Analyzing the precision of JSW measurements using 3D scans and statistical models
T.T. Withaar, Joost A. Kauffman, Hein J. Bernelot Moens · 2006
One of the methods to diagnose rheumatoid arthritis (RA) ismeasuring joint space narrowing over time. A method is presentedto analyze the sensitivity of this measurement to positioningof the hand. Micro-CT scans are used to generate projectionsof a joint under varying angles of rotation. A semi-automaticmethod is used to measure the joint space width (JSW) for eachprojection. A Statistical model is used to investigate whether therotation can be detected from a 2D radiograph. It is shown thatrotation of the hand has a significant influence on the measured JSW.