Other

National University of Singapore

Nanyang Polytechnic

Marcelo H Ang, Jr

Yaoping Wang

Chee-Kong Chui

Yiyu Cai

Kah Bin Lim

Tian Soon Sim

Percy Chen

Koon-Hou Mak

An apparatus for use in simulated image guided surgery comprises a positional transducer, clamping means located proximate to the transducer, and a processor. The transducer is responsive to a thin flexible member that can be manipulated by a user, and produces signals representative of displacement and rotation of the thin flexible member. The clamping means responds to a controlling signal to apply a predetermined variable clamping force to the flexible member. The processor receives these displacement and rotation signals, and is programmed to plot the path of the flexible member therefrom as it is manipulated by the user. Additionally, the processor produces the controlling signal to the clamping means in response to the instantaneous position along the path. The processor may be coupled to a display device for displaying an image of the instantaneous position of the flexible wire therealong, or other information. The invention also includes a related method for the simulation of image guided surgery. Embodiments of the invention can be used to simulate the manual positioning of a catheter and guidewire, as well as the haptic forces exerted by the user's hand and fingers in that positioning, or can simulate the process of balloon angioplasty, including stent deployment.

Apparatus for the simulation of image-guided surgery

An error reduction and accommodation method and system can be used in an automated assembly environment. This method and system use a simple localized calibration process devised to improve similarity between an actual device and a simulated model when an off-line programming technique is used. The system uses grid-hole tables with modular fixtures holding the workpieces. The grid-hole table has round holes instead of screw holes or T-slots and allows modular fixtures with round pins to be placed on the grid-hole table with greater precision. A compliant coupling which is able to accommodate any small error in the system and when used with any end-tool, allows the assembly robot to carry out tasks within the modular system. The use of the grid-hole table and modular fixtures allows the robot, once taught the grid-hole table and the modular fixtures, to be subsequently programmed off-line to carry out any tasks with any standardized modular fixture placed any where on the grid-hole table. The modular fixtures easily slide into any selected grid-holes as required and may be used without further clamping or may be clamped to the grid-hole table, if so desired.

Precision and quick affixing method for flexible automated assembly

Growing community of inventors

Singapore, Singapore

Marcelo H Ang, Jr