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Full-Text Articles in Mechanical Engineering
An Intelligent Systems Approach For An Ultrasonic Based Neuro-Navigation System, Jennifer Akers, Sanjeevi Chitikeshi, Ajay Mahajan, Tsuchin Chu, Etienne Witte, Sumeer Lal
An Intelligent Systems Approach For An Ultrasonic Based Neuro-Navigation System, Jennifer Akers, Sanjeevi Chitikeshi, Ajay Mahajan, Tsuchin Chu, Etienne Witte, Sumeer Lal
Dr. Ajay Mahajan
This paper shows the feasibility of using an intelligent systems approach to increase the accuracy of a 3D ultrasonic position estimation system for real-time image guided neurosurgery. Current image guided systems use camera based technology that is space-intensive, have an accuracy of about 1.0–2.0 mm, and are prone to occasional failures. The 3D system presented in this paper eliminates the space intensive camera, has an accuracy of around 1.0 mm in the operating range of about 200–400 mm, makes the system independent of line-of-sight occlusion problems, and is expected to pave the way for accurate fusion models of MRI and …
Improved Accuracy Of An Ultrasonic Based Neuro-Navigation System Using Neural Networks, Jennifer Akers, Sanjeevi Chitikeshi, Ajay Mahajan, Sumeer Lal
Improved Accuracy Of An Ultrasonic Based Neuro-Navigation System Using Neural Networks, Jennifer Akers, Sanjeevi Chitikeshi, Ajay Mahajan, Sumeer Lal
Dr. Ajay Mahajan
This paper presents the design and development of an ultrasonic based neuronavigation system to be used for real time surgery. The system formulation, hardware and a neural network model is presented that improves the accuracy of the system considerably. 1D, 2D and 3D results from the neural network model are presented along with designs for the physical and electronic hardware. The 3D system presented in this paper eliminates the space intensive camera, has an accuracy better than 1.0 mm in the operating range of about 20–40 cm, makes the system independent of line-of-sight occlusion problems, and is expected to pave …
A Robust Navigation System For Autonomous Vehicles Using Ultrasonics, F. Figueroa, Ajay Mahajan
A Robust Navigation System For Autonomous Vehicles Using Ultrasonics, F. Figueroa, Ajay Mahajan
Dr. Ajay Mahajan
A navigation system has been developed for the guidance and control of autonomously guided vehicles using a novel ultrasonic 3D location system in conjunction with traditional ultrasonic rangefinders. This system is most suitable for navigation in structured environments, e.g., factories, hospitals, offices, nuclear power plans and other hazardous areas. The strengths of the system are accuracy (2.54mm), ease of use, self installation/calibration, and fast position update rates (>100Hz). A method for automatic modifications of maps has been implemented. An object-oriented approach has been used to develop a system that is robust and flexible.