Leeds Musculoskeletal Biomedical Research Centre, University of Leeds, Chapel Allerton Hospital, Leeds, UK.
Eur Radiol. 2011 Jun;21(6):1144-52. doi: 10.1007/s00330-010-2040-z. Epub 2010 Dec 29.
To compare conventional MRI, ultrashort echo time MRI and ultrasound for assessing the extent of tendon abnormalities in spondyloarthritis.
25 patients with spondyloarthritis and Achilles symptoms were studied with MRI and ultrasound. MR images of the Achilles tendon were acquired using T1-weighted spin echo, gradient echo and ultrashort echo time (UTE) sequences with echo times (TE) between 0.07 and 16 ms, before and after intravenous contrast medium. Greyscale and power Doppler ultrasound were also performed. The craniocaudal extent of imaging abnormalities measured by a consultant musculoskeletal radiologist was compared between the different techniques.
Abnormalities were most extensive on spoiled gradient echo images with TE = 2 ms. Contrast enhancement after intravenous gadolinium was greatest on the UTE images (TE = 0.07 ms). Fewer abnormalities were demonstrated using unenhanced UTE. Abnormalities were more extensive on MRI than ultrasound. Contrast enhancement was more extensive than power Doppler signal.
3D spoiled gradient echo images with an echo time of 2 ms demonstrate more extensive tendon abnormalities than the other techniques in spondyloarthritis. Abnormalities of vascularity are best demonstrated on enhanced ultrashort echo time images.
比较常规 MRI、超短回波时间 MRI 和超声在评估强直性脊柱炎肌腱异常程度中的作用。
对 25 例有强直性脊柱炎和跟腱症状的患者进行 MRI 和超声检查。使用 T1 加权自旋回波、梯度回波和超短回波时间（UTE）序列获取跟腱的 MR 图像，回波时间（TE）在 0.07 到 16 ms 之间，在静脉注射对比剂前后进行。还进行了灰阶和功率多普勒超声检查。由顾问肌肉骨骼放射科医生评估的不同技术之间的成像异常的头侧-尾侧范围进行比较。
TE = 2 ms 的扰相梯度回波图像上的异常最广泛。静脉注射钆后增强在 UTE 图像（TE = 0.07 ms）上最大。未增强的 UTE 显示的异常较少。MRI 显示的异常比超声多。增强后显示的异常比功率多普勒信号多。
在强直性脊柱炎中，TE 为 2 ms 的 3D 扰相梯度回波图像显示的肌腱异常比其他技术更广泛。增强后的超短回波时间图像最能显示血管异常。
