心包炎通常是全身多个系统疾病的一部分以及某些全身疾病的首发表现。因此，找到并去除全身疾病的病因，尽早干预并延缓疾病的进程则有助于预防长期并发症，改善患者预后。由于心包活检获得心包积液或心包组织的难度相对较大，阳性率较低，因此，鉴定心包炎的病因一直都是难点。n 18F-FDG PET/CT可一次性将全身的生理代谢信息和解剖学信息融合，在判定心包炎的病因方面具有重要价值。另外，其在确定疾病的分期和分级、疗效评估和预后，尤其是早期鉴别肿瘤复发、肿瘤再分期、寻找肿瘤原发病灶和定位放疗生物靶区等方面都极具优势。笔者就n 18F-FDG PET/CT在心包炎诊断中的应用价值进行综述。n “,”Pericarditis is usually part of multiple systemic diseases and the first manifestation of some systemic diseases. Therefore, to find and remove the cause of systemic diseases and early intervention to delay the disease progression are helpful to prevent long-term complications and improve patient prognosis. Because it is relatively difficult to obtain pericardial effusion or pericardial tissue by pericardial biopsy, and the positive rate of biopsy is low, the identification of the cause of pericarditis is always being a difficult point. n 18F-FDG PET/CT can integrate systemic physiological, metabolic, and anatomical information at one time, and has important value in determining the etiology of pericarditis. In addition, it has great advantages on determining the staging and grading of the disease, evaluating the therapeutic effect, and prognosticating, especially in the early identification of tumor recurrence, tumor restaging of the tumor, searching for the primary tumor, and positioning of the biological target area of radiotherapy. The author reviews the application value of n 18F-FDG PET/CT in the diagnosis of pericarditis.n