Department of Radiology, E-Da Hospital and I-Shou University, 1 E-Da Road, Jiau-Shu Tsuen, Yan-Chau Shiang, Kaohsiung 824, Taiwan.
Radiology. 2011 Jul;260(1):192-8. doi: 10.1148/radiol.11101301. Epub 2011 Mar 24.
To review the magnetic resonance (MR) imaging findings in eight patients who developed marrow lesions after undergoing physiotherapy with use of ultrasound diathermy.
The authors retrospectively reviewed the medical charts and MR images of eight patients (six women and two men aged 22-69 years) who received ultrasound diathermy treatment for a variety of soft tissue injuries involving primarily the knee, shoulder, and wrist. All patients underwent MR imaging without the use of intravenous gadolinium-based contrast material. The institutional review board approved the study, and the requirement to obtain informed consent was waived.
MR imaging of all patients revealed subcortical rim or arc lesions with low signal intensity on T1-weighted images and high signal intensity on T2-weighted images, without involvement of the deeper aspect of the bone marrow. The imaging features of the lesions were similar to those of focal osteonecrosis. Follow-up MR imaging performed in three patients approximately 2-3 months after cessation of ultrasound therapy revealed resolution of the bone lesions. Symptoms resolved in all patients.
This study demonstrated that ultrasound diathermy may produce an osseous injury. The abnormality itself was usually mild and transient, with apparent full recovery after termination of therapy.
回顾 8 例因接受超声透热理疗而发生骨髓病变的患者的磁共振（MR）成像表现。
本研究回顾性分析了 8 例（6 名女性和 2 名男性，年龄 22-69 岁）接受超声透热理疗治疗各种主要累及膝关节、肩关节和腕关节的软组织损伤患者的病历和 MR 图像。所有患者均在未使用静脉内钆类对比剂的情况下接受了 MR 成像检查。该研究获得了机构审查委员会的批准，且豁免了获得知情同意的要求。
所有患者的 MR 成像均显示，病变呈皮质下边缘或弧形，T1 加权图像呈低信号，T2 加权图像呈高信号，骨髓深部无累及。病变的影像学特征与局灶性骨坏死相似。在停止超声治疗后约 2-3 个月对 3 例患者进行的随访 MR 成像显示骨病变已消退。所有患者的症状均已缓解。
本研究表明，超声透热理疗可能会导致骨损伤。该异常通常为轻度且短暂，在治疗结束后明显完全恢复。
