Figure 4

Examples. a) An example navigation result of the lesion tracking software applied to a thoracic lesion (lung metastasis). b) An example navigation result of the lesion tracking software applied to an abdominal lesion (liver metastasis). First row shows the manually marked centre of a target lesion in the baseline CT-scan (red X = reference standard; axial, coronal and sagittal view). Second row shows the manually marked centre of a target lesion in the follow-up CT-scan of the same patient (red X = reference standard; axial, coronal and sagittal view). Third row shows the follow-up CT-scan with the software-based navigation result (yellow crosshair) and the reference standard (red X).