MRI在骨肉瘤诊断中的应用价值

目的:探讨MR常规序列及STIR序列在骨肉瘤诊断中的应用价值。方法:对16例经手术或穿刺病理证实的骨肉瘤患者MRI影像资料进行对比分析。结果:16例患者在MRI常规序列(SE)检查中,6例T1WI/T2WI表现为低信号;2例表现为T1WI低信号,T2WI高信号;其余均表现为T1WI不规则低信号,T2WI为不规则高信号。SE与STIR均能显示肿瘤的形态、部位,STIR序列显示为病变区及周边呈片状高信号,且范围比SE序列显示更大。结论:MRI常规序列可以显示肿瘤的形态、部位,STIR序列在显示肿瘤的侵蚀范围上,显示比较明显、准确,更具有明显优势。

MRI in Diagnosis of Osteosarcoma

Objective: To evaluate spin-echo and short invarsion time inversion recovery(STIR) sequences in diagnosis of osteosarcoma.Method: The MR imaging appearances of 16 cases with osteosarcoma proved by operation or biopsy were retrospectively analysed.Result: On MR spin-echo sequences,the osteosarcoma showed hypointense signal on T1WI and T2WI in 6 cases,hypointense signal on T1WI and hyperintense signal on T2WI in 2 cases;and inhomogeneous hypointense signal on T1WI and inhomogeneous hyperintense signal on T2WI in 8 cases.The shape and location of osteosarcoma could be detected with SE or STIR sequences.The tumor and peritumoral tissue displayed hyperintense signal on STIR in all cases,and it was of a greater volume of abnormality than SE sequences.Conclusion: Traditional MR sequences could depict the shape and location of osteosarcoma,the invaded extent of osteosarcoma on STIR sequence was more conspicuous and accurate than on SE sequences.