外伤性骺早闭MRI的诊断价值

目的 评估MRI对外伤后骺早闭的诊断价值。方法 对21例外伤后骺早闭患儿分别行X线及MRI检查，除常规T1WI和T2WI外，其中8例还行脂肪抑制序列（SPIR）检查；分析MRI在骺早闭的诊断及部位、范围的显示，以及预后方面的应用价值。结果 21例骺早闭位于股骨远端6例、胫骨近端6例，胫骨远端9例；19例成角畸形，2例短缩并成角畸形；21例骺板软骨在T1WI中呈均匀偏低信号，在T2WI中呈均匀高信号，骺早闭表现为线状、条状低信号穿过骺板软骨；8例脂肪抑制序列较常规SE、快速梯度回波（FFE）序列图像更清晰。结论 MRI能清晰显示骺板软骨，明确诊断骺早闭，准确显示骺早闭的部位、程度及范围，为临床手术治疗提供重要依据。

The value of MRI in diagnosing the premature closure of growth plate after trauma

Objective To evaluate the value of MRI in diagnosing the premature closure and other deformities of the growth plate followed physeal injury. Methods Twenty-one children with suspected or known premature closure of the growth plate followed injury were examined with X-ray and MRI. In addition to conventional T 1WI and T 2WI for all cases, 8 were also examined with spectral pre-saturation inversion recovery sequence. The value of MRI in diagnosing and imaging the premature closure of the growth plate (PCGP) was analyzed. Results PCGP was seen in all 21 cases, 6 in the distal femur, 6 in the proximal tibia, and 9 in the distal tibia. 19 patients with angular deformities and 2 cases with both angular and shorten deformities. MRI can much more clearly visualize the cartilage of the growth plate than conventional X-ray. A stripe of low signal intensity through the cartilage of the growth plate indicated premature closure of the growth plate. 8 cases with spectral pre-saturation inversion recovery sequence can visualize the PCGP more clearly than with Spin Echo and Fast Field Echo. Conclusion MRI has an important role in diagnosing and visualizing the PCGP. The configuraton of the PCGP can be accurately mapped with MR imaging and treatment planning is facilitated.