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神经胶质瘤是颅内常见的恶性肿瘤,起源于神经间质细胞,其发病率占颅内原发性肿瘤的第一位[1],术前的准确分级对其治疗及预后有重要的指导意义。常规CT与MRI检查对胶质瘤的诊断与分级有一定限度。PET/CT显像是一种用于探测体内正电子显像剂分布的无创性影像学技术,能反映病变组织的代谢情况和生理变化,揭示脑胶质瘤的生物学特性,从分子水平进行脑胶质瘤的诊断、分级及预后评价。
本研究主要对21例颅内占位疑似脑胶质瘤的患者行11C-胆碱和18F-FDG PET/CT检查,测量病灶最大标准化摄取值(maximum standardized uptake value,SUVmax),并与穿刺活检或手术病理结果进行对照,探讨11C-胆碱和18F-FDG PET/CT显像技术在诊断脑胶质瘤良恶性病变中的价值。
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通过分析21例颅内占位患者,结果发现,18F-FDG SUVmax和11C-胆碱SUVmax与年龄无显著相关性;18F-FDG SUVmax与患者的病理类型也无显著相关性(表 1),而11C-胆碱SUVmax与患者的病理学类型存在一定的相关性(表 2)。病理证实的12例高级别胶质瘤(Ⅲ、Ⅳ)中,18F-FDG显像SUVmax增高者9例,11C-胆碱显像SUV增高者11例;其中7例Ⅳ级胶质瘤的18F-FDG和11C-胆碱显像SUVmax均增高(图 1)。18F-FDG SUVmax越高的颅内占位患者,11C-胆碱SUVmax越高,恶性可能性越高,反之,则为良性可能。
年龄 例数 18F-FDG SUVmax 11C-胆碱SUVmax <50岁 12 10.05±5.12 3.42±1.91 ≥50岁 9 9.87±4.21 2.24±1.83 t值 0.131 0.243 P值 >0.05 >0.05 注:表中,SUVmax为最大标准化摄取值。 表 1 21例颅内占位疑似脑胶质瘤患者SUVmax与其年龄关系
(x±s) 病理类型 例数 18F-FDG SUVmax 11C-胆碱SUVmax 脑胶质瘤 18 11.28±6.13 3.67±2.89 颅内良性病变 3 9.35±1.32 1.78±0.61 t值 0.654 2.096 P值 >0.05 <0.05 注:表中,SUVmax为最大标准化摄取值。 表 2 21例颅内占位疑似脑胶质瘤患者SUVmax与其病理类型的关系
(x±s)
11C-胆碱和18F-FDG PET/CT显像在脑胶质瘤诊断中的应用
Application of 11C-choline and 18F-FDG PET/CT in diagnosing brain glioma
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摘要:
目的 探讨11C-胆碱和18F-FDG PET/CT在脑胶质瘤显像中的意义,以提高PET/CT对脑胶质瘤病变的诊断价值。 方法 分别对21例颅脑占位疑似脑胶质瘤患者行11C-胆碱及18F-FDG PET/CT颅脑显像,分析11C-胆碱和18F-FDG最大标准化摄取值(SUVmax)与患者年龄、病理类型之间的关系。 结果 21例患者的18F-FDG和11C-胆碱SUVmax与患者年龄无显著相关性,18F-FDG SUVmax与病变的良、恶性也无显著相关性,而11C-胆碱SUVmax与病变良、恶性存在一定相关性。 结论 11C-胆碱PET/CT在诊断和鉴别颅内胶质瘤病变中具有重要的价值和意义。 -
关键词:
- 神经胶质瘤 /
- 碳放射性同位素 /
- 胆碱 /
- 氟脱氧葡萄糖F18 /
- 正电子发射断层显像术 /
- 体层摄影术,X线计算机
Abstract:Objective To study the value of PET/CT using 11C-choline and that of PET/CT using 18F-FDG for the diagnosis of brain glioma. Methods Twenty-one cases of suspected brain glioma were examined. 11C-choline PET/CT and 18F-FDGPET/CT were performed on each patient to analyze the relevance of maximum standardized uptake value(SUVmax) of 11C-choline and 18F-FDG to the age and pathological types of patients with glioma. Results Of 21 patients, there was no significant correlation between SUVmax of 11C-choline and 18F-FDG and their age, and between SUVmax of 18F-FDG and benign and malignant tumors among patients, whereas there was certain correlation between SUVmax of 11C-choline and benign and malignant tumors among patients. Conclusion 11C-choline PET/CT is of great clinical value in diagnosing and differentiating brain glioma. -
表 1 21例颅内占位疑似脑胶质瘤患者SUVmax与其年龄关系
(x±s) 年龄 例数 18F-FDG SUVmax 11C-胆碱SUVmax <50岁 12 10.05±5.12 3.42±1.91 ≥50岁 9 9.87±4.21 2.24±1.83 t值 0.131 0.243 P值 >0.05 >0.05 注:表中,SUVmax为最大标准化摄取值。 表 2 21例颅内占位疑似脑胶质瘤患者SUVmax与其病理类型的关系
(x±s) 病理类型 例数 18F-FDG SUVmax 11C-胆碱SUVmax 脑胶质瘤 18 11.28±6.13 3.67±2.89 颅内良性病变 3 9.35±1.32 1.78±0.61 t值 0.654 2.096 P值 >0.05 <0.05 注:表中,SUVmax为最大标准化摄取值。 -
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