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18F-脱氧葡萄糖(FDG)是目前最常用的广谱肿瘤显像剂，但在某些肿瘤的应用上存在一定的局限性。成纤维细胞激活蛋白(FAP)选择性地表达于90%以上的恶性上皮肿瘤，而在正常组织及良性肿瘤中几乎不表达，成纤维细胞激活蛋白抑制剂(FAPIs)可与FAP特异性结合，选择性地靶向FAP阳性的组织。核素标记FAPIs，如n 68Ga-FAPIs在肿瘤显像中具有安全可靠、组织本底低等特点，并能对多种实体瘤进行显像，有望作为新的肿瘤广谱显像剂在临床应用发挥更大作用。该文就国内外FAPIs在肿瘤显像及诊断的最新进展做一综述。n “,”18F-fluorodeoxyglucose (FDG) is the most commonly used broad-spectrum tumor imaging agent, but there are certain limitations in the application of some tumors. Fibroblast activation protein (FAP) is selectively expressed in more than 90% of malignant epithelial tumors, while it is hardly expressed in normal tissues and benign tumors. FAP inhibitors (FAPIs) specifically bind to FAP and selectively target FAP-positive tissues. In recent years, it has been reported that radionuclide-labeled FAPIs, such as n 68Ga-FAPIs, are safe and reliable in tumor imaging and have low tissue background. They can also be used to image a variety of solid tumors, which are expected to be new tumor broad-spectrum imaging agents and play a greater role in clinical applications. This article reviews the recent progress of FAPIs in tumor imaging and diagnosis at home and abroad.n