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为了研究乳腺组织电导率特性及肿瘤生长方式对电阻抗扫描(electrical impedance scanning,EIS)肿瘤成像特征的影响,作者对照分析了69例乳腺肿瘤患者的EIS成像、X线钼靶摄影及离体乳腺组织的阻抗频谱特性。实验得到了40例恶性肿瘤、34例良性肿瘤、49例腺体组织和41例脂肪组织的离体电阻率特性,其中腺体组织和良性肿瘤的电阻率数值最小,其次是癌组织,脂肪组织的电阻率数值最大。恶性肿瘤中EIS检查24例高亮表现,11例暗区表现,5例无表现;良性肿瘤EIS检查多数无特征表现。实验表明,癌组织与其周围正常组织的电导率有显著性差异。因恶性肿瘤浸润组织的不同,组织间的电导率差异会出现正向或负向变化,EIS检查表现出亮、暗不同的特征成像。良性肿瘤的电导率较好,但其与周围组织电导率差异无统计学意义,EIS检查无显著成像。
In order to study the effect of breast tissue conductivity and tumor growth pattern on the characteristics of electrical impedance scanning (EIS) tumor imaging, the authors compared EIS imaging, mammographic X-ray imaging, and isolated breast in 69 breast cancer patients Impedance spectral characteristics of tissue. The in vitro resistivity characteristics of 40 cases of malignant tumors, 34 cases of benign tumors, 49 cases of glandular tissues and 41 cases of adipose tissue were obtained. The values of electrical resistivity of glandular tissues and benign tumors were the lowest, followed by cancer tissues, adipose tissue The maximum resistivity value. EIS examination of malignant tumors in 24 cases highlighted, 11 cases showed dark areas, 5 cases showed no performance; benign tumors most of the EIS showed no features. Experiments show that there is a significant difference between the conductivity of normal tissue and its surrounding tissues. Due to the different tissue infiltration of malignant tumors, there is a positive or negative change in the conductivity difference between the tissues. The EIS examination shows bright and dark features. The conductivity of benign tumors is good, but there is no significant difference between them and the surrounding tissue conductivity, no significant imaging EIS examination.