PDF(Pubmed)
Abstract：
OBJECTIVE: To evaluate and compare the diagnostic performance of CT-like images based on a 3D T1-weighted spoiled gradient-echo sequence (T1 GRE), an ultra-short echo time sequence (UTE), and a 3D T1-weighted spoiled multi-echo gradient-echo sequence (FRACTURE) with conventional CT in patients with suspected osseous shoulder pathologies.
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.
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.
摘要：
目的：为了评估和比较基于3DT1加权破坏的梯度回波序列（T1GRE）的类似CT图像的诊断性能，超短回波时间序列(UTE)，以及在疑似骨性肩关节病变的患者中使用常规CT的3DT1加权破坏的多回波梯度回波序列（FRACTURE）。
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。
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。
