一项关于在骶髂关节中应用超短回波时间 T2* 软骨成像技术的可行性的初步研究。
A Pilot Study on Feasibility of Ultrashort Echo Time T2* Cartilage Mapping in the Sacroiliac Joints.
机构信息
From the Division of Musculoskeletal Radiology, Department of Radiology, NewYork-Presbyterian Hospital, Columbia University Irving Medical Center, New York, NY.
General Electric (GE) Healthcare, New York, NY.
出版信息
J Comput Assist Tomogr. 2021;45(5):717-721. doi: 10.1097/RCT.0000000000001206.
PURPOSE
Assess feasibility of ultrashort echo time (UTE) T2* cartilage mapping in sacroiliac (SI) joints.
METHODS
Prospective magnetic resonance imagings with UTE T2* cartilage maps obtained on 20 SI joints in 10 subjects. Each joint was segmented into thirds by 2 radiologists. The UTE T2* maps were analyzed; reliability and differences in UTE T2* values between radiologists were assessed.
RESULTS
Mean UTE T2* value was 10.44 ± 0.60 ms. No difference between right/left SI joints (median, 10.52 vs 10.45 ms; P = 0.940), men/women (median, 10.34 vs. 10.57 ms; P = 0.174), or different anatomic regions (median range 10.55-10.69 ms; P = 0.805). Intraclass correlation coefficients were 0.94 to 0.99 (intraobserver) and 0.91 to 0.96 (interobserver). Mean bias ± standard deviation on Bland-Altman was -0.137 ± 0.196 ms (limits of agreement -0.521 and 0.247) without proportional bias (β = 0.148, P = 0.534).
CONCLUSIONS
The UTE T2* cartilage mapping in the SI joints is feasible with high reader reliability.
目的
评估超短回波时间（UTE）T2*软骨成像在骶髂（SI）关节中的可行性。
方法
对 10 名受试者的 20 个 SI 关节进行前瞻性磁共振成像，获得 UTE T2软骨图。由 2 名放射科医生将每个关节分成三部分。对 UTE T2图谱进行分析；评估放射科医生之间 UTE T2*值的可靠性和差异。
结果
平均 UTE T2值为 10.44 ± 0.60 ms。右侧/左侧 SI 关节（中位数，10.52 与 10.45 ms；P = 0.940）、男性/女性（中位数，10.34 与 10.57 ms；P = 0.174）或不同解剖区域（中位数范围 10.55-10.69 ms；P = 0.805）之间的 UTE T2值无差异。观察者内的组内相关系数为 0.94 至 0.99，观察者间的组内相关系数为 0.91 至 0.96。Bland-Altman 的平均偏差±标准偏差为-0.137 ± 0.196 ms（一致性界限为-0.521 和 0.247），不存在比例偏差（β = 0.148，P = 0.534）。
结论
SI 关节的 UTE T2*软骨成像具有较高的读者可靠性，是可行的。
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