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首页> 外文期刊>Journal of computer assisted tomography >Focal F-18 fluoro-deoxy-glucose accumulation in the lung parenchyma in the absence of CT abnormality in PET/CT.
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Focal F-18 fluoro-deoxy-glucose accumulation in the lung parenchyma in the absence of CT abnormality in PET/CT.

机译：在PET / CT中没有CT异常的情况下，肺实质中的F-18氟-脱氧-葡萄糖聚集在肺实质中。

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OBJECTIVE: To demonstrate 3 cases of artifactual focal F-18 fluoro-deoxy-glucose accumulation in the lung parenchyma in the absence of any computed tomographic (CT) abnormality. MATERIALS AND METHODS: Three patients were examined: a 30-year-old man who had a positron emission tomography (PET)/computed tomography for restaging a biopsy-proven recurrence of head and neck cancer, a 68-year-old woman who was referred for initial staging of esophageal carcinoma, and a 57-year-old man who had a PET/computed tomography for initial staging of melanoma. In each case, there was intense focal activity in the lung parenchyma with no corresponding CT abnormality. Each patient was further evaluated with a repeat PET scan in days 1 and 3 in the first 2 cases and with a delayed repeat acquisition in the third case. Patients were followed for 24, 10, and 1 month, respectively. RESULTS: In the first 2 cases, the abnormal focal activity in the lungs had resolved in the repeat study. In the third case, the focus of increased activity in the lung had moved more peripherally in the delayed acquisition. Clinical follow-up was negative for disease in the corresponding pulmonary parenchymal sites. CONCLUSIONS: The finding of significant focal accumulation of fluoro-deoxy-glucose in the lung parenchyma in the absence of corresponding CT abnormality was artifactual. This was likely due to injection technique and the creation of particulate embolus. Positron emission tomography/Computed tomographic readers should be aware of this type of artifact to avoid misinterpretation.
机译：目的：证实3例在无任何计算机断层扫描（CT）异常的情况下人为局灶性F-18氟-脱氧葡萄糖在肺实质中的蓄积情况。材料与方法：检查了三例患者：一名30岁的男性，因接受活检证实的头颈癌复发而进行了正电子发射断层扫描（PET）/计算机断层扫描，另一名68岁的女性曾提到食管癌的初始分期，以及一名57岁的男子，该人因黑色素瘤的初始分期而进行了PET /计算机断层扫描。在每种情况下，肺实质中都有强烈的局灶活动，而没有相应的CT异常。在前2例中，在第1天和第3天对每个患者进行了进一步的PET扫描评估，在第三例中，其延迟进行了重复采集。分别随访患者24、10和1个月。结果：在前2例中，重复研究消除了肺部异常活动。在第三种情况下，在延迟采集中，肺活动增加的焦点移向了外围。在相应的肺实质部位，该疾病的临床随访结果为阴性。结论：在没有相应的CT异常的情况下，发现肺实质中有大量的氟脱氧葡萄糖灶聚集是人为的。这可能是由于注射技术和微粒栓塞的产生。正电子发射断层扫描/计算机断层扫描的读者应注意这种伪影，以免造成误解。

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