Daglish Jodie, Frisbie David D, Selberg Kurt T, Barrett Myra F
Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523.
Gail Holmes Equine Orthopaedic Research Center, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, CO, 80523.
Vet Radiol Ultrasound. 2018 Nov;59(6):721-736. doi: 10.1111/vru.12674. Epub 2018 Aug 22.
High field magnetic resonance imaging (MRI) is increasingly used for horses with suspected stifle disease, however there is limited available information on normal imaging anatomy and potential incidental findings. The aim of this prospective, anatomic study was to develop an optimized high field MRI protocol for evaluation of the equine stifle and provide detailed descriptions of the normal MRI appearance of the stifle soft tissues, using ultrasound and gross pathological examination as comparison tests. Nine cadaver limbs were acquired from clinically normal horses. Stifles were evaluated ultrasonographically and then by an extensive 1.5 T MRI protocol. Subsequently, all stifles were evaluated for gross pathologic change. Findings were compared between gross evaluation and MRI imaging and described. No soft tissue structure abnormalities were identified on any evaluation. Specific descriptive findings of the meniscotibial, meniscofemoral, collateral, patellar and cruciate ligaments, and the menisci were reported. The high field MRI protocol described in this study provided high spatial and contrast resolution of the soft tissue structures, and this in turn allowed visualization of detailed structural characteristics, such as striations and variations in signal intensity. Findings supported the use of high field MRI as a modality for the evaluation of the soft tissues of the equine stifle. As clinical availability of this modality increases in the future, authors anticipate that new stifle diseases will be detected that have not previously been identified with other imaging modalities.
高场磁共振成像（MRI）越来越多地用于疑似患有 stifle 疾病的马匹，然而，关于正常成像解剖结构和潜在偶然发现的可用信息有限。这项前瞻性解剖学研究的目的是开发一种优化的高场 MRI 方案，用于评估马的 stifle，并使用超声和大体病理学检查作为对照测试，详细描述 stifle 软组织的正常 MRI 表现。从临床正常的马匹获取了九条尸体肢体。首先对 stifle 进行超声检查，然后采用广泛的 1.5T MRI 方案进行评估。随后，对所有 stifle 进行大体病理变化评估。比较并描述了大体评估和 MRI 成像之间的发现。在任何评估中均未发现软组织结构异常。报告了半月板胫骨、半月板股骨、侧副、髌和十字韧带以及半月板的具体描述性发现。本研究中描述的高场 MRI 方案提供了软组织结构的高空间和对比度分辨率，进而能够观察到详细的结构特征，如条纹和信号强度变化。这些发现支持将高场 MRI 用作评估马 stifle 软组织的一种方式。随着这种方式在未来临床应用的增加，作者预计将检测到以前其他成像方式未发现的新的 stifle 疾病。
