摘要
目的探讨Ap斑块显像剂131I-2一(4’-二甲基氨基苯基)一6-碘咪唑并[1,2-α]吡啶(IMPY)脑SPECT显像对AD的诊断价值。方法对13例AD患者(男3例,女10例,年龄52~79岁)、11例轻度认知损害(MCI)期患者(男4例,女7例,年龄48~67岁)及14名健康志愿者(男6名,女8名,年龄42一一67岁)静脉注射”‘I-IMPY37~74MBq,2—3h后行脑SPECT显像,用ROI技术半定量分析方法计算脑听眦线横断面、矢状面各脑区/d,It~放射性摄取比值(Rcl/cb),并进行两样本间t检验。结果MCI患者中,顶叶、颞叶及额叶与小脑Rcl/cb增加,右侧分别为1.15±0.18,1.18±0.12,1.14±0.14;左侧分别为1.16±0.11,1.19±0.18,1.15±0.09,其与健康志愿者(右侧:1.02±0.12,1.05±0.14,1.0l±0.12;左侧:1.03±0.13,1.05±0.13,1.01±0.14)相比差异有统计学意义(t=2.1642~2.8757,P均〈0.05),而基底部和枕叶与小脑的Rcl/cb右侧为0.92±0.18,1.12±0.15;左侧为0.94±0.15,1.13±0.17,与健康志愿者(右侧:0.82±0.15,1.06±0.18;左侧:0.85±0.16,1.08±0.15)相比差异无统计学意义(t=0.7805~1.4344,P均〉0.05);AD患者中,顶叶、颞叶、额叶、基底部和枕叶与小脑的Rel/cb均有不同程度的增加,右侧为1.16±0.19,1.24±0.17,1.16±0.13,1.14±0.11,1.23±0.10;左侧为1.17±0。2l,1.25-t-O.15,1.18±0.08,1.17±0.16,1.25±0.11,其与健康志愿者相比差异均有统计学意义(t=2.1001~6.2789,P均〈0.05),其中顶叶、颞叶、额叶与小脑的Rcl/cb与MCI患者相比差异无统计学意义(t:0.1316~0.9806,P均〉0。05),基底部和枕叶与小脑的Rcl/cb增加,其与MCI患者相比差异有统计学意义(t=2.0850~3.6772,P均〈0.05)。结论131I-IMPY脑SPECT显像是诊断AD的有效方法,有助于AD的早期诊断。
Objective To evaluate the diagnostic value of brain SPECT imaging with a novel AI3 plaque probe, 131I-2- (4'-dimethylaminophenyl) -6-iodoimidazo [ 1,2-a ] pyridine ( 131 I-IMPY) in early AD. Methods Thirteen patients with AD (3 males, 10 females, age ranged 52 - 79 y), ll with mild cogni- tive impairment (MCI, 4 males, 7 females, age ranged 48 - 67 y) and 14 normal controls (6 males, 8 fe- males, age ranged 42 - 67 y) were enrolled in this study. 13tI-IMPY SPECT imaging was acquired in 2 - 3 h after the agent injection. ROIs were drawn on cerebral lobes and cerebellum. The ratios of mean radio- activity of cerebral lobes over cerebellum (Rcl/cb) were calculated. Tile t-test was used for data analysis. Results In patients with MCI, Rel/eb ratios were increased in parietal gyms, temporal gyms and frontal gyrus (right: 1.15±0.18, 1.18 ±0.12, 1.14 ±0.14; left: 1.16 ±0.11, 1.19 ±0.18, 1.15±0.09) compared with those in normal control group (fight: 1.02 ±0.12, 1.05 ±0.14, 1.01±0. 12; left: 1.03 v0.13, 1.05 ±0.13, 1.01 ±0.14; t=2. 1642 to 2.8757, all P 〈 0.05). Rcl/cb ratios of basel ganglia and oc- cipital gyrus in MCI group (right: 0.92±0. 18,1.12 ±0.15; left: 0.94±0.15, 1.13 ±0.17) showed no statistical difference compared with those in normal control group (right: 0.82± 0.15, 1.06 ±0. 18;left: 0.85 ±0. 16, 1.08 ±0.15; t= 0.7805 to 1.4344, all P〉0.05). In patients with AD, Rcl/cb ratios wereincreased in parietal, temporal, basal ganglia and occipital lobes (right: 1.16 +0.19, 1.24 +0.17, 1.16 ± 0.13, 1.14 ±0.11, 1.23 ±0.10; left: 1.17±0.21, 1.25 ±0.15, 1.18 ±0.08, 1.17 ±0. 16, 1.25 ±0.11) compared with those in normal control group (t = 2. 1001 to 6. 2789, all P 〈 0.05). Rcl/cb ratios of parietal, temporal and frontal lobes in AD group showed no statistical difference compared with those in MCI group (t: 0. 1316 to 0. 9806, all P 〉 0.05 ), while Rcl/cb ratios of basal ganglia and occipital lobes in AD group were increased compared with those in MCI group (t= 2. 0850 to 3. 6772, all P 〈 0.05). Conclusion 131 I-IMPY as a β- amyloid plaque probe for brain SPECT imaging may be potentially helpful for early diagno-
出处
《中华核医学杂志》
CAS
CSCD
北大核心
2011年第5期297-300,共4页
Chinese Journal of Nuclear Medicine
基金
国家自然科学基金(30670714
30870727)