁を透過したように見せることで通常観察(白色光)と同様の色調で血管性病変を強調する.FICE 2は色素胆汁をあえてシアンに着色し,血管性病変との色差を大きくすることで,その判別を容易にする.小腸血管性病変が想定される症例では,FICE 1あるいはFICE 2を用いたほうが通常観察(白色光)よりも高い診断率を得られる可能性がある.
Small bowel vascular lesions frequently cause small intestinal bleeding, and capsule endoscopy is useful for their diagnosis. Capsule endoscopy with FICE(flexible spectral color enhancement)is an image enhancement technique designed to increase the diagnostic yield of small bowel lesions. FICE 1 makes vascular lesions appear transparent to the pigmented bile that hinders vision, thereby highlighting them with a color tone similar to that of normal observation. FICE 2 is an image enhancement technique that increases the color difference between vascular lesions and pigmented bile that is intentionally colored in cyan, subsequently making their differentiation easier. FICE 1 or FICE 2 may provide a higher diagnostic yield than conventional light observation in cases where small bowel vascular lesions are expected.
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