Related Experiment Video
Updated: Jun 5, 2026
Translational Rabbit Model of Chronic Cardiac Pacing
Published on: January 6, 2023
[Metal Artifact Assessment of Multiple MRI-conditional Pacing and Defibrillation Leads: A Phantom Study Comparing
Shiro Masuda1, Shuhei Ogita1, Haruka Aoyagi1
1Department of Radiological Technology, Osaka Keisatsu Hospital.
Purpose:
This study aimed to evaluate metal artifacts in cardiac magnetic resonance imaging using four pacing leads and four defibrillation leads and to clarify the effects of lead differences on image quality.
Methods:
Each lead was fixed in a phantom and aligned parallel to the X-, Y-, and Z-axis. Short-axis images were acquired using balanced steady-state free precession (balanced SSFP) and fast gradient echo (FGRE). Artifact area (S0) and increase rate (ΔS) were calculated. For each lead, the maximum value among the three axes was used to perform inter-lead comparisons. Visual assessment was also performed using short-axis images.
Results:
In the physical evaluation, both S0 and ΔS tended to be greater with FGRE than with balanced SSFP for all leads. The median (range) of the maximum S0 and ΔS values among the three axes for each lead were 152.02 mm2 (119.17-183.49) and 5024.27% (4562.10-6956.83), respectively, for pacing leads, and 114.43 mm2 (79.51-148.11) and 2073.16% (1398.30-3561.46), respectively, for defibrillation leads. In the visual assessment, metal artifacts were significantly larger in some defibrillation leads in both balanced SSFP and FGRE.
Conclusion:
Pacing leads showed relatively small inter-lead differences, whereas some defibrillation leads exhibited inter-lead variability, suggesting the involvement of structural factors.
