Finzel S, Manske SL, Barnabe CCM, et al. - This study was undertaken to explore the reliability and change over time of erosion measurements in patients with rheumatoid arthritis using high-resolution peripheral quantitative computed tomography (HR-pQCT). Researchers evaluated HR-pQCT scans of 23 patients with RA at baseline and 12 months. They assessed reliability by intraclass correlation coefficients, percentage agreement, and Light k; change over time was characterized by means ± SD of erosion numbers and dimensions. The data indicate that this exercise verified the good reliability of HR-pQCT erosion measurements and their ability to detect change over time.