Data Set Information:

阻抗测量在以下频率下进行：15.625、31.25、62.5、125、250、500和1000 KHz
在以下频率下对新鲜切除的乳腺组织进行阻抗测量：15.625,31.25,62.5,125,250,500,1000 KHz。绘制在（实-虚）平面上的这些测量值构成了阻抗谱，从中计算乳腺组织特征。
该数据集可用于预测原始6类或4类的分类，方法是将鉴别不重要的纤维腺瘤、乳腺病和腺体类合并在一起（无论如何都无法准确鉴别）。

Attribute Information:

I0 Impedivity (ohm) at zero frequency
PA500 phase angle at 500 KHz
HFS high-frequency slope of phase angle
DA impedance distance between spectral ends
AREA area under spectrum
A/DA area normalized by DA
MAX IP maximum of the spectrum
DR distance between I0 and real part of the maximum frequency point
P length of the spectral curve
Class   car(carcinoma), fad (fibro-adenoma), mas (mastopathy), gla (glandular), con (connective), adi (adipose). The

Relevant Papers:

Jossinet J (1996) Variability of impedivity in normal and pathological breast tissue. Med. & Biol. Eng. & Comput, 34: 346-350.
Silva JE, Marques de Sá JP, Jossinet J (2000) Classification of Breast Tissue by Electrical Impedance Spectroscopy. Med & Bio Eng & Computing, 38:26-30.

Citation Request:

Please refer to the Machine Learning Repository's citation policy

JP Marques de Sá, INEB-Instituto de Engenharia Biomédica, Porto, Portugal; e-mail: jpmdesa '@' gmail.com
J Jossinet, inserm, Lyon, France