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MRI‐guided targeted needle placement during motion using hydrostatic actuators
Author(s) -
Mikaiel Samantha,
Simonelli James,
Li Xinzhou,
Lee YuHsiu,
Lee Yong Seok,
Sung Kyunghyun,
Lu David S.,
Tsao TsuChin,
Wu Holden H.
Publication year - 2020
Publication title -
the international journal of medical robotics and computer assisted surgery
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 53
eISSN - 1478-596X
pISSN - 1478-5951
DOI - 10.1002/rcs.2041
Subject(s) - actuator , magnetic resonance imaging , imaging phantom , computer science , hydrostatic equilibrium , biomedical engineering , hydrostatic pressure , materials science , nuclear medicine , medicine , physics , radiology , artificial intelligence , quantum mechanics , thermodynamics
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.