Radiology Department, Urmia University of Medical Sciences, Urmia, Iran.
BMC Med Imaging. 2011 Apr 10;11:9. doi: 10.1186/1471-2342-11-9.
Soft tissue foreign bodies are a common cause of orthopedic consultation in emergency departments. It is difficult to confirm their existence because conventional radiology only detects radio-opaque foreign bodies. Sonography can be a useful diagnostic method. The aim of this study is to evaluate diagnostic accuracy of sonography in detection and localization of non-opaque foreign bodies.
We evaluated 47 patients with suspected foreign body retention in soft tissues by 10 MHz linear array transducer. A single radiologist performed all examinations with 6 years' experience in musculoskeletal Sonography. We detected and localized the presence of the foreign body in the soft tissue as guidance for facilitating the surgery.
We detected soft tissue foreign body in 45 cases as hyperechoic foci. Posterior acoustic shadowing was seen in 36 cases and halo sign was seen in 5 cases due to abscess or granulation tissue formation. Surgery was performed in 39 patients and 44 foreign bodies were removed.
Sonography is a useful modality in detection and localization of radiolucent foreign bodies in soft tissue which can avoid misdiagnosis during primary emergency evaluation.
软组织异物是急诊骨科就诊的常见原因。由于常规放射学仅检测到不透射线的异物，因此很难确认其存在。超声检查可能是一种有用的诊断方法。本研究旨在评估超声检查在检测和定位非不透射线异物方面的诊断准确性。
我们使用 10MHz 线性阵列探头对 47 例疑似软组织异物存留的患者进行评估。一位具有 6 年肌肉骨骼超声检查经验的单一放射科医生进行了所有检查。我们检测并定位软组织中异物的存在，以指导手术。
我们在 45 例患者中检测到软组织异物呈高回声焦点。36 例患者可见后声影，5 例患者由于脓肿或肉芽组织形成可见晕征。39 例患者进行了手术，取出了 44 个异物。
超声检查在检测和定位软组织中的不透射线异物方面是一种有用的方法，可以避免在初次急诊评估中误诊。
