Vertebral artery orifice stenting may improve blood supply of the posterior circulation of the brain to regions such as the cerebellum and brainstem. However, previous studies have mainly focused on recovery of cerebr...Vertebral artery orifice stenting may improve blood supply of the posterior circulation of the brain to regions such as the cerebellum and brainstem. However, previous studies have mainly focused on recovery of cerebral blood flow and perfusion in the posterior circulation after interventional therapy. This study examined the effects of functional recovery of local brain tissue on cerebellar function remodeling using blood oxygen level-dependent functional magnetic reso- nance imaging before and after interventional therapy. A total of 40 Chinese patients with severe unilateral vertebral artery orifice stenosis were enrolled in this study. Patients were equally and randomly assigned to intervention and control groups. The control group received drug treat- ment only. The intervention group received vertebral artery orifice angioplasty and stenting ＋ identical drug treatment to the control group. At 13 days after treatment, the Dizziness Handicap Inventory score was compared between the intervention and control groups. Cerebellar function remodeling was observed between the two groups using blood oxygen level-dependent functional magnetic resonance imaging. The improvement in dizziness handicap and cerebellar function was more obvious in the intervention group than in the control group. Interventional therapy for severe vertebral artery orifice stenosis may effectively promote cerebellar function remodeling and exert neuroprotective effects.展开更多
Employing magnetic resonance diffusion tensor imaging, three-dimensional white-matter imaging and conventional magnetic resonance imaging can demonstrate the tumor parenchyma, peritumoral edema and compression on surr...Employing magnetic resonance diffusion tensor imaging, three-dimensional white-matter imaging and conventional magnetic resonance imaging can demonstrate the tumor parenchyma, peritumoral edema and compression on surrounding brain tissue. A color-coded tensor map and three-dimensional tracer diagram were applied to clearly display the optic-radiation location, course and damage. Results showed that the altered anisotropy values of meningioma patients corresponded with optic-radiation shape, size and position on both sides. Experimental findings indicate that the magnetic resonance diffusion tensor imaging technique is a means of tracing and clearly visualizing the optic radiation.展开更多
AIM To assess the correlation of lateral recess stenosis(LRS) of lumbar segments L4/5 and L5/S1 and the Oswestry Disability Index(ODI).METHODS Nine hundred and twenty-seven patients with history of low back pain were ...AIM To assess the correlation of lateral recess stenosis(LRS) of lumbar segments L4/5 and L5/S1 and the Oswestry Disability Index(ODI).METHODS Nine hundred and twenty-seven patients with history of low back pain were included in this uncontrolled study.On magnetic resonance images(MRI) the lateral recesses(LR) at lumbar levels L4/5 and L5/S1 were evaluated and each nerve root was classified into a 4-point grading scale(Grade 0-3) as normal,not deviated,deviated or compressed.Patient symptoms and disability were assessed using ODI.The Spearman's rank correlation coefficient was used for statistical analysis(P < 0.05).RESULTS Approximately half of the LR revealed stenosis(grade 1-3;52% at level L4/5 and 42% at level L5/S1) with 2.2% and 1.9% respectively reveal a nerve root compression.The ODI score ranged from 0%-91.11% with an arithmetic mean of 34.06% ± 16.89%.We observed a very weak statistically significant positive correlation between ODI and LRS at lumbar levels L4/5 and L5/S1,each bilaterally(L4/5 left:rho < 0.105,P < 0.01;L4/5 right:rho < 0.111,P < 0.01;L5/S1 left:rho 0.128,P < 0.01;L5/S1 right:rho < 0.157,P < 0.001).CONCLUSION Although MRI is the standard imaging tool for diagnosing lumbar spinal stenosis,this study showed only a weak correlation of LRS on MRI and clinical findings.This can be attributed to a number of reasons outlined in this study,underlining that imaging findings alone are not sufficient to establish a reliable diagnosis for patients with LRS.展开更多
Objective To observe the value of grey-level histogram analysis based on T2WI for differentiating consistency of meningioma.Methods Data of 109 patients with meningioma were retrospectively analyzed.The patients were ...Objective To observe the value of grey-level histogram analysis based on T2WI for differentiating consistency of meningioma.Methods Data of 109 patients with meningioma were retrospectively analyzed.The patients were divided into hard group(n=71)and soft group(n=38)according to the consistency of tumors.Tumor ROI was outlined on axial T2WI showing the largest tumor section,gray levels were extracted and histogram analysis was performed.The value of each histogram parameter were compared between groups.Then receiver operating characteristic curve was drawn,and the area under the curve(AUC)was calculated to evaluate the efficiency for differentiating soft and hard meningioma.Results P 1,P 10,P 50,P 90,P 99 and the mean grey levels on T2WI in soft group were all higher than those in hard group(all P<0.05),while the variance,the kurtosis and the skewness were not significantly different between groups(all P>0.05).The differentiating efficiency of P 1,P 10,P 50,P 90,P 99 and the mean grey levels on T2WI were all fine,with AUC of 0.774 to 0.833,and no significant difference was found(all P>0.05).Conclusion Parameters of grey-level histogram analysis such as P 1,P 10,P 50,P 90,P 99 and the mean values based on T2WI were all valuable for differentiating soft and hard meningioma.展开更多
本文为回顾性研究,遵守《赫尔辛基宣言》,经过兰州大学第二医院伦理委员会批准,免除受试者知情同意,批准文号:2023A-169。患者女,60岁,因“右上肢麻木无力三个月,加重一周”于2018年5月至兰州大学第二医院就诊。专科检查:神志清,格拉斯...本文为回顾性研究,遵守《赫尔辛基宣言》,经过兰州大学第二医院伦理委员会批准,免除受试者知情同意,批准文号:2023A-169。患者女,60岁,因“右上肢麻木无力三个月,加重一周”于2018年5月至兰州大学第二医院就诊。专科检查:神志清,格拉斯哥昏迷评分(Glasgow Coma Scale,GCS)15分,查体合作,自动体位,言语清晰,记忆力、理解力、定向力检查未见异常。双侧瞳孔等大等圆,对光反射存在。四肢肌张力正常,四肢体肌力5级,四肢未见肌肉萎缩及震颤。右上肢麻木,以右手手指为著,其余四肢深浅感觉检查未见异常,双侧指鼻试验、跟膝胫试验正常。闭目难立征(−)。颈软无抵抗,双侧克氏征、布氏征均为阴性。实验室检查结果未见明显异常。展开更多
目的分析内听道重复畸形(duplication of the internal auditory canal,DIAC)患者CT及MRI影像学表现,提高对该畸形的认识,为人工耳蜗植入提供术前依据。方法回顾性观察20例(24耳)DIAC患者内耳多层螺旋CT(MSCT)及MRI资料,测量并分析病变...目的分析内听道重复畸形(duplication of the internal auditory canal,DIAC)患者CT及MRI影像学表现,提高对该畸形的认识,为人工耳蜗植入提供术前依据。方法回顾性观察20例(24耳)DIAC患者内耳多层螺旋CT(MSCT)及MRI资料,测量并分析病变组与对照组内听道及蜗神经孔宽度。结果DIAC均为内听道狭窄及合并其他颞骨畸形。MSCT示21耳、MRI水成像示16耳内听道由骨性分隔成双管。MRI水成像示前庭蜗神经纤细。病变、对照组内听道宽度及蜗神经孔宽度均有统计学差异(P<0.001)。6例(8耳)行人工耳蜗植入术后听力均有不同程度恢复。结论DIAC均显示内听道狭窄,MSCT所示骨性分隔为其特征性征象,MRI水成像示前庭蜗神经发育不良,联合两种影像检查方法可为本病诊断和人工听觉植入提供客观参考依据。展开更多
目的:探讨表观弥散系数(apparent diffusion coefficient,ADC)鉴别诊断脑膜瘤组织病理学分级的价值及其与Ki-67增殖指数的关系。方法:回顾并分析经术后病理学检查证实为脑膜瘤的51例患者资料,根据世界卫生组织(World Health Organizatio...目的:探讨表观弥散系数(apparent diffusion coefficient,ADC)鉴别诊断脑膜瘤组织病理学分级的价值及其与Ki-67增殖指数的关系。方法:回顾并分析经术后病理学检查证实为脑膜瘤的51例患者资料,根据世界卫生组织(World Health Organization,WHO)病理学分级分为低级别脑膜瘤(low-grade meningioma,LGM)组45例和高级别脑膜瘤(high-grade meningioma,HGM)组6例,计算平均ADC(ADC_(mean))、最小ADC(ADC_(min)),以及两者相对值(rADC_(mean)、rADC_(min))。比较两组ADC_(mean)、ADC_(min)、rADC_(mean)、rADC_(min)的差异。绘制受试者工作特征(receiver operating characteristic,ROC)曲线评估ADC各参数的鉴别诊断效能,并采用DeLong检验比较ROC曲线的曲线下面积(area under the curve,AUC)的差异。采用Spearman相关分析评估ADC各参数与Ki-67增殖指数之间的相关性。结果:LGM组的ADC_(mean)、ADC_(min)、rADC_(mean)及rADC_(min)均高于HGM组,组间差异有统计学意义(P<0.05)。4种ADC参数均有较好的诊断效能,DeLong检验显示AUC两两比较差异均无统计学意义(P>0.05),其中ADC_(min)的鉴别诊断效能最高,其最佳截断值为0.657×10^(-3)mm^(2)/s,灵敏度为66.67%,特异度为95.56%。ADC_(mean)、ADC_(min)、rADC_(mean)及rADC_(min)均与Ki-67增殖指数呈负相关(P<0.05)。结论:ADC有助于术前预测脑膜瘤的病理学分级及Ki-67增殖指数,可为临床诊疗提供支持。展开更多
基金supported by the Natural Science Foundation of Yongchuan District of Chongqing in China,No.Ycstc,2013nc8031the Foundation of Chongqing Municipal Health Bureau in China,No.2010-2-250+1 种基金the Foundation of Chongqing Health and Family Planning Commission in China,No.20143001the Soft Science Foundation of Yongchuan District of Chongqing in China,No.Ycstc,2011BE5004
文摘Vertebral artery orifice stenting may improve blood supply of the posterior circulation of the brain to regions such as the cerebellum and brainstem. However, previous studies have mainly focused on recovery of cerebral blood flow and perfusion in the posterior circulation after interventional therapy. This study examined the effects of functional recovery of local brain tissue on cerebellar function remodeling using blood oxygen level-dependent functional magnetic reso- nance imaging before and after interventional therapy. A total of 40 Chinese patients with severe unilateral vertebral artery orifice stenosis were enrolled in this study. Patients were equally and randomly assigned to intervention and control groups. The control group received drug treat- ment only. The intervention group received vertebral artery orifice angioplasty and stenting ＋ identical drug treatment to the control group. At 13 days after treatment, the Dizziness Handicap Inventory score was compared between the intervention and control groups. Cerebellar function remodeling was observed between the two groups using blood oxygen level-dependent functional magnetic resonance imaging. The improvement in dizziness handicap and cerebellar function was more obvious in the intervention group than in the control group. Interventional therapy for severe vertebral artery orifice stenosis may effectively promote cerebellar function remodeling and exert neuroprotective effects.
基金supported by the National Natural Science Foundation of China,No.30800349the Natural Science Foundation of Beijing,No.7102145
文摘Employing magnetic resonance diffusion tensor imaging, three-dimensional white-matter imaging and conventional magnetic resonance imaging can demonstrate the tumor parenchyma, peritumoral edema and compression on surrounding brain tissue. A color-coded tensor map and three-dimensional tracer diagram were applied to clearly display the optic-radiation location, course and damage. Results showed that the altered anisotropy values of meningioma patients corresponded with optic-radiation shape, size and position on both sides. Experimental findings indicate that the magnetic resonance diffusion tensor imaging technique is a means of tracing and clearly visualizing the optic radiation.
文摘AIM To assess the correlation of lateral recess stenosis(LRS) of lumbar segments L4/5 and L5/S1 and the Oswestry Disability Index(ODI).METHODS Nine hundred and twenty-seven patients with history of low back pain were included in this uncontrolled study.On magnetic resonance images(MRI) the lateral recesses(LR) at lumbar levels L4/5 and L5/S1 were evaluated and each nerve root was classified into a 4-point grading scale(Grade 0-3) as normal,not deviated,deviated or compressed.Patient symptoms and disability were assessed using ODI.The Spearman's rank correlation coefficient was used for statistical analysis(P < 0.05).RESULTS Approximately half of the LR revealed stenosis(grade 1-3;52% at level L4/5 and 42% at level L5/S1) with 2.2% and 1.9% respectively reveal a nerve root compression.The ODI score ranged from 0%-91.11% with an arithmetic mean of 34.06% ± 16.89%.We observed a very weak statistically significant positive correlation between ODI and LRS at lumbar levels L4/5 and L5/S1,each bilaterally(L4/5 left:rho < 0.105,P < 0.01;L4/5 right:rho < 0.111,P < 0.01;L5/S1 left:rho 0.128,P < 0.01;L5/S1 right:rho < 0.157,P < 0.001).CONCLUSION Although MRI is the standard imaging tool for diagnosing lumbar spinal stenosis,this study showed only a weak correlation of LRS on MRI and clinical findings.This can be attributed to a number of reasons outlined in this study,underlining that imaging findings alone are not sufficient to establish a reliable diagnosis for patients with LRS.
文摘Objective To observe the value of grey-level histogram analysis based on T2WI for differentiating consistency of meningioma.Methods Data of 109 patients with meningioma were retrospectively analyzed.The patients were divided into hard group(n=71)and soft group(n=38)according to the consistency of tumors.Tumor ROI was outlined on axial T2WI showing the largest tumor section,gray levels were extracted and histogram analysis was performed.The value of each histogram parameter were compared between groups.Then receiver operating characteristic curve was drawn,and the area under the curve(AUC)was calculated to evaluate the efficiency for differentiating soft and hard meningioma.Results P 1,P 10,P 50,P 90,P 99 and the mean grey levels on T2WI in soft group were all higher than those in hard group(all P<0.05),while the variance,the kurtosis and the skewness were not significantly different between groups(all P>0.05).The differentiating efficiency of P 1,P 10,P 50,P 90,P 99 and the mean grey levels on T2WI were all fine,with AUC of 0.774 to 0.833,and no significant difference was found(all P>0.05).Conclusion Parameters of grey-level histogram analysis such as P 1,P 10,P 50,P 90,P 99 and the mean values based on T2WI were all valuable for differentiating soft and hard meningioma.
文摘本文为回顾性研究,遵守《赫尔辛基宣言》,经过兰州大学第二医院伦理委员会批准,免除受试者知情同意,批准文号:2023A-169。患者女,60岁,因“右上肢麻木无力三个月,加重一周”于2018年5月至兰州大学第二医院就诊。专科检查:神志清,格拉斯哥昏迷评分(Glasgow Coma Scale,GCS)15分,查体合作,自动体位,言语清晰,记忆力、理解力、定向力检查未见异常。双侧瞳孔等大等圆,对光反射存在。四肢肌张力正常,四肢体肌力5级,四肢未见肌肉萎缩及震颤。右上肢麻木,以右手手指为著,其余四肢深浅感觉检查未见异常,双侧指鼻试验、跟膝胫试验正常。闭目难立征(−)。颈软无抵抗,双侧克氏征、布氏征均为阴性。实验室检查结果未见明显异常。
文摘目的分析内听道重复畸形(duplication of the internal auditory canal,DIAC)患者CT及MRI影像学表现,提高对该畸形的认识,为人工耳蜗植入提供术前依据。方法回顾性观察20例(24耳)DIAC患者内耳多层螺旋CT(MSCT)及MRI资料,测量并分析病变组与对照组内听道及蜗神经孔宽度。结果DIAC均为内听道狭窄及合并其他颞骨畸形。MSCT示21耳、MRI水成像示16耳内听道由骨性分隔成双管。MRI水成像示前庭蜗神经纤细。病变、对照组内听道宽度及蜗神经孔宽度均有统计学差异(P<0.001)。6例(8耳)行人工耳蜗植入术后听力均有不同程度恢复。结论DIAC均显示内听道狭窄,MSCT所示骨性分隔为其特征性征象,MRI水成像示前庭蜗神经发育不良,联合两种影像检查方法可为本病诊断和人工听觉植入提供客观参考依据。
文摘目的:探讨表观弥散系数(apparent diffusion coefficient,ADC)鉴别诊断脑膜瘤组织病理学分级的价值及其与Ki-67增殖指数的关系。方法:回顾并分析经术后病理学检查证实为脑膜瘤的51例患者资料,根据世界卫生组织(World Health Organization,WHO)病理学分级分为低级别脑膜瘤(low-grade meningioma,LGM)组45例和高级别脑膜瘤(high-grade meningioma,HGM)组6例,计算平均ADC(ADC_(mean))、最小ADC(ADC_(min)),以及两者相对值(rADC_(mean)、rADC_(min))。比较两组ADC_(mean)、ADC_(min)、rADC_(mean)、rADC_(min)的差异。绘制受试者工作特征(receiver operating characteristic,ROC)曲线评估ADC各参数的鉴别诊断效能,并采用DeLong检验比较ROC曲线的曲线下面积(area under the curve,AUC)的差异。采用Spearman相关分析评估ADC各参数与Ki-67增殖指数之间的相关性。结果:LGM组的ADC_(mean)、ADC_(min)、rADC_(mean)及rADC_(min)均高于HGM组,组间差异有统计学意义(P<0.05)。4种ADC参数均有较好的诊断效能,DeLong检验显示AUC两两比较差异均无统计学意义(P>0.05),其中ADC_(min)的鉴别诊断效能最高,其最佳截断值为0.657×10^(-3)mm^(2)/s,灵敏度为66.67%,特异度为95.56%。ADC_(mean)、ADC_(min)、rADC_(mean)及rADC_(min)均与Ki-67增殖指数呈负相关(P<0.05)。结论:ADC有助于术前预测脑膜瘤的病理学分级及Ki-67增殖指数,可为临床诊疗提供支持。
