Abstract：
BACKGROUND: Metal artifact reductions sequence (MARS) MRI has been established as a cross-sectional imaging modality for diagnosis of adverse local tissue reaction (ALTR). This study aims to evaluate the current literature regarding the characteristics of MARS MRI associated with intraoperative tissue necrosis and postoperative complications in patients undergoing revision THA because of ALTR.
METHODS: We systematically searched the literature that included reporting MRI characteristics of ALTR in failed THA and their correlation with intraoperative findings and postoperative outcomes.
RESULTS: A total of 617 studies were assessed, and 15 studies met the inclusion criteria. Synovial wall thickness correlated with increasing ALVAL grade, however, weakly with tissue necrosis. Synovial composition of mixed or solid features and the presence of abductor disruption correlated with complications and tissue necrosis. Tissue edema was a poor predictor of aseptic lymphocyte-dominant vasculitis-associated lesion (ALVAL) grade or tissue necrosis.
CONCLUSIONS: MARS MRI synovial composition including mixed and solid features and the presence of abductor disruption provide the best prognostic characteristics associated with intraoperative soft-tissue necrosis and revision surgery outcome. These prognostic characteristics on MRI may assist surgeons with improved criteria for intervention and preoperative patient counseling.
METHODS: We systematically searched the literature that included reporting MRI characteristics of ALTR in failed THA and their correlation with intraoperative findings and postoperative outcomes.
RESULTS: A total of 617 studies were assessed, and 15 studies met the inclusion criteria. Synovial wall thickness correlated with increasing ALVAL grade, however, weakly with tissue necrosis. Synovial composition of mixed or solid features and the presence of abductor disruption correlated with complications and tissue necrosis. Tissue edema was a poor predictor of aseptic lymphocyte-dominant vasculitis-associated lesion (ALVAL) grade or tissue necrosis.
CONCLUSIONS: MARS MRI synovial composition including mixed and solid features and the presence of abductor disruption provide the best prognostic characteristics associated with intraoperative soft-tissue necrosis and revision surgery outcome. These prognostic characteristics on MRI may assist surgeons with improved criteria for intervention and preoperative patient counseling.
摘要：
背景：金属伪影减少序列（MARS）MRI已被建立为用于诊断不良局部组织反应（ALTR）的横截面成像模式。本研究旨在评估由于ALTR而接受THA翻修的患者中与术中组织坏死和术后并发症相关的MARSMRI特征的最新文献。
方法：我们系统检索了文献，包括报告THA失败的ALTR的MRI特征及其与术中发现和术后结果的相关性。
结果：共评估了617项研究，15项研究符合纳入标准.滑膜壁厚与ALVAL等级增加相关，然而,弱组织坏死。混合或固体特征的滑膜组成和外展肌破裂的存在与并发症和组织坏死相关。组织水肿是无菌淋巴细胞显性血管炎相关病变（ALVAL）等级或组织坏死的不良预测指标。
结论：MARSMRI滑膜成分包括混合和实体特征以及外展肌破裂的存在提供了与术中软组织坏死和翻修手术结果相关的最佳预后特征。MRI的这些预后特征可以帮助外科医生改善干预和术前患者咨询的标准。
方法：我们系统检索了文献，包括报告THA失败的ALTR的MRI特征及其与术中发现和术后结果的相关性。
结果：共评估了617项研究，15项研究符合纳入标准.滑膜壁厚与ALVAL等级增加相关，然而,弱组织坏死。混合或固体特征的滑膜组成和外展肌破裂的存在与并发症和组织坏死相关。组织水肿是无菌淋巴细胞显性血管炎相关病变（ALVAL）等级或组织坏死的不良预测指标。
结论：MARSMRI滑膜成分包括混合和实体特征以及外展肌破裂的存在提供了与术中软组织坏死和翻修手术结果相关的最佳预后特征。MRI的这些预后特征可以帮助外科医生改善干预和术前患者咨询的标准。
