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首页> 外文期刊>The Veterinary Journal >A comparison of 3-T magnetic resonance imaging and computed tomography arthrography to identify structural cartilage defects of the fetlock joint in the horse
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A comparison of 3-T magnetic resonance imaging and computed tomography arthrography to identify structural cartilage defects of the fetlock joint in the horse

机译：3-T磁共振成像与计算机断层扫描关节造影的比较，以鉴定马中节肢关节的结构软骨缺损

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Articular cartilage defects are prevalent in metacarpo/metatarsophalangeal (MCP/MTP) joints of horses. The aim of this study was to determine and compare the sensitivity and specificity of 3-Tesla magnetic resonance imaging (3-T MRI) and computed tomography arthrography (CTA) to identify structural cartilage defects in the equine MCP/MTP joint. Forty distal cadaver limbs were imaged by CTA (after injection of contrast medium) and by 3-T MRI using specific sequences, namely, dual-echo in the steady-state (DESS), and sampling perfection with application-optimised contrast using different flip-angle evolutions (SPACE). Gross anatomy was used as the gold standard to evaluate sensitivity and specificity of both imaging techniques. CTA sensitivity and specificity were 0.82 and 0.96, respectively, and were significantly higher than those of MRI (0.41 and 0.93, respectively) in detecting overall cartilage defects (no defect vs. defect). The intra and inter-rater agreements were 0.96 and 0.92, respectively, and 0.82 and 0.88, respectively, for CT and MRI. The positive predictive value for MRI was low (0.57). CTA was considered a valuable tool for assessing cartilage defects in the MCP/MTP joint due to its short acquisition time, its specificity and sensitivity, and it was also more accurate than MRI. However, MRI permits assessment of soft tissues and subchondral bone and is a useful technique for joint evaluation, although clinicians should be aware of the limitations of this diagnostic technique, including reduced accuracy
机译：关节软骨缺损在马掌/掌指关节（MCP / MTP）中普遍存在。这项研究的目的是确定和比较3-Tesla磁共振成像（3-T MRI）和计算机断层摄影术（CTA）的敏感性和特异性，以鉴定马MCP / MTP关节中的结构性软骨缺损。通过CTA（注射造影剂后）和3-T MRI使用特定序列（即稳态双回波（DESS））并通过应用优化的对比（使用不同的翻转）进行完美采样，对40个尸体远端肢体成像角度演变（SPACE）。大体解剖被用作评估两种成像技术的敏感性和特异性的金标准。 CTA的敏感性和特异性分别为0.82和0.96，在检测总体软骨缺损（无缺损与缺损）方面显着高于MRI（分别为0.41和0.93）。对于CT和MRI，评估者内部和评估者之间的一致性分别为0.96和0.92，以及0.82和0.88。 MRI的阳性预测值较低（0.57）。 CTA被认为是评估MCP / MTP关节软骨缺损的有价值的工具，因为它的获取时间短，其特异性和敏感性高，并且比MRI更准确。但是，尽管临床医生应该意识到这种诊断技术的局限性，包括准确性降低，但MRI可以评估软组织和软骨下骨，并且是进行关节评估的有用技术。

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