Objective: To explore the quantitative value of the T2mapping sequence in evaluating the early glenohumeral joint cartilage injury. Methods: A total of 92 patients with shoulder joint pain who underwent routine sequence and T2mapping sequence scanning in General Hospital of Ningxia Medical University from March 2023 to March 2024 were retrospectively collected as a case group. The patients were classified into tendinitis group, partial tear group and full tear group according to the degree of tendon injury. Another 25 healthy subjects of the same age were selected as the control group. Two physicians divided articular cartilage into upper, middle, and lower subregions in the T2mapping sequence and measured T2 values in each subregion. The intra-observer correlation coefficient (ICC) was employed to evaluate the inter-observer and intra-observer consistency. Independent sample t test was utilized to compare the T2 values of different subregions between the two groups. One-way analysis of variance was used to compare the T2 values of different subregions among the groups, and pairwise comparison was conducted using the Bonferroni test. Spearman correlation analysis was conducted to analyze the correlation between the T2 values in different subregions of the articular cartilage and the injury degree of the supraspinatus tendon. Results: There were 44 males and 48 females in the case group, with an age range of 38 to 60 (51.4±5.8) years; there were 32 cases in the tendonitis group, 33 cases in the partial tear group, and 27 cases in the full tear group. There were 11 males and 14 females in the control group, with an age range of 40 to 54 (49.1±3.9) years. The T2 values of the upper, middle, and lower subregions of the glenohumeral articular cartilage in the case group were (37.8±4.9) ms, (39.1±5.9) ms, and (42.1±5.1) ms, respectively, all of which were significantly higher than those in the control group [(29.4±3.3) ms, (31.7±5.0) ms, and (36.3±6.2) ms, respectively] (all P<0.001). Within the supraspinatus tendon full tear group, the T2 values were (40.2±5.7) ms, (41.2±5.4) ms, and (43.4±4.1) ms, respectively, all of which exceeded those in the partial tear group [(38.2±4.3) ms, (38.9±6.5) ms, (43.1±5.1) ms, respectively], which were also higher than those in the tendonitis group [(35.0±3.2) ms, (37.7±5.0) ms, (40.1±4.5) ms, respectively] and the control group [(29.4±3.3) ms, (31.7±5.0) ms, (36.3±6.2) ms, respectively] (all P<0.001). Statistically significant differences in T2 values were observed between different subregions of articular cartilage in both the tendonitis and partial tear groups (all P<0.05); however, no significant differences were found among the upper, middle, and lower subregions in the full tear group (P=0.140). Furthermore, the T2 values in the upper, middle, and lower subregions of articular cartilage exhibited a positive correlation with the degree of supraspinatus muscle injury (r=0.693, 0.515, and 0.449, respectively, all P<0.001). Conclusions: The T2mapping sequence can quantitatively assess the degree of articular cartilage damage, and the degree of supraspinatus tendon damage and glenohumeral joint cartilage damage is positively correlated.
目的： 探讨磁共振T2mapping序列定量评估盂肱关节早期软骨损伤程度的价值。 方法： 回顾性收集2023年3月至2024年3月因肩关节疼痛在宁夏医科大学总医院行肩关节磁共振常规序列及T2mapping序列扫描的患者92例作为病例组。按照冈上肌腱损伤程度将患者分为肌腱炎组、部分撕裂组、完全撕裂组。另选择年龄相当的健康体检者25位，作为对照组。两名医师分别在磁共振T2mapping序列上将盂肱关节软骨分为上、中、下亚区，并测量各亚区的T2值。独立样本t检验比较对照组与病例组不同亚区T2值的差异，采用单因素方差分析比较各组间不同亚区T2值的差异，Spearman相关分析观察关节软骨不同亚区T2值与冈上肌腱损伤程度的相关性。 结果： 病例组男44例，女48例，年龄38~60（51.4±5.8）岁；肌腱炎组32例，部分撕裂组33例，完全撕裂组27例。对照组男11位，女14位，年龄40~54（49.1±3.9）岁。病例组盂肱关节软骨上、中、下亚区的T2值分别为（37.8±4.9）、（39.1±5.9）、（42.1±5.1）ms，均高于对照组的（29.4±3.3）、（31.7±5.0）、（36.3±6.2）ms（均P<0.001）。冈上肌腱完全撕裂组盂肱关节软骨的上、中、下亚区T2值（40.2±5.7）、（41.2±5.4）、（43.4±4.1）ms，均高于部分撕裂组［（38.2±4.3）、（38.9±6.5）、（43.1±5.1）ms］，亦高于肌腱炎组［（35.0±3.2）、（37.7±5.0）、（40.1±4.5）ms］和健康对照组［（29.4±3.3）、（31.7±5.0）、（36.3±6.2）ms］（均P<0.001）。肌腱炎组、部分撕裂组关节软骨不同亚区之间T2值差异亦均有统计学意义（均P<0.05），而完全撕裂组上、中、下亚区之间T2值差异无统计学意义（P=0.140）。关节软骨上、中、下亚区T2值与冈上肌损伤程度呈正相关（r=0.693、0.515、0.449，均P<0.001）。 结论： 磁共振T2mapping序列能定量评估关节软骨损伤程度，冈上肌腱损伤程度与盂肱关节软骨损伤呈正相关。.