https://www.selleckchem.com/pr....oducts/oxythiamine-c
Some image marker positions and the smallest image marker (4 × 4cm) led to larger errors in the perceived dimensions of the virtual models than other image marker positions and larger markers (8 × 8 and 12 × 12cm). ≤ 2° and ≤ 2mm errors were found in 70.7% and 76% of cases, respectively. Errors obtained in a non-negligible percentage of cases are not acceptable for certain surgical tasks (e.g. the identification of correct trajectories of surgical instruments). Achieving sufficient accuracy with image marker s