Abstract
Purpose
To compare CT fluoroscopy-guided manual and CT-guided robotic positioning system (RPS)-assisted needle placement by experienced IR physicians to targets in swine liver.
Materials and Methods
Manual and RPS-assisted needle placement was performed by six experienced IR physicians to four 5 mm fiducial seeds placed in swine liver (n = 6). Placement performance was assessed for placement accuracy, procedure time, number of confirmatory scans, needle manipulations, and procedure radiation dose. Intra-modality difference in performance for each physician was assessed using paired t test. Inter-physician performance variation for each modality was analyzed using Kruskal–Wallis test.
Results
Paired comparison of manual and RPS-assisted placements to a target by the same physician indicated accuracy outcomes was not statistically different (manual: 4.53 mm; RPS: 4.66 mm; p = 0.41), but manual placement resulted in higher total radiation dose (manual: 1075.77 mGy/cm; RPS: 636.4 mGy/cm; p = 0.03), required more confirmation scans (manual: 6.6; RPS: 1.6; p < 0.0001) and needle manipulations (manual: 4.6; RPS: 0.4; p < 0.0001). Procedure time for RPS was longer than manual placement (manual: 6.12 min; RPS: 9.7 min; p = 0.0003). Comparison of inter-physician performance during manual placement indicated significant differences in the time taken to complete placements (p = 0.008) and number of repositions (p = 0.04) but not in other study measures (p > 0.05). Comparison of inter-physician performance during RPS-assisted placement suggested statistically significant differences in procedure time (p = 0.02) and not in other study measures (p > 0.05).
Conclusions
CT-guided RPS-assisted needle placement reduced radiation dose, number of confirmatory scans, and needle manipulations when compared to manual needle placement by experienced IR physicians, with equivalent accuracy.
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Acknowledgments
F. Cornelis would like to acknowledge support from CHU de Bordeaux, Université de Bordeaux, Canceropôle du Grand Sud-Ouest, Association de la Recherche contre le Cancer, Société Française de Radiologie, Société d’Imagerie Génito-Urinaire, Philippe Foundation and the Fulbright Scholarship Program.
Conflict of interest
The project was performed with support of a grant to the corresponding author (GS) from Perfint Healthcare Inc. The grant provided salary support for GS for performing the study. The others have no conflict of interest to report. Author #3 (ML) is a salaried employee of Perfint Healthcare Inc who provided technical support with the robot positioning system for the duration of the experiments. ML was not involved in the design of experiments, data collection, analysis, or interpretation of presented results.
Statement of Human and Animal Rights
The study has been approved by the appropriate institutional research ethics committee and has been performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki and its later amendments or comparable ethical standards.
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Cornelis, F., Takaki, H., Laskhmanan, M. et al. Comparison of CT Fluoroscopy-Guided Manual and CT-Guided Robotic Positioning System for In Vivo Needle Placements in Swine Liver. Cardiovasc Intervent Radiol 38, 1252–1260 (2015). https://doi.org/10.1007/s00270-014-1016-9
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DOI: https://doi.org/10.1007/s00270-014-1016-9