100例正常人脑底动脉直径的MR血管成像测量

Diameter measurements of cerebral arteries on three-dimensional time-of-flight MR angiograms

目的 测量并建立国人正常脑底动脉直径磁共振血管成像 (MRA)正常值。方法 常规MR检查脑实质及脑动脉三维时间飞越法 ( 3DTOF)MRA检查脑底动脉表现无异常者 10 0例 ,其中男5 3例 ,女 47例 ,年龄 4～ 75岁 ,平均 45 8岁 ;≤ 14岁者 12例 ,>14岁者 88例。采用投影仪放大胶片间接测量法测量各脑动脉直径 ,分析其左右侧、年龄和性别上的差异性 ,并统计出各动脉直径的正常参考值。结果 各脑动脉直径测量值为 :眼动脉 (OphA)男为 ( 0 8± 0 2 )mm ,女为 ( 0 9± 0 2 )mm ;颈内动脉 (ICA)C2段男为 ( 3 0± 0 3)mm(≤ 14岁 )和 ( 3 5± 0 6 )mm( >14岁 ) ,女为 ( 2 8± 0 6 )mm(≤14岁 )和 ( 3 1± 0 5 )mm( >14岁 ) ;ICAC4段男为 ( 4 3± 0 6 )mm ,女为 ( 3 9± 0 6 )mm ;大脑前动脉(ACA)A1段男为 ( 2 1± 0 4)mm ,女为 ( 2 1± 0 4)mm ;前交通动脉 (ACoA)男为 ( 1 4± 0 4)mm ,女为( 1 3± 0 4)mm ;大脑中动脉 (MCA)M1段男为 ( 2 7± 0 4)mm ,女为 ( 2 6± 0 4)mm ;基底动脉 (BA)男为 ( 2 9± 0 5 )mm ,女为 ( 2 8± 0 4)mm ;大脑后动脉 (PCA)P1段男左为 ( 2 1± 0 5 )mm、右为 ( 2 0±0 5 )mm ,女左为 ( 2 0± 0 3)mm、右为 ( 1 9± 0 3)mm ;PCAP2段男为 ( 1 8± 0 4)

Objective To measure and establish the normal values of diameters of Chinese cerebral arteries on MRA. Methods The diameters of the cerebral arteries in 100 persons with normal findings on 3D TOF MRA were measured with projector. There were 53 males and 47 females with the mean age of 45.8 years. 12 subjects were younger than 14 years and 88 were older than 14 years. The diameter differences between the left and the right, in gender and in ages were analyzed statistically. Results The measurements of each arterial diameter were as follows: Ophthalmic artery: (0.8±0.2) mm in male, (0.9±0.2) mm in female. C2 segment of internal carotid artery (ICA-C2): (3.0±0.3) mm (≤14 years) and (3.5±0.6) mm (>14 years) in male, (2.8±0.6) mm (≤14 years) and (3.1±0.5) mm (>14 years) in female. ICA-C4: (4.3±0.6) mm in male, (3.9±0.6) mm in female. A1 segment of anterior cerebral artery (ACA-A1): (2.1±0.4) mm in male, (2.1±0.4) mm in female. Anterior communicating artery (ACoA): (1.4±0.4) mm in male, (1.3±0.4) mm in female. M1 segment of middle cerebral artery (MCA-M1): (2.7±0.4) mm in male, (2.6±0.4) mm in female. Basilar artery (BA): (2.9±0.5) mm in male, (2.8±0.4) mm in female. P1 segment of posterior cerebral artery (PCA-P1): (2.1±0.5) mm on the left and (2.0±0.5) mm on the right in male, (2.0±0.3) mm on the left and (1.9±0.3) mm on the right in female. PCA-P2: (1.8±0.4) mm in male, (1.7±0.3) mm in female. Posterior communicating artery (PCoA): (1.1±0.3) mm in male, (1.2±0.4) mm in female. Among various diameters, only PCA-P1 had significant difference between the left and the right (P=0.003); only MCA-M1 (P=0.048), PCA-P1 (P=0.012), ICA-C2 (P=0.000) and C4 segments (P=0.000) had significant differences in gender, respectively; and only ICA-C2 had significant difference in age (P=0.001). Of these significantly different diameters, the diameters in male were larger than those in female. There were significant correlation between PCA-P1 and PCA-P2 (r=0.652,P=0.000), and between ICA-C2 and ICA-C4 in female group (r=0.550,P=0.000), respectively. Conclusions The normal values of diameter of cerebral arteries on MR angiograms may play a reference role in diagnosing cerebral vascular diseases.