Figure 1

Detected CT landmarks. Examples of automatically detected anatomical landmarks in a thoraco/abdominal/pelvic CT-scan (inner tips of left and right clavicle, top of right and left lung, bronchial bifurcation, front and back of bottom plate of lumbar vertebra 5, pubic symphysis and coccygeal bone). Automatic detection of 44 thoracic, abdominal and pelvic landmarks in each CT-scan enables setting up a patient specific coordinate-system, cross-linkage of the coordinate-systems of consecutive CT-scans and a software-based navigation between baseline and follow-up CT-scans.