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Appendix A - CD Datasets

CD datasets are presented in the form of Microsofr Excel files and other types of
data files with examples of signals and images. All dataset Excel files have a
description worksheet.

A.l Breast Tissue

The Breast Tissue.xls file contains 106 electrical impedance measurements
performed on samples of freshly excised tissue from the breast. Six classes of
tissue were studied:

car - carcinoma (2 1 cases)
fad - fibro-adenoma (15 cases)
mas - mastopathy (1 8 cases)
gla - glandular (16 cases)
con - connective (14 cases)
adi - adipose (22 cases)

Impedance meawrements were taken at seven frequencies and plotted in the
(real, - imaginary) plane, constituting the impedance spectrum from which the
features below were computed:

10 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
ADA area normalized by DA
MAX IP maximum of the spectrum
DR distance between I0 and real part of the rnax. frequency point
P length of the spectral curve

Source: J Jossinet, INSERM U.28 1, Lyon, France.
Reference: JE Silva, JP Marques de SB, J Jossinet (2000) Classification of Breast
Tissue by Electrical lmpeda&e Spectroscopy. Med & Bio Eng & Computing,
38:26-30.