• Noriko Kikuchi, Masahiro Yanagawa, Yukihiro Enchi, Akiko Nakayama, Yuriko Yoshida, Tomo Miyata, Akinori Hata, Mitsuko Tsubamoto, Osamu Honda, and Noriyuki Tomiyama.
• From the Department of Radiology, Osaka University Graduate School of Medicine, Suita-city.
• Medicine (Baltimore). 2020 Jun 12; 99 (24): e20579.

AbstractThe aim was to compare the effects of metal artifacts from a pacemaker on pulmonary nodule detection among computed tomography (CT) images reconstructed using filtered back projection (FBP), single-energy metal artifact reduction (SEMAR), and forward-projected model-based iterative reconstruction solution (FIRST).Nine simulated nodules were placed inside a chest phantom with a pacemaker. CT images reconstructed using FBP, SEMAR, and FIRST were acquired at low and standard dose, and were evaluated by 2 independent radiologists.FIRST demonstrated the most significantly improved metal artifact and nodule detection on low dose CT (P < .0032), except at 10 mA and 5-mm thickness. At standard-dose CT, SEMAR showed the most significant metal artifact reduction (P < .00001). In terms of nodule detection, no significant differences were observed between FIRST and SEMAR (P = .161).With a pacemaker present, FIRST showed the best nodule detection ability at low-dose CT and SEMAR is comparable to FIRST at standard dose CT.

13 keywords...

hide…