Number of peaks detected by each peak picking method in the single measurements.

<p>Number of peaks detected by each peak picking method in the single measurements.</p

Example for a raw measurement from the first dataset.

<p>The rows of the heatmap represent the retention times and the columns represent 1/K0, a transformation of the drift time. The colors display the signal intensities with increasing values from white over blue and red to yellow.</p

Decision tree algorithm to discriminate between healthy and lung cancer patients.

<p>Decision tree algorithm to discriminate between healthy and lung cancer patients.</p

IMS chromatogram in a healthy volunteer.

<p>One hundred-fifteen VOC peaks were detected with ion mobility spectrometry in patients with lung cancer and healthy volunteers.</p

Characteristics of patients.

<p>Characteristics of patients.</p

Box-and-whisker plots of peak-2 between healthy and lung adenocarcinoma patients.

<p>Peak 2 was significantly higher in patients with lung cancer (p<0.001). The box represents the 25th and 75th percentiles, the whiskers represent the range, and the lined box represents the median, whereas circles represent the mean. Lung adenocarcinoma patients revealed a significantly higher n-Dodecane VOC peak than healthy volunteers and the n-Dodecane VOC peak could separate values with a sensitivity of 81.3% and a specificity of 89.7%.</p