The γ value for all the subjects of this study as a function of age.

<p>Healthy volunteers, patients with brain condition of edema and of hematoma are marked with different symbols.</p

Flow diagram of the clinical study.

<p>Flow diagram of the clinical study.</p

Electrical conductivity (S/m) at specific frequencies for brain tissue, human serum and blood.

<p>From^16–18.</p

Computer tomography (CT) of the brain of the patients involved in the study, prior to the VEPS measurements.

<p>The CT’s are divide into two groups according to clinical neurology pathology valuation: <i>Edema</i> and <i>Hematoma</i>. Moderate to severe diffuse brain edema without hemorrhage or hematomas, and subdural or epidural well located haematomas regions are evident. A description of the particular pathology is given next to each CT image.</p

Table <b>2.</b> Statistical analysis with a Mann-Whitney U test of the VEPS/CP (degrees/cm) data for the experimental groups and subgroups in ranges of frequencies in which a statistically significant difference of P<0.05 between them, was found.

<p>Table <b>2.</b> Statistical analysis with a Mann-Whitney U test of the VEPS/CP (degrees/cm) data for the experimental groups and subgroups in ranges of frequencies in which a statistically significant difference of P<0.05 between them, was found.</p

The β value for all the subjects of this study as a function of the subject age.

<p>Healthy volunteers, patients with brain condition of edema and of hematoma are marked with different symbols.</p

Table <b>1.</b> Listing of data for the healthy volunteers and brain damage patients enrolled in the study.

<p>Table <b>1.</b> Listing of data for the healthy volunteers and brain damage patients enrolled in the study.</p

A scalar classifier plot of each experimental subject in terms of two values for that subject, β and γ.

<p>Each data point represents a subject. Healthy volunteers, patients with brain condition of edema and of hematoma are marked with different symbols.</p

Photographs of the VEPS clinical Head/coil device and an illustration of a patient in a critical care unit wearing the device.

<p>Photographs of the VEPS clinical Head/coil device and an illustration of a patient in a critical care unit wearing the device.</p

Schematic of the VEPS Head/coil configuration and a block diagram of the experimental prototype.

<p>The system consists of five modules: digital synthesizer, transceiver, phase detector, data acquisition and data processing.</p