METHODS: Patients with suspected traumatic dislocation of the shoulder (n = 46, mean age 40 ± 14.5 years, 19 women) were prospectively recruited and received 3-T MR imaging including 3D T1 GRE, UTE, and 3D FRACTURE sequences. CT was performed in patients with acute fractures and served as standard of reference (n = 25). Agreement of morphological features between the modalities was analyzed including the glenoid bone loss, Hill-Sachs interval, glenoid track, and the anterior straight-line length. Agreement between the modalities was assessed using Bland-Altman plots, Student\'s t-test, and Pearson\'s correlation coefficient. Inter- and intrareader assessment was evaluated with weighted Cohen\'s κ and intraclass correlation coefficient.
RESULTS: All osseous pathologies were detected accurately on all three CT-like sequences (n = 25, κ = 1.00). No significant difference in the percentage of glenoid bone loss was found between CT (mean ± standard deviation, 20.3% ± 8.0) and CT-like MR images (FRACTURE 20.6% ± 7.9, T1 GRE 20.4% ± 7.6, UTE 20.3% ± 7.7, p > 0.05). When comparing the different measurements on CT-like images, measurements performed using the UTE images correlated best with CT.
CONCLUSIONS: Assessment of bony Bankart lesions and other osseous pathologies was feasible and accurate using CT-like images based on 3-T MRI compared with conventional CT. Compared to the T1 GRE and FRACTURE sequence, the UTE measurements correlated best with CT.
CONCLUSIONS: In an acute trauma setting, CT-like images based on a T1 GRE, UTE, or FRACTURE sequence might be a useful alternative to conventional CT scan sparing associated costs as well as radiation exposure.
CONCLUSIONS: • No significant differences were found for the assessment of the glenoid bone loss when comparing measurements of CT-like MR images with measurements of conventional CT images. • Compared to the T1 GRE and FRACTURE sequence, the UTE measurements correlated best with CT whereas the FRACTURE sequence appeared to be the most robust regarding motion artifacts. • The T1 GRE sequence had the highest resolution with high bone contrast and detailed delineation of even small fractures but was more susceptible to motion artifacts.
方法:怀疑肩关节外伤性脱位的患者(n=46,平均年龄40±14.5岁,19名妇女)前瞻性招募并接受3-TMR成像,包括3DT1GRE,UTE,和3D断裂序列。对急性骨折患者进行CT检查,并作为参考标准(n=25)。分析了模态之间的形态学特征的一致性,包括关节盂骨丢失,希尔-萨克斯间隔,关节盂滑轨,和前面的直线长度。使用Bland-Altman地块评估了模式之间的协议,学生t检验,和皮尔逊相关系数。采用加权Cohenκ和组内相关系数对行间和行内评估进行评估。
结果:在所有三个CT样序列(n=25,κ=1.00)上都能准确检测到所有骨性病变。CT之间的关节盂骨丢失百分比没有显着差异(平均值±标准偏差,20.3%±8.0)和CT样MR图像(骨折20.6%±7.9,T1GRE20.4%±7.6,UTE20.3%±7.7,p>0.05)。比较类似CT图像的不同测量结果时,使用UTE图像进行的测量与CT最佳相关。
结论:与常规CT相比,使用基于3-TMRI的CT样图像评估骨性Bankart病变和其他骨性病变是可行且准确的。与T1GRE和断裂序列相比,UTE测量值与CT相关性最好。
结论:在急性创伤环境中,基于T1GRE的CT样图像,UTE,或断裂序列可能是一个有用的替代传统的CT扫描节省相关的成本以及辐射暴露。
结论:•将CT样MR图像的测量值与常规CT图像的测量值进行比较,对于关节盂骨丢失的评估没有发现显著差异。•与T1GRE和断裂序列相比,UTE测量值与CT的相关性最好,而对于运动伪影,骨折序列似乎是最健壮的。•T1GRE序列具有最高的分辨率,具有高骨对比度和甚至小骨折的详细描绘,但更容易受到运动伪影的影响。