中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (36): 5836-5840.doi: 10.3969/j.issn.2095-4344.1999

• 骨与关节图像与影像 bone and joint imaging • 上一篇    下一篇

硫酸钡灌注联合micro-CT扫描实现大鼠颈脊髓微血管的三维可视化和量化分析

刘雅普1,2,林俊育1,杨  舟1,吴秀华1,吴晓亮1,朱青安1
  

  1. 1南方医科大学附属南方医院脊柱外科,广东省广州市  510515;2漯河医学高等专科学校第二附属医院脊柱外科,河南省漯河市  462300
  • 出版日期:2019-12-28 发布日期:2019-12-28
  • 通讯作者: 朱青安,博士,教授,南方医科大学附属南方医院脊柱外科,广东省广州市 510515
  • 作者简介:刘雅普,男,1985年生,河南省禹州市人,汉族,南方医科大学毕业,博士,主治医师,主要从事脊髓损伤方面的研究。
  • 基金资助:

    国家自然科学基金(81472084),项目负责人:朱青安|国家自然科学基金(81601904),项目负责人:吴晓亮|漯河市青年拔尖人才项目(2018QNBJRC01004),项目负责人:刘雅普

Three-dimensional visualization and quantitative analysis of microvessels in rat cervical spinal cord using barium sulfate perfusion combined with micro-CT scanning

Liu Yapu1, 2, Lin Junyu1, Yang Zhou1, Wu Xiuhua1, Wu Xiaoliang1, Zhu Qing’an1
  

  1. 1Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China; 2Department of Spinal Surgery, Second Affiliated Hospital of Luohe Medical College, Luohe 462300, Henan Province, China
  • Online:2019-12-28 Published:2019-12-28
  • Contact: Zhu Qing’an, MD, Professor, Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • About author:Liu Yapu, MD, Attending physician, Department of Spinal Surgery, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China; Department of Spinal Surgery, Second Affiliated Hospital of Luohe Medical College, Luohe 462300, Henan Province, China
  • Supported by:

    the National Natural Science Foundation of China, No. 81472084 (to ZQA)| the National Natural Science Foundation of China, No. 81601904 (to WXL)| the Luohe Youth Talents Fund of China, No. 2018QNBJRC01004 (to LYP)

摘要:

文章快速阅读:
 
 
 
文题释义:
Micro-CT:是一种分辨率极高的CT设备,通过锥形X射线束扫描重建后,可实现样本内部显微结构的清晰显示,分辨率达到微米级,通过软件辅助可细致分析样本内部不同截面的信息。
三维可视化:是描绘和理解模型的一种手段,是数据体的一种表征形式,以大量数据为基础,检查研究对象的连续性,发现并提出异常,为分析、理解及重复数据提供依据。
 
摘要
背景:血管结构是维持颈脊髓功能的重要基础,为了评估微血管在颈脊髓损伤及治疗过程中的参与程度,首先需要对正常颈脊髓微血管结构进行良好的三维可视化和精确的量化分析,但目前相关研究报道较少。
目的:探讨硫酸钡灌注联合micro-CT扫描对大鼠正常颈脊髓微血管结构的三维可视化和量化分析效果,为后期评估微血管在颈脊髓损伤中的参与程度及衡量治疗效果奠定基础。
方法:实验纳入5只成年雄性SD大鼠,体质量280-320 g,所有动物操作程序均根据国家相关实验动物使用准则施行,并获得南方医科大学动物使用伦理委员会的批准。大鼠深度麻醉后,经心脏穿刺使用温肝素生理盐水、多聚甲醛、硫酸钡灌注剂进行血管灌注,取颈脊髓组织置于micro-CT中进行扫描及三维重建,量化分析血管体积与组织体积比值、血管表面积与组织体积比值、血管数目、血管直径、血管分离度、连接密度、结构模型指数以及不同直径微血管的数量、百分比及体积等指数。

结果与结论:①颈脊髓微血管经三维重建可视化后,颈脊髓内微血管结构清晰可见,可以清晰显示出颈脊髓的前、后动脉以及几级分支动脉;②通过量化分析微血管指数,结果显示,血管体积与组织体积比值为0.022±0.002,血管表面积与组织体积比值为(52.370±6.271) mm-1、血管数目为(0.604±0.076) mm-1、血管直径为(0.040±0.005) μm、血管分离度为(1.762±0.255) μm、连接密度为(2.661±0.757) mm-3、结构模型指数为4.400±0.129,并成功量化了不同直径颈脊髓微血管的数量、百分比及体积等;③结果表明,硫酸钡灌注联合micro-CT扫描可实现对大鼠正常颈脊髓微血管结构良好的三维可视化和精确的量化分析,为后期评估微血管在颈脊髓损伤过程中的参与程度及衡量治疗效果奠定了良好基础。

关键词: 微血管, 颈脊髓, 三维可视化, 量化分析, 大鼠, 国家自然科学基金

Abstract:

BACKGROUND: Vascular structure is an important basis for maintaining cervical spinal cord function. To evaluate the involvement of microvessels in cervical spinal cord injury and treatment, it is necessary to carry out a good three-dimensional visualization and accurate quantitative analysis of the normal cervical spinal cord microvascular structure, but there are few reports about it.

OBJECTIVE: To investigate the three-dimensional visualization and quantitative analysis of normal cervical spinal cord microvascular structure in rats by barium sulfate perfusion combined with micro-CT scanning, and to lay a foundation for the later evaluation of the involvement degree of microvessels in cervical spinal cord injury and the measurement of therapeutic effect.
METHODS: Five adult male SD rats weighing 280-320 g were included. All animal operation procedures were implemented in accordance with the relevant national guidelines for the use of laboratory animals, and were approved by the Animal Use Ethics Committee of Southern Medical University. After rats were deeply anesthetized, vascularization was performed with warm heparin normal saline, polyformaldehyde and barium sulfate perfusion through cardiac puncture. Cervical spinal cord tissue was taken and placed in micro-CT for scanning and three-dimensional reconstruction. Quantitative analysis of the ratio of microvascular volume to tissue volume, ratio of vascular surface area to tissue volume, number of blood vessels, diameter of blood vessels, separation degree of blood vessels, connectivity density, structural model index and the number, percentage and volume of microvessels with different diameters were quantitatively analyzed.
RESULTS AND CONCLUSION: (1) After three-dimensional reconstruction and visualization, the microvascular structure in the cervical spinal cord was clearly visible, showing the anterior and posterior arteries of the cervical spinal cord as well as several branch arteries. (2) Quantitative analysis results of microvascular index showed that ratio of microvascular volume to tissue volume was 0.022±0.002; ratio of vascular surface area to tissue volume was (52.370±6.271) mm-1; number of blood vessels was (0.604±0.076) mm-1; diameter of blood vessels was (0.040±0.005) μm; separation degree of blood vessels was (1.762±0.255) μm; connectivity density was (2.661±0.757) mm-3; structural model index was (4.400±0.129). The number, percentage and volume of microvessels in cervical spinal cord with different diameters were quantified successfully. (3) Barium sulfate perfusion combined with micro-CT scanning can achieve three-dimensional visualization and accurate quantitative analysis of normal cervical spinal cord microvascular structure in rats, laying a good foundation for the later evaluation of the involvement of microvessels during cervical spinal cord injury and the measurement of therapeutic effect.

Key words: microvessels, cervical spinal cord, three-dimensional visualization, quantitative analysis, rats, the National Natural Science Foundation of China

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