Magnetic resonance imaging evaluation of acetabular orientation in normal Chinese children.
Magnetic resonance imaging evaluation of acetabular orientation in normal Chinese children.
复制标题
中国正常儿童髋臼方位的磁共振成像评估
DOI：
10.1097/md.0000000000004878
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发表时间：
2016-09
期刊：
影响因子：
1.6
通讯作者：
Xie D
中科院分区：
文献类型：
--
作者：
Li Y;Liu Y;Zhou Q;Chen W;Li J;Yu L;Xu H;Xie D
摘要磁共振成像（MRI）上髋臼方位的相关资料尚不多见，本研究探讨了正常儿童髋臼方位随年龄的变化。我们回顾性分析了2009年1月至2015年12月在我院接受髋关节MRI检查的儿童的病历。共纳入180例髋关节MRI阅读正常的患者，并根据年龄分为14组：从6个月大，然后每年从1岁到16岁。测量骨和软骨髋臼前倾角（AAA）、髋臼倾角（AIA）和髋臼指数（AI）。测量轴位全股骨头覆盖角（a-TCA）和冠状位全股骨头覆盖角（c-TCA）。平均骨性AAA和AIA分别为12.2 ± 2.5°和50.9 ± 2.5°;两者在6个月至16岁期间保持不变。 软骨AAA（12.1 ± 2.5°）和AIA（41.2 ± 3.0°）的结果相似。 骨与软骨AAA之间无差异，但骨AIA明显大于软骨AIA。6月龄时骨AI为24.1 ±2.4°， 12 ~ 13岁时降至12.5±2.3°;软骨AI（5.9 ± 1.7°）随年龄增长保持稳定值。 6个月时的平均骨性a-TCA和c-TCA分别为117.0 ± 5.8°和127.5 ± 5.1°，16岁时增加至144.5± 4.6°和140.7 ±2.5°。 而软骨a-TCA（145.2 ± 7.2°）和c-TCA（154.1 ± 5.7°）随年龄变化不明显。 在中国正常儿童中，骨和软骨AAA和AIA在16岁之前保持恒定。虽然髋臼对股骨头的软骨覆盖率随年龄增长而保持不变，但股骨头的骨覆盖率随年龄增长而增加。
Abstract There are no data regarding the acetabular orientation on magnetic resonance imaging (MRI); this study investigates the changes of acetabular orientation with age in normal Chinese children. We retrospectively analyzed the medical records of children who underwent hip MRI examination at our hospital from January 2009 to December 2015. A total of 180 patients with normal MRI reading of the hip joints were included and were divided into 14 groups according to age: from 6 months of age and then for each year from 1 to 16 years. The bony and cartilage acetabular anteversion angle (AAA), acetabular inclination angle (AIA), and acetabular index (AI) were measured. Total bony and cartilage femoral head coverage angles were measured on axial section total femoral head coverage angle (a-TCA) and coronal section total femoral head coverage angle (c-TCA). The mean bony AAA and AIA were 12.2 ± 2.5° and 50.9 ± 2.5°, respectively; both of them stayed constant from the age of 6 months to 16 years. Similar results were found in cartilage AAA (12.1 ± 2.5°) and AIA (41.2 ± 3.0°). There was no difference between bony and cartilage AAA, but bony AIA was significantly larger than cartilage AIA. Bony AI was 24.1 ± 2.4° at the age of 6 months, decreasing to 12.5 ± 2.3° by 12 to 13 years of age; cartilage AI (5.9 ± 1.7°) maintained a steady value with age. The mean bony a-TCA and c-TCA at 6 months were 117.0 ± 5.8° and 127.5 ± 5.1°, increasing to 144.5 ± 4.6° and 140.7 ± 2.5° at the age of 16 years. However, the cartilage a-TCA (145.2 ± 7.2°) and c-TCA (154.1 ± 5.7°) did not change significantly with age. Both bony and cartilage AAA and AIA remain constant up to the age of 16 years in normal Chinese pediatric population. Although the cartilage coverage of femoral head by the acetabulum remains unchanged with age, the bony coverage of femoral head increases.