Background
Magnetic resonance imaging (MRI) has unique advantages for guiding interventions, but the narrow space is a major challenge. This study evaluates the feasibility of a remote‐controlled hydrostatic actuator system for MRI‐guided targeted needle placement.
Methods
The effects of the hydrostatic actuator system on MR image quality were evaluated. Using a reference step‐and‐shoot method (SS) and the proposed actuator‐assisted method (AA), two operators performed MRI‐guided needle placement in targets (n = 12) in a motion phantom.
Results
The hydrostatic actuator system exhibited negligible impact on MR image quality. In dynamic targets, AA was significantly more accurate and precise than SS, with mean ± SD needle‐to‐target error of 1.8 ± 1.0 mm (operator 1) and 1.3 ± 0.5 mm (operator 2). AA reduced the insertion time by 50% to 80% and total procedure time by 25%, compared to SS.
Conclusions
The proposed hydrostatic actuator system may improve accuracy and reduce procedure time for MRI‐guided targeted needle placement during motion.