当前位置:首页>南京>南京中医药大学连云港附属医院李宗、许开喜团队丨脑小血管病总负荷与脑萎缩关系的MRI研究

南京中医药大学连云港附属医院李宗、许开喜团队丨脑小血管病总负荷与脑萎缩关系的MRI研究

  • 2026-05-18 07:08:48
南京中医药大学连云港附属医院李宗、许开喜团队丨脑小血管病总负荷与脑萎缩关系的MRI研究

【导语】

脑小血管病(CSVD)作为全脑性疾病,其总负荷评分能否精准反映脑实质的微观改变?南京中医药大学连云港附属医院李宗、许开喜团队在《中国临床医学影像杂志》2026年刊中发表最新成果。研究团队利用联影uAI Research Portal对253例患者的18个核心脑区进行了全自动定量分割,首次通过大样本数据证实:随着CSVD总负荷评分的增加,不仅大脑灰白质萎缩,小脑及脑干体积亦呈进行性减小,且总负荷评分对脑萎缩的预测价值优于单一影像标志物。

【核心内容】

📌 研究背景与痛点

  • 评估局限: 传统CSVD评估多关注单一标志物(如白质高信号),难以全面反映疾病全貌;临床常用的目测法评估脑萎缩主观性强,无法量化早期微小变化。

  • 科学假设: CSVD总负荷评分是否能更好地反映全脑结构的退行性改变?这种改变是否累及幕下结构(小脑、脑干)?

🔬 研究方法与技术细节

  • 研究队列与分组:

    • 样本量: 回顾性分析253例因头晕、记忆力减退就诊的患者。

    • 分组标准: 依据CSVD总负荷评分(0~4分)分为5组:0分(70例)、1分(55例)、2分(49例)、3分(38例)、4分(41例)。

    • 严格控制混杂因素: 排除了大面积脑梗死、脑出血、阿尔茨海默病、帕金森病及颅内大动脉狭窄>50%的患者,确保萎缩由CSVD引起。

  • MRI扫描方案:

    • 设备: 联影uMR790 3.0T磁共振。

    • 关键序列: 高分辨率3D-T1WI(层厚1mm),用于精细脑结构分割。

  • AI定量分析:

    • 工具: 联影uAI Research Portal图像分析工具。

    • 算法: 基于深度学习模型VB-Nets,Dice相似度达92%。

    • 指标: 自动分割并计算18个脑区体积(涵盖皮质、皮质下、幕下结构)。

📊 主要结果与数据解读

1. 不同CSVD总负荷评分下的脑区体积变化(cm³)

单因素方差分析显示,各组间脑区体积差异均具有显著统计学意义(P均<0.001)。数据表明,随着评分升高,脑体积呈“阶梯式”下降:

脑区

0分 (n=70)

1分 (n=55)

2分 (n=49)

3分 (n=38)

4分 (n=41)

变化趋势

脑灰质

633.86±59.61

594.06±42.37

566.98±31.81

535.45±29.87

489.72±37.58

持续显著减小

脑白质

513.58±58.95

487.54±49.33

457.32±46.20

437.36±36.37

400.18±40.11

持续显著减小

海马

6.79±0.75

6.43±0.50

6.17±0.72

5.66±0.51

5.17±0.64

持续显著减小

小脑灰质

103.53±10.78

97.86±9.15

92.53±7.78

87.40±9.44

82.31±7.41

持续显著减小

脑桥

15.78±1.70

14.59±1.76

13.82±1.73

11.79±1.17

10.15±1.36

持续显著减小

2. 偏相关分析(控制年龄因素)

研究证实,CSVD总负荷评分与所有被测脑区体积均呈显著负相关(P均<0.001):

  • 最强相关性: 脑灰质 (r = -0.566)、海马 (r = -0.451)、大脑白质 (r = -0.442)。

  • 单项对比: 总负荷评分的相关性普遍高于LPVO(腔隙)、WMH(白质高信号)、BG-PVS(血管周围间隙)及CMB(脑微出血)等单一评分,证明综合评分更能反映脑萎缩的真实程度。

💡 深度讨论与临床启示

  1. 全脑受累的证据: 研究不仅观察到幕上结构(额叶、顶叶等)萎缩,还首次量化证实了小脑、中脑、脑桥体积随CSVD负荷增加而减小。这提示CSVD可能通过“皮层-脑桥-小脑通路”的中断导致远隔效应。

  2. 白质损伤的早期预警: 研究发现胼胝体、扣带回等白质区域在尚未形成显著Fazekas高信号时,体积已开始显著减小。这表明脑体积测量可能是比传统WMH分级更敏感的隐匿性损伤指标。

  3. AI推动精准影像: 联影uAI平台实现了从“经验目测”到“微米级定量”的跨越,为放射科开展大样本神经影像研究提供了标准化工具。

【原文信息】

  • 标题: 脑小血管病总负荷与脑萎缩关系的MRI研究

  • 作者: 李宗, 许开喜 (南京中医药大学连云港附属医院 连云港市中医院放射科)

  • 基金项目: 连云港市中医药科技发展计划重点项目(编号ZD202207)

  • 期刊: 中国临床医学影像杂志, 2026, 37(1): 1-5

  • DOI: 10.12117/jccmi.2026.01.001

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  1. CONNECT:[ UseTime:0.000715s ] mysql:host=127.0.0.1;port=3306;dbname=b460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000678s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000323s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000280s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000630s ]
  6. SELECT * FROM `set` [ RunTime:0.000567s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000529s ]
  8. SELECT * FROM `article` WHERE `id` = 542792 LIMIT 1 [ RunTime:0.000359s ]
  9. UPDATE `article` SET `lasttime` = 1779253775 WHERE `id` = 542792 [ RunTime:0.000822s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 65 LIMIT 1 [ RunTime:0.000238s ]
  11. SELECT * FROM `article` WHERE `id` < 542792 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000523s ]
  12. SELECT * FROM `article` WHERE `id` > 542792 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000907s ]
  13. SELECT * FROM `article` WHERE `id` < 542792 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001788s ]
  14. SELECT * FROM `article` WHERE `id` < 542792 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001076s ]
  15. SELECT * FROM `article` WHERE `id` < 542792 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001239s ]
0.172645s