An anatomical study of normal meniscal roots with isotropic 3D MRI at 3 T

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• 作者：A-Hong Ren^a ; ^b ; ¹ ; ^{renahong@126.com} ; Zhuo-Zhao Zheng^a ; ^{zzhuozhao@yahoo.com.cn} ; Yao Shang^a ; ² ; ^{erna_7@live.cn} ; Chun-Yan Tian^a ; ² ; ^{tcyzhs@yahoo.com.cn}
• 关键词：ARMM ; anterior root of medial meniscus ; PRMM ; posterior root of medial meniscus ; ARLM ; anterior root of lateral meniscus ; PRLM ; posterior root of lateral meniscus ; MRT ; meniscal root tear ; PDW ; proton density-weighted ; SPACE ; Sampling Perfection with Appl
• 刊名：European Journal of Radiology
• 出版年：2012
• 期刊代码：93_0720048x
• 类别：med
• 出版时间：July, 2012
• 卷：81
• 期：7
• 页码：e783-e788
• 文件大小：707 K

摘要

Objectives

To clarify the morphological features of normal meniscal roots on magnetic resonance (MR) imaging with an isotropic 3D proton density-weighted (PDW) sequence.

Materials

3D PDW MR was performed in sixty-two patients at 3 T before knee arthroscopy. MR images of 34 normal medial menisci and 33 intact lateral menisci confirmed by arthroscopy were retrospectively evaluated. MR signals, insertion sites, dimensions and courses of four meniscal roots were recorded.

Results

The anterior root of medial meniscus (ARMM) was typically hypointense, while the posterior root of medial meniscus (PRMM) and the anterior root of lateral meniscus (ARLM) were prone to be hyperintense or showing a comblike signal, and the posterior root of lateral meniscus (PRLM) was usually hypointense or comblike on PDW MR images. ARMM and PRLM had more complex and diverse insertion patterns than ARLM and PRMM. There were significant statistical differences of the lengths, widths, heights and course angles among four meniscal roots (all P < 0.001).

Conclusions

The signal intensity of each meniscal root can be hypointense, hyperintense, or comblike on 3D PDW MR images. ARMM and PRLM have more complex and diverse insertion patterns than ARLM and PRMM. The dimensions and courses of four meniscal roots all differ.