零回波时间MRI显示骨肿瘤性骨质破坏:与CT对比

Value of zero echo time imaging and CT for demonstrating bone destruction in bone tumors and tumor-like lesions

目的采用零回波时间(zero echo time,ZTE)成像对骨肿瘤或肿瘤样病变的患者进行扫描,比较ZTE与CT两种扫描方法在评价骨质破坏方面图像质量方面的差别。方法选取36例患者,其中男18例(平均35±20岁),女18例(平均42±20岁)。采用GE 750W MR仪扫描,利用ZTE成像技术,所有患者均行ZTE-MR及CT扫描,并比较两种成像对于骨肿瘤或肿瘤样病变的骨质破坏的评价,图像质量评分采用5分制方法。结果共发现13种不同类型的骨肿瘤或肿瘤样病变,ZTE-MR及CT检查在图像质量评分分别为(4.47±0.76)和(4.97±0.16),两者间无统计学差异(Z=-1.83,P=0.067)。ZTE-MR及CT评价者之间一致性较好(k=1,k=0.84)。结论本研究提示ZTE-MR可形成与CT相似的骨质影像,对骨质破坏的评价具有很好的一致性。

Objective To compare the image quality of zero echo-time magnetic resonance imaging （ZTE-MRI） with computed tomography （CT） for demonstrating bone destruction in bone tumors and tumor-like lesions. Methods 36 patients （18 male, mean age： 35±20 years; 18 female, mean age： 42±20 years） underwent ZTE-MRI using a 750W MR scanner （GE Medical System） with concomitant CT. Image quality of bone destruction was compared between 7TE and CT using a 5-point grading scale. Results The image quality between ZTE （4.47±0.76） and CT （4.97±0.16） was not significantly different （Z=-1.83, P=0.067） in 13 types of bone tumors and tumor- like lesions. The interobserver agreement was good （k = 1, k = 0.84） in assessing bone destruction between 7TE and CT. Conclusion Image quality of 7TE-MRI is similar to CT for demonstrating bone destruction in bone tumors and tumor-like lesions.