中国组织工程研究 ›› 2020, Vol. 24 ›› Issue (27): 4333-4337.doi: 10.3969/j.issn.2095-4344.2799

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

基于序列优化的T2-mapping定量成像技术评价踝关节距骨骨软骨损伤

李  伟1,初占飞2,于泽晨2,于静红1,贾岩波3,王宗博1   

  1. 内蒙古医科大学第二附属医院,1影像科,3运动医学外科,内蒙古自治区呼和浩特市  010030;2西门子医疗系统有限公司,上海市  201318
  • 收稿日期:2020-01-18 修回日期:2020-01-20 接受日期:2020-03-04 出版日期:2020-09-28 发布日期:2020-09-09
  • 通讯作者: 于静红,主任医师,内蒙古医科大学第二附属医院影像科,内蒙古自治区呼和浩特市 010030
  • 作者简介:李伟,男,1982年生,内蒙古自治区通辽市人,蒙古族,硕士,副主任医师,主要从事骨肌系统影像方面的研究。
  • 基金资助:
    内蒙古自治区自然科学基金(2018MS08024);内蒙古自治区科技计划项目(2019GG053) 

T2-mapping quantitative imaging technique based on sequence optimization in the ankle talus osteochondral injury

Li Wei1, Chu Zhanfei2, Yu Zechen2, Yu Jinghong1, Jia Yanbo3, Wang Zongbo1   

  1. 1Department of Imaging, 3Department of Sports Medical Surgery, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongolia Autonomous Region, China; 2Siemens Healthineers Co., Ltd., Shanghai 201318, China
  • Received:2020-01-18 Revised:2020-01-20 Accepted:2020-03-04 Online:2020-09-28 Published:2020-09-09
  • Contact: Yu Jinghong, Chief physician, Department of Imaging, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongolia Autonomous Region, China
  • About author:Li Wei, Master, Associate chief physician, Department of Imaging, Second Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010030, Inner Mongolia Autonomous Region, China
  • Supported by:
    the Natural Science Foundation of Inner Mongolia Autonomous Region, No. 2018MS08024; the Science and Technology Program of Inner Mongolia Autonomous Region of China, No. 2019GG053

摘要:

文题释义:

距骨软骨损伤:指距骨关节面软骨或软骨连同部分软骨下骨的剥脱或骨折,多表现为局部关节软骨剥脱,并可累及深部的软骨下骨,其包括距骨剥脱性骨软骨炎、距骨骨软骨骨折、距骨骨软骨缺损等,这些疾病在症状、体征、治疗原则、方法及影像学表现上不易区分,故统一纳入距骨骨软骨损伤的行列。

T2mappingT2-mapping成像是通过测量磁共振T2弛豫时间来定量分析关节软骨内组织成分的变化,可形象显示软骨内部T2值,是国内外研究应用较为广泛、成熟的软骨磁共振生理性成像技术。大部分学者认为关节软骨的T2值取决于胶原含量、排列方向及软骨内水的含量。

背景:目前科研、临床常用软骨功能成像序列有DWI、DTI、T1-mapping、T2-mapping、T2*-mapping等,其中T2-mapping常用于软骨定量分析中,然而因其扫描时间过长、受检者体验差导致常规开展该技术明显受限。

目的应用序列优化的磁共振T2-mapping定量成像技术评价慢性外侧踝关节不稳患者的距骨软骨损伤程度。

方法纳入于内蒙古医科大学第二附属医院就诊的53例慢性外侧踝关节不稳患者(病例组),同时纳入46例非慢性外侧踝关节不稳患者作为对照,均行磁共振常规扫描和优化的T2-mapping定量成像扫描,将距骨软骨分为内侧前、中、后部及外侧前、中、后部共计6个分区,每个分区取1T2值,内、外侧分区共计6T2值。试验获得内蒙古医科大学伦理委员会审核批准。

结果与结论:病例组的内侧前部、内侧中部、内侧后部软骨区域的平均T2值均高于对照组(P < 0.05),外侧区前、中、后部软骨区域的平均T2值与对照组比较差异无显著性意义(P > 0.05)。结果表明,慢性外侧踝关节不稳患者的距骨软骨损伤主要发生于距骨内侧,磁共振T2-mapping成像技术能够定量测定软骨损伤程度,优化后的T2-mapping功能成像常规扫描成为可能。

ORCID: 0000-0002-3968-0029(李伟)

中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱;骨折;内固定;数字化骨科;组织工程

关键词: 磁共振成像, 距骨骨软骨, 踝关节, T2-mapping, 慢性外侧踝关节不稳, 序列优化, 关节镜

Abstract:

BACKGROUND: At present, DWI, DTI, T1-mapping, T2-mapping, and T2*-mapping are commonly used in cartilage functional imaging sequences in both scientific research and clinic. T2-mapping is often used for the quantitative analysis of cartilage, but it was obviously limited due to the long scanning time and poor experience of the patient.

OBJECTIVE: To quantitatively evaluate the talar cartilage injury degree of chronic lateral ankle instability patients by sequence optimized T2-mapping quantitative imaging technique.

METHODS: Totally 53 cases of chronic ankle instability (case group) and 46 healthy subjects (control group) were from the Second Affiliated Hospital of Inner Mongolia Medical University. They underwent conventional Magnetic Resonance Imaging and optimal T2-mapping quantitative imaging scanning. The total talar cartilage was divided into six compartments: internal anterior, internal medial, internal posterior, lateral anterior, lateral center and lateral posterior. Six T2 values were totally taken as each partition had one T2 value. The experiment was approved by the Ethics Committee of Inner Mongolia Medical University.

RESULTS AND CONCLUSION: The T2 values of internal anterior, internal medial, internal posterior areas of case group were higher than those of control group (P < 0.05). The T2 values of lateral anterior, lateral center and lateral posterior areas had no significant difference between the two groups (P > 0.05). The results showed that the talus cartilage injury mainly occurred in the internal talus in patients with chronic lateral ankle instability. The cartilage damage degree could be quantitatively evaluated by magnetic resonance T2-mapping imaging technique. It is possible that T2-mapping based on sequence optimization can be used in functional image routine scan. 

Key words: magnetic resonance imaging, talus osteochondral, ankle, T2-mapping, chronic lateral ankle instability, sequence optimization, arthroscope

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