能谱CT诊断腹部多发病灶同源性的初步研究

Primary Study of Spectral Imaging of Spectral CT for Distinguishing Abdominal Multiple Lesions

目的:探讨CT能谱成像在诊断腹部多发病灶同源性中的价值。材料和方法:收集10例经手术病理或随访观察证实的腹部多发病灶患者资料,回顾性分析患者多发病灶,包括肝脏、胃、肾上腺及腹腔淋巴结转移病灶的CT能谱图像。多发病灶的感兴趣区按照直径5mm的圆形选取,用能谱后处理工具行多发病灶的能量衰减曲线、直方图、散点图分析,将三个图像的吻合情况分成基本吻合,部分吻合,不吻合三种情况,比较多发病灶能谱图像的吻合情况,总结规律,对腹部多发病灶的同源性作出评价。结果:发现腹部恶性肿瘤原发灶与多发转移灶的能量衰减曲线、直方图图像基本吻合,散点图部分吻合,提示原发灶和转移灶同源。多发良性病灶如血管瘤、能谱图像也基本吻合,可帮助诊断病灶的同源性。结论:初步判断能谱CT可作为诊断腹部多发病灶同源性的有效工具。

Objective： To investigate the application of GSI （Gemstone Spectral Imaging） in diagnosising the homology of abdominal multiple lesions. Methods： To collect information of ten patients with abdominal multiple lesions confirmed by operation pathology or follow-up. Retrospective analysis of abdominal multiple lesions, including the liver, stomach, adrenal, celiac lymph node metastasis of the GSI. The region of interest （ROIs） were drawn on 5 mm diameter. All the cases were analyzed with GSI viewer using different parameters of CT spectral imaging, such as spectral HU curve, histogram and GSI scatter plot. Put the three kinds image into match, part of the match and doesn＇t agree with. By compare the parameters, to find the regularity to diagonsis the homology of lesions. Results： The spectral HU curve, histogram and GSI scatter plot of original tumor and metastases of malignant tumor was consistent with each other, that pointing out the original tumor and metastases are homologous. Energy spectrum image of the homologous multiple benign lesions is also similar, such as haemangioma. It is helpful to diagnosis. Conclusion： The gemstone spectral CT can been an effective way to diagnosis the homology of abdominal multiple lesions initially.