中国汉族正常成人第四脑室容积的高分辨率MRI测量

目的 测量中国汉族正常成人第四脑室容积的正常值,为建立中国标准脑提供基础数据.方法 采用全国多中心临床研究形式,选取18～70岁健康中国成年志愿者1000名,按照年龄18～30、31～40、41～50、51～60、61～70岁进行分组,分别定义为A、B、C、D、E年龄段组,每组男、女均为100名,对所有受试者均行3D磁化强度预备梯度回波序列T1WI,对3D数据重组后于矢状面通过软件自动追踪结合手工勾绘第四脑室边界测量其容积,对不同性别、不同年龄组统计分析分别采用独立样本t检验、方差分析,对年龄和容积作Pearson相关分析.结果 男、女性第四脑窒容积分别为(2.2±0.9)、(1.9±0.6)ml,性别间差异有统计学意义(t=5.573,P=0.000),男性第四脑室容积大于女性.男性A、B、C、D、E组第四脑室容积分别为(2.1±0.9)、(2.1±0.8)、(2.2±0.8)、(2.1±1.0)、(2.4±0.8)ml,5组间差异有统计学意义(F=2.639,P=0.033),E组与A、B、C、D组分别比较差异均有统计学意义(P值均<0.05);女性分别为(2.0±0.7)、(1.9±0.6)、(1.8±0.6)、(1.9±0.7)、(2.0±0.6)ml,各组间差异无统计学意义(F=1.788,P=0.130).男性容积和年龄有相关,但相关性不强(r=0.119,P=0.008);女性容积和年龄不相关(r=0.041,P=0.360).结论 正常中国成人第四脑窜容积大小存在性别差异;男女性第四脑室容积随年龄变化情况存在不同.     

中国汉族成人额叶体积的高分辨率MRI测量

Objective To explore the normal range of the volume of frontal lobe in Chinese adults of the Han nationality and provide morphological data for the construction of database for Chinese Standard Brain. Methods This is a clinical multi-center study. Two hundred Chinese healthy volunteers (age range= 18 to 70) recruited from 16 hospitals were divided into 5 groups, i. e. , age range from 18 to 30, age range from 31 to 40, age range from 41 to 50, age range from 51 to 60, and age range from 61 to 70. Each group contained 20 males and 20 females. All of the volunteers were scanned by MR using T1 weighted threedimensional magnetization prepared rapid acquisition gradient echo sequence. We used the manual method to trace the region of interest and measured the left and right frontal lobe volumes separately. All the data were analyzed with SPSS (version 13.0). The sex differences in the frontal lobe volumes were analyzed by independent-samples t test, and the side differences were analyzed by paired-samples t test. Correlation and regression analysis was used between the age and the frontal lobe volumes. Results In 200 healthy Chinese Han volunteers, the total frontal lobe volumes was (563 ± 73) cm3. For male, the volumes of the left and the right frontal lobe were (288±42) cm3 and (292 ±41 ) cm3 ,respectively. The volumes of the left and right frontal lobe in 100 women were (273 ±30) cm3 and (274 ± 30) cm3 respectively. The differences of sex (t = 3. 334, P < 0. 05 ) and side ( t = - 3.09, P < 0. 05 ) in the total frontal lobe volumes reach significant. There was no significant differences in women ( t = - 1. 304, P > 0. 05 ). There were negative correlations between the frontal lobe volumes and age in men and women ( r = - 0. 586, - 0. 498, P <0. 01 ). Conclusions The total frontal lobe volume of men was larger than that of women. The volume of the right frontal lobe was larger than the left frontal lobe in men, and the asymmetries didn't exist in women.The total frontal lobe volumes were both shrinking with age in men and women, which was more rapid in men than in women.     

中国汉族正常成人岛叶体积的高分辨率MRI测量

Objective To explore the normal range of the insula volume of Chinese adults of the Han nationality and its relationship with age, which provide morphological data for the construction of database for Chinese Standard Brain.Methods This is a clinical multi-center study.One thousand Chinese healthy volunteers (age range = 18 to 70) recruited from 16 hospitals were divided into 5 groups, i.e.,Group A ( age range = 18 to 30), B ( age range = 31 to 40 ), C ( age range = 41 to 50 ), D ( age range =51 to 60), and E (age range =61 to 70).Each group contained 100 males and 100 females.All of the volunteers were scanned by MR using T1 weighted three-dimensional magnetization prepared rapid acquisition gradient echo sequence.After three dimension data reconstruction, the volumes of bilateral insula were manually measured.The volume of bilateral insula were compared by paired sample t test.The insula volumes were compared between male and female by independent sample t test, and the differences among 5 age groups were compared by one-way ANNOVA.The relationship between the volumes of insula and age,sex or cerebral volume were analyzed using bivariate correlation, respectively.Results The left snd right side volume of insula before standarized were (7764±1165) and (7387±1128) mm3 respectively, after standarized were (8413±1201 ) and (7871±1140) mm3 respectively.The left insula volume were significant larger than that of right(t = - 10.565, - 16.014,P <0.01 ).The left and fight volume of insula were (8146±1181 ) and (7735±1113) mm3 for male, and (7393±1022) mm3 and (7050±1038) mm3for female.The left and right insula volumes for male were larger than the female's(t = 10.934,9.945 ,P <0.01 ).The left and right insula volume of male after standarized were (8779±1230 ) and (8224±1081 )mm3, female were (8043±1054) and (7515±1091 ) mm3 ,the left and right insula volume of male were larger than the female's ( t = 4.858,4.632, P < 0.01 ).The left insula volumes among Group A, B, C, D,E before standarized were ( 8268±1221 ), ( 8067±1107 ), ( 7869±1109), ( 7603±1111 ), ( 6997±934 )mm3 respectively,the right were (8028±1156), (7636±1075), (7294±986), (7249±1068), (6717±916) mm3 respectively, there were significant differences among 5 groups between left and right insula volume(F= -0.361,-0.337,P <0.01 ).The left insula volume of A,B,C,D,E after standarized were ( 9093±1105 ), ( 8679±965 ), ( 8810±1136), ( 8202±980), ( 7273±940 )mm3, the right were ( 8694±1005), (8136±1100), (8034±910), (7496±990), (6989±932) mm3, there were significant differences among 5 groups between left and right insula volume(F = -0.490, -0.512,P < 0.01 ).There was significant negative correlation between the volume and age ( before standarizded:r = -0.361, -0.337, after standardized r = -0.490, -0.512, P<0.05).Before and after standardized, there was significant correlation between the volume of right and left insula and cerebral volume ( r = 0.470,0.459, P < 0.05 ).Before and after standardized, there was significant correlation between the volume of right and left insula and weight( r = 0.141, 0.092, P < 0.05 ).Conclusions 1.5 T MR scanner has high resolution, for distinguishing the white matter from the gray matter, and provide morphological data of insula for the construction of database for Chinese Standard Brain.     

中国汉族正常成人第四脑室容积的高分辨率MRI测量

Objective To explore the normal range of the fourth ventricle volume of Chinese adults of the Han nationality and provide morphological data for the construction of database for Chinese Standard Brain.Methods This is a clinical multi-center study.One thousand Chinese healthy volunteers (age range= 18 to 70) recruited from 15 hospitals were divided into 5 groups, i.e., Group A (age range = 18 to 30),B (age range =31 to 40), C (age range =41 to 50), D (age range =51 to 60), and E (age range =61 to 70).Each group contained 100 males and 100 females.All of the volunteers were scanned by MR using T1 weighted three-dimensional magnetization prepared rapid acquisition gradient echo sequence.After three dimension data reconstruction, the volumes of the fourth ventricle were measured at sagittal view by automatic trace of Midobl.2 combined with manual outlining.The difference of volumes of the fourth ventricle between male and female were analyzed by independent sample t test, and among age groups by ANOVA.Pearson's correlation coeffcient was used to characterize the relationship between volumes of the fourth ventricle and age.Results The fourth ventricle volumes of Group A-E were (2.1±0.9), (2.1±0.8), (2.2±0.8), (2.1±1.0) and (2.4±0.8) ml respectively for male; those for female were(2.0±0.7), (1.9±0.6), (18±0.6), (1.9±0.7) and (2.0±0.6) ml respectively.The fourth ventricle volumes of males were significantly larger than those of females ( t = 5.573, P =0.000 ) ; there were no significant differences among the female groups ( F = 1.788, P = 0.130 ) ; there were significant differences among the male groups ( F = 2.639, P = 0.033 ) and multiple comparison found that the 60 years old was the watershed with significant difference ( P < 0.05 ).Correlation between the change of males' volumes and the ages was not strong (r = 0.119, P = 0.008 ), and the females' volumes did not correlated with their ages ( r = 0.041,P = 0.360 ).Conclusion There are gender differences in the fourth ventricle volumes of normal Chinese adults, and changes of the fourth ventricle volume with aging are different between males and females.     

标准化测量海马体积

目的 分析中国健康成人海马体积与颅内容积(IVC)之间的关系,寻找一种可靠的海马体积校正方法。 方法 对1000名健康成年人行大脑T1加权三维磁化强度预备梯度回波序列扫描。应用三维体积分析软件手工勾画感兴趣区域的方法测量海马的体积,并按头颅高径、前后径、左右径相乘的方法测量IVC。从中选取18~60岁800名健康成人的脑MRI数据,应用相除法和协方差法分析海马体积与IVC的相关性。分别对1000名健康成年人左、右侧的海马原始体积、经相除法和协方差法校正后的海马体积进行不同性别间两独立样本t检验。 结果 左、右侧海马体积与IVC呈正相关(r=0.55、0.49,P均<0.001)。经相除法校正后,左、右侧海马体积与IVC的相关性较校正前减低(左侧:r=－0.33,F=10.11,P<0.01;右侧r=－0.29,F=7.46,P<0.01)。经协方差法校正后,左、右侧海马体积与IVC无相关性(左侧:r=0.13,F=1.40,P=0.24;右侧:r=0.10,F=0.76,P=0.39)。1000名健康成年人左、右侧的海马原始体积在不同性别间差异有统计学意义(t=7.326、6.586,P均<0.001);采用相除法校正后的左、右侧海马体积在不同性别间的差异亦有统计学意义(t=－3.753、－3.287,P均<0.001);采用协方差法校正后的左、右侧海马体积在不同性别间的差异无统计学意义(左侧:t=－0.526,P=－0.179;右侧:t=－1.353,P=－0.600)。 结论 海马结构体积与IVC间存在明显相关关系,相除法和协方差法可以有效地对海马体积进行校正,有助于更客观地判断海马体积变化。     

1000名中国正常成人杏仁核体积高分辨力MRI测量

目的 基于高分辨力MRI测量中国汉族正常成人杏仁核体积,探讨杏仁核体积与年龄、性别的关系。方法 采用全国15家医院多中心临床研究形式,选取1000名中国健康成年受检者,按年龄分为5组:18~30岁(第1组)、31~40岁(第2组)、41~50岁(第3组)、51~60岁(第4组)及61岁以上(第5组),行大脑三维磁化强度预备梯度回波序列T1WI,应用三维体积分析软件测量杏仁核体积。采用方差分析比较不同年龄组杏仁核体积,t检验比较不同性别、侧别杏仁核体积。结果 ①杏仁核体积在总体样本及各组内男、女性间差异均有统计学意义(P均＜0.05),男性大于女性。②总体样本左、右杏仁核体积差异有统计学意义(P＜0.001),左侧高于右侧。③第1组、第2组及总体样本左侧杏仁核体积男性大于女性,第1组、第2组、第3组、第5组及总体样本右侧杏仁核体积男性大于女性,差异有统计学意义。④男性双侧杏仁核体积组间比较:第1组与第3~5组、第2组与第3~5组、第3组与第5组、第4组与第5组间差异均有统计学意义;女性:第1~4组与第5组间差异均有统计学意义。结论 高分辨力MRI能够清晰显示杏仁核形态,用于准确测量杏仁核体积,为建立中国汉族标准脑提供科学数据。     

中国汉族正常成人尾状核的高分辨率MRI测量

目的 测量中国汉族正常成人尾状核体积,为建立中国成人数字标准脑提供基础数据.方法 采用全国多中心临床研究形式,选取18～70岁健康志愿者1000名,按照年龄18～30、31～40、41～50、51～60、61～70岁进行分组,每组男、女各100名.所有受试者均行三维磁化强度预备梯度回波序列T1WI,应用三维体积分析软件手工勾绘ROI,测量尾状核的体积,探讨尾状核体积的性别、侧别差异及与年龄的相关关系.组间比较采用独立样本t检验,年龄与体积进行Pearson相关分析,左、右两侧对照使用配对t检验.结果 正常中国成人两侧尾状核体积之和为(10.973 ±1.647)cm3.男性左、右侧尾状核体积分别为(5.656±0.860)、(5.671±0.855)cm3,差异无统计学意义(t=1.230,P>0.05).女性左、右侧尾状核体积分别为(5.287±0.774)、(5.331±0.766)cm3,右侧大于左侧(t=3.999,P<0.01).相关性分析示男、女性的左、右侧尾状核体积均与年龄呈明显负相关(r值分别为-0.561、-0.568、-0.548、-0.552,P值均<0.05).结论 高分辨率MRI和三维体积分析软件可以准确测量尾状核的体积,为中国成人数字标准脑提供基础性数据.     

扣带回体积的标准化测量

目的 比较扣带回体积与校正因素的关系,为扣带回结构提供标准化的测量方法.方法 对627名18～60岁中国正常成年志愿者行全脑MR容积扫描,应用3D体积分析软件手工勾绘ROI,测量扣带回的体积,并分别以颅内容积(TIV)和脑体积(WBV)进行校正.对校正前、后的扣带回体积分别与TIV和WBV进行相关性分析.结果 校正前和TIV、WBV校正后的扣带回体积:男性分别为(21.01±2.31)ml、(21.11±2.57)ml、(21.06±2.34)ml,女性分别为(19.72±2.31)ml、(19.79±2.28)ml、(19.74±2.04)ml;左侧分别为(9.71±1.54)ml、(9.77±1.61)ml、(9.75±1.54)ml,右侧分别为(10.64±1.58)ml、(10.69±1.53)ml、(10.67±1.45) ml.校正前的扣带回体积与TIV的相关性不强(男、女:r=0.225、0.385;左、右侧:r=0.229、0.366;P均＜0.05),与WBV的相关性略高(男、女:r=0.329、0.473;左、右侧:r=0.381、0.419;P均＜0.05);校正后的扣带回体积与TIV仍有相关性(男、女:r=-0.378、-0.379;左、右侧:r=-0.368、-0.300;P均＜0.05),与WBV相关性降低(男、女:r=-0.297、-0.156;左、右侧:r=-0.285、-0.197;P均＜0.05).结论 扣带回体积与TIV和WBV均有一定相关性;WBV校正效果优于TIV.     

大脑视觉皮层功能定位的初步研究

目的：使用功能磁共振成像（ｆＭＲＩ）技术，探测大脑视皮层血氧水平的功能信号。材料与方法：对５例正常志愿者激发视觉系统，使用ＥＰＩ（回波－平面成像）序列进行“刺激”和“静止”两种对比条件下的Ｔ２＊成像，进行ｔ检验方法的统计分析。结果：成功地在所有志愿者的视皮层获得了ｆＭＲＩ信号及其相应的时间过程曲线，以充分对照的数据做出国内首批视皮层ｆＭＲＩ影像。结论：使用ｆＭＲＩ进行视皮层和其他脑组织的功能性研究现实可行，且极有发展前途。     

中国汉族正常成人海马体积的高分辨率MRI测量

Objective To measure the volume of hippoeampal formation(HPF) in healthy Chinese Han adults and provide database for researching on a variety of diseases associated with alteration of hippocampal structure. Methods This is a clinical multi-center study. One thousand Chinese healthy volunteers (age range = 18 to 70) recruited from 15 hospitals were divided into 5 groups, i. e. , Group A (age range = 18 to 30), B (age range =31 to40), C (age range =41 to 50), D (age range=51 to 60),and E (age range =61 to 70). Each group contained 100 males and 100 females. All of the volunteers were scanned by MR using T1 weighted three-dimensional magnetization prepared rapid acquisition gradient echo sequence. The margin of HPF were outlined manually for each side. Using multiple linear regression,relationships between hippocampal volume and sex, age, weight and height were analyzed respectively.Independent two sample t test was used to study the differences between male and female and between lcft and right. The differences of hippoeampal volume among age groups were analyzed by ANOVA. Results Hippocampal volume for left and right side were (4752 ± 659) and (5032 ± 660) mm3 respectively. The volume of HPF is significant correlated with gender and age, but without relevance to height and weight ( left and right r = 0. 283,0. 311, F = 30. 127,37. 050 ,P < 0. 01 ). The volumes of left and right hippocampus were (4897 ± 670), (5192 ± 667)mm3 respectively for men, and (4647 ± 624) and (4904 ± 630) mm3 for women. The right hippocampal volume was larger than the left ( t = 7. 030,6. 696, P < 0. 05 ). On both sides, men have larger hippocampus than that of women ( t = 6. 586,7. 326, P < 0. 01 ). The volumes of the left hippocampus among the five age groups in the male were (4981 ± 684), ( 5003 ± 609 ), (4976 ± 657 ),(4841 ± 631 ), (4631 ± 681 ) mm3 respectively, while the volumes of the right hippoeampus were (5340 ±647) ,(5276 ±582), (5264 ±620), (5133 ±661 ), (4894 ±699) mm3 respectively. Among age groups,the differences were statistically significant ( left and right F = 5. 737,7. 607, P < 0. 01 ). For male, there was significant difference of bilateral hippoeampus between the 18-30, 31-40, 41-50 years group and 61-70 years group ( P < 0. 05 ) and there was no significant difference among the other groups ( P > 0. 05 ).There was no significant difference of hippocampal among different groups in women (P > 0. 05 ).Conclusions With high-resolution MRI, the volume of the HPF was accurately measured, so as to provide the basic data for research of the hippocampus-related disease.