OBJECTIVE: A variety of medical robots have been developed in recent years. MRI, including MR angiography and morphological imaging, with its excellent soft-tissue contrast is attractive for the development of interventional MRI-guided therapies and operations. This paper presents a telerobotic device for use in CT- and/or MR-guided radiological interventions. A robotic device for precise needle insertion during MR-guided therapy of spinal diseases will be briefly described. MATERIALS AND METHODS: Actuation of robots in an MRI environment is difficult due to the presence of strong magnetic fields. Therefore, the robot was constructed of nonmagnetic materials. The system frame was built from polyether ether ketone (PEEK) and fiber-reinforced epoxy, and actuated using ultrasonic and pneumatic motors. Completely MR-compatible sensors were developed for positioning control. RESULTS: Accuracy evaluation procedures and phantom tests were performed, with the required accuracy of approximately 1 mm being achieved and no significant artifacts being caused by the robotic device during MR image acquisition.
OBJECTIVE: A variety of medical robots have been developed in recent years. MRI, including MR angiography and morphological imaging, with its excellent soft-tissue contrast is attractive for the development of interventional MRI-guided therapies and operations. This paper presents a telerobotic device for use in CT- and/or MR-guided radiological interventions. A robotic device for precise needle insertion during MR-guided therapy of spinal diseases will be briefly described. MATERIALS AND METHODS: Actuation of robots in an MRI environment is difficult due to the presence of strong magnetic fields. Therefore, the robot was constructed of nonmagnetic materials. The system frame was built from polyether ether ketone (PEEK) and fiber-reinforced epoxy, and actuated using ultrasonic and pneumatic motors. Completely MR-compatible sensors were developed for positioning control. RESULTS: Accuracy evaluation procedures and phantom tests were performed, with the required accuracy of approximately 1 mm being achieved and no significant artifacts being caused by the robotic device during MR image acquisition.
Authors: Michael Muntener; Alexandru Patriciu; Doru Petrisor; Dumitru Mazilu; Herman Bagga; Louis Kavoussi; Kevin Cleary; Dan Stoianovici Journal: Urology Date: 2006-12 Impact factor: 2.649
Authors: Alexandru Patriciu; Doru Petrisor; Michael Muntener; Dumitru Mazilu; Michael Schär; Dan Stoianovici Journal: IEEE Trans Biomed Eng Date: 2007-08 Impact factor: 4.538
Authors: Dan Stoianovici; Danny Song; Doru Petrisor; Daniel Ursu; Dumitru Mazilu; Michael Muntener; Michael Mutener; Michael Schar; Alexandru Patriciu Journal: Minim Invasive Ther Allied Technol Date: 2007 Impact factor: 2.442