摘要
目的研究3D伪连续脉冲动脉自旋标记(PCASL)序列测量颈性眩晕导致的脑血流变化。方法收集MRA无脑血管病变的颈性眩晕患者17例为患者组,正常志愿者14名为对照组,在眩晕诱发试验前后各行1次3DPCASL检查,通过脑血流量(CBF)图像测量双侧小脑下前动脉(AICA)、双侧小脑下后动脉(PICA)、双侧小脑上动脉(SCA)、双侧大脑前动脉(ACA)、双侧大脑中动脉(MCA)、双侧大脑后动脉(PCA)供血区及脑桥背侧的CBF值,计算眩晕诱发试验前后各ROI的CBF变化值。采用独立样本t检验方法,比较患者组与对照组对应部位的CBF变化值。结果患者组中右侧PICA、右侧AICA、双侧SCA、双侧PCA、右侧ACA及脑桥背侧供血区域CBF变化值与对照组比较差异有统计学意义(t值为2.30~3.99,P值均〈0.05),患者组在这些区域眩晕诱发试验后CBF均显著下降。患者组与对照组各ROI的CBF变化值如下:(1)右侧PICA:(-3.86±6.43)、(0.63±4.37)ml/(min·100g);(2)右fJn0AICA:(-4.30±6.79)、(0.39±3.51)ml/(min·100g);(3)SCA:左侧:(-7.15±6.70)、(-0.27±3.89)ml/(min·100g),右倾4(6.99±6.34)、(-0.68±3.18)m]/(min·100g);(4)PCA:左侧:(-7.39±6.31)、(-0.39±3.24)ml/(rain·100g),右侧:(-7.86±6.48)、(-1.41±2.91)ml/(rain·100g);(5)右侧ACA:(-3.50±4.03)、(0.16±3.07)mE/(min·100g);(6)脑桥背侧:(-5.91±7.34)、(0.06±3.41)ml/(rain·100g)。结论3DPCASL能够测量到眩晕诱发试验引发的CBF下降,颈性眩晕发作可能与颈椎位置变化引起的后循环缺血.有关。
Objective To quantitatively investigate the change of cerebral blood flow (CBF) induced by cervical vertigo by using 3D pseudo-continuous arterial spin labeling (3D PCASL). Methods This study included 17 patients without cerebral arterial stenosis on MRA as the patient group and 14 healthy volunteers as the control group. They were examined by 3D PCASL before and after the vertigo-inducing test respectively. CBF was measured in regions of interest (ROI) which were perfused by bilateral anteroinferior cerebellar artery ( AICA ), posteroinferior cerebellar artery ( PICA ), superior cerebellar artery ( SCA ), posterior cerebral artery ( PCA ) , middle cerebral artery ( MCA ) , anterior cerebral artery ( ACA ) and posterior pons. The change of CBF caused by the vertigo-inducing test was calculated for every ROI. Independent t test was used to compare the change of CBF between the patients and controls. Results There was significant difference of change of CBF in the ROIs of R-PICA, R-AICA, R-ACA, bilateral SCA, bilateral PCA territory and posterior pons between the patients and controls ( t = 2. 30 to 3.99, P 〈 0.05 ). CBF values in these ROIs were significantly decreased after the vertigo-inducing test in the patients. The changes of CBF in ROIs of patients and controls were as following : ( 1 ) R-PICA ( - 3.86±6.43 ) vs. (0. 63 ±4. 37) ml/(min · 100 g) ; (2) R-AICA ( -4. 30 ±6. 79) vs. (0. 39 ±3.51) ml/(min· 100 g) ; (3) SCA: ( -7. 15 ±6.70) vs. ( -0.27 ±3.89) ml/(min· 100 g) for the left side,(6. 99 ±6.34) vs.(-0.68±3.18) ml/(min · 100 g) for the right side; (4) PCA: (-7.39±6.31) vs. ( -0.39±3.24) ml/(min- 100g) for the left side,(-7.86±6.48) vs. ( -1.00±2.91) ml/(min- 100 g) for the right side; (5) R-ACA (-3.50±4.03) vs. (0,16±3.07) ml/(min ~ 100 g); (6) posterior pons ( -5.91 ±7.34) vs. (0.06 ±3.41 ) ml/( min ·100 g). Conclusions 3D PCASL is able to deteet the CBF change induced by vertigo-inducing test. Cervical vertigo onset is related to posterior circulation ischemia,which may be caused by the spinal position changes.
出处
《中华放射学杂志》
CAS
CSCD
北大核心
2014年第1期25-28,共4页
Chinese Journal of Radiology
基金
国家自然科学基金资助项目(81205455)
关键词
眩晕
颈椎病
磁共振成像
Vertigo
Cervical spondylosis
Magnetic resonance imaging