Abstract
Objective
To analyse the feasibility and accuracy of robotic aided interventions on a phantom when using a modern C-arm-mounted cone beam computed tomography (CBCT) device in combination with needle guidance software.
Methods
A small robotic device capable of holding and guiding needles was attached to the intervention table. After acquiring a 3D data set the access path was planned on the CBCT workstation and shown on the intervention monitor. Then the robot was aligned to the live fluorosopic image. A total of 40 punctures were randomly conducted on a phantom armed with several targets (diameter 2 mm) in single and double oblique trajectory (n = 20 each). Target distance, needle deviation and time for the procedures were analysed.
Results
All phantom interventions (n = 40) could be performed successfully. Mean target access path within the phantom was 8.5 cm (min 4.2 cm, max 13.5 cm). Average needle tip deviation was 1.1 mm (min 0 mm, max 4.5 mm), time duration was 3:59 min (min 2:07 min, max 10:37 min).
Conclusion
When using the proposed robot device in a CBCT intervention suite, highly accurate needle-based interventional punctures are possible in a reasonable timely manner in single as well as in double oblique trajectories.
Key Points
• Percutaneous image-guided biopsy is an important contribution of modern radiology.
• A compact robotic device has been developed which may facilitate such procedures.
• Accurate needle-based interventions are possible in a timely manner.
• Complex trajectories and even deep access paths are possible.
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Schulz, B., Eichler, K., Siebenhandl, P. et al. Accuracy and speed of robotic assisted needle interventions using a modern cone beam computed tomography intervention suite: a phantom study. Eur Radiol 23, 198–204 (2013). https://doi.org/10.1007/s00330-012-2585-0
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DOI: https://doi.org/10.1007/s00330-012-2585-0