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Fig. 2 | BMC Oral Health

Fig. 2

From: Prediction of oral squamous cell carcinoma based on machine learning of breath samples: a prospective controlled study

Fig. 2

Comparison of pre- and postoperative measurements. The heat map shows 25 areas of interest revealed using 44 measurements of 22 patients before and after surgery in negative drift mode. Certain VOCs are present in all samples (areas 1, 2, 5, 9), and display different signal intensity (concentration), others are inconsistently observed (e.g. areas 6, 12, 14, 17, 20), and some VOCs are present in exclusively pre- or postoperative samples (e.g. areas 24 and 25)

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BMC Oral Health

ISSN: 1472-6831

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