Objectives: variations in the positions of organs and bones resulting from two different body positions during PMCT were investigated. Methodology: Forty-four bodies were CT-scanned in two positions and compared using 18 landmarks and 27 distances. Results and conclusion: Differences below 1 cm were observed for all measurements. The most significant variation was observed along the cranio-caudal plan (z). Awareness of these movements is important when using 3D models for visualization or 3D reconstructions.