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多体素氢质子波谱对良恶性肌骨肿瘤鉴别诊断的临床应用价值

Keywords: 肌骨肿瘤,核磁共振,多体素波谱

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Abstract:

目的探讨良恶性肌骨肿瘤氢质子波谱的成像特点及2D-MRS对良恶性肌骨肿瘤鉴别诊断的临床应用价值。方法对经病理证实的33例肌骨肿瘤的病人术前常规行MRI扫描、MRI增强扫描及2D多体素1H-MRS扫描,观察良恶性肌骨肿瘤多体素1H-MRS的成像特点,比较良恶性病变的Cho/Cr比值,并以此作为鉴别良恶性的依据。结果肌骨肿瘤1H-MRS波形与正常下肢肌肉明显不同,恶性肌骨肿瘤的Cho峰升高且明显高于Cr峰,良性肌骨肿瘤中可见极低的Cho及Cr峰,二者几乎等高。良性肿瘤Cho/Cr为1.05±0.25,恶性肿瘤Cho/Cr为2.76±0.54,差异有统计学意义(P<0.05),Cho/Cr比值应用于诊断恶性肿瘤的敏感度为84.6%、特异度为90%、准确率为87.9%。结论2D1H-MRS测得的Cho水平的增高与肌骨肿瘤的恶性度相关,Cho/Cr比值对肌骨肿瘤的良恶性鉴别诊断有一定的临床价值。

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