Mizel M S, Steinmetz N D, Trepman E
Boston Foot and Ankle Center, New England Baptist Hospital, Massachusetts.
Foot Ankle Int. 1994 Aug;15(8):437-43. doi: 10.1177/107110079401500807.
An experimental study was performed to compare computed tomography (CT), magnetic resonance imaging (MRI), and real-time, high resolution ultrasonography (US) for the detection of wooden foreign bodies in muscle tissue. Wooden splinters were prepared, measured for size, soaked in saline, and placed in porcine muscle distant from and adjacent to bone. The specimens were then examined using roentgenography, CT and MRI in planes parallel and perpendicular to the splinters, and US. The largest wooden foreign bodies (minimum smallest width = 10 mm) were easily detected by CT, MRI, and US. Almost all splinters of various sizes, small and large, soaked in saline for 5 months were easily detected by MRI. Smaller splinters (minimum smallest width = 1-4 mm) soaked for only 3 days and placed distant from bone were most easily detected by US; those soaked for 5 months were most easily detected by either US or MRI. The smaller splinters soaked for only 3 days and placed near bone were not reliably detected by any of the imaging methods; CT and MRI were both more sensitive than US in this situation. MRI scanning was more sensitive perpendicular than parallel to the long axis of the splinters. Therefore, either US or MRI may be the best initial imaging modality for evaluation of a suspected wooden foreign body, depending on availability of imaging method, chronicity of symptoms, and proximity to bone.
进行了一项实验研究，以比较计算机断层扫描（CT）、磁共振成像（MRI）和实时高分辨率超声检查（US）在检测肌肉组织中木质异物方面的效果。制备了木刺，测量其尺寸，浸泡在盐水中，然后放置在远离骨骼和靠近骨骼的猪肌肉中。然后使用X线摄影、CT和MRI在与木刺平行和垂直的平面上以及US对标本进行检查。最大的木质异物（最小宽度 = 10 mm）很容易被CT、MRI和US检测到。几乎所有浸泡在盐水中5个月的各种大小的木刺都很容易被MRI检测到。浸泡仅3天且放置在远离骨骼处的较小木刺（最小宽度 = 1 - 4 mm）最容易被US检测到；浸泡5个月的木刺最容易被US或MRI检测到。浸泡仅3天且放置在靠近骨骼处的较小木刺无法通过任何一种成像方法可靠检测到；在这种情况下，CT和MRI都比US更敏感。MRI扫描在垂直于木刺长轴方向上比平行方向更敏感。因此，根据成像方法的可用性、症状的慢性程度以及与骨骼的接近程度，US或MRI可能是评估疑似木质异物的最佳初始成像方式。
