In this paper, a novel hybrid sensing method for tracking an ultrasonic endoscope within the gastrointestinal (GI) track is presented, and the prototype of the tracking system is also developed. We implement 6-DOF localization by sensing integration and information fusion. On the hardware level, a tri-axis gyroscope and accelerometer, and a magnetic angular rate and gravity (MARG) sensor array ...

The aim of this study is to compare two methodologies of prostate localization in a large cohort of patients. Daily prostate localization using B-mode ultrasound has been performed at the Nebraska Medical Center since 2000. More recently, a technology using electromagnetic transponders implanted within the prostate was introduced into our clinic (Calypso(R)). With each technology, patients were...

This paper presents experimental investigations on high precision localization methods of body-worn miniature antennas using ultra-wideband technology in line-of-sight conditions. Time of Arrival data fusion and peak detection techniques are implemented to estimate the three-dimensional location of the transmitting tags in terms of x, y, z Cartesian coordinates. Several pseudo-dynamic experimen...

A method which automatically provides the position and orientation of a directional acoustic source in an enclosed environment is proposed. In this method, different combinations of the estimated parameters from the received signals and the microphone positions of each array are used as inputs to the artificial neural network (ANN). The estimated parameters are composed of time delay estimates ...

BACKGROUND Accurate detection of the boundaries of the subthalamic nucleus (STN) in deep brain stimulation (DBS) surgery using microelectrode recording (MER) is considered to refine localization and may therefore improve clinical outcome. However, MER tends to extend operation time and its cost-utility balance has been debated. OBJECTIVES To quantify the tradeoff between accuracy of STN local...

Indoor localization and Location Based Services (LBS) can greatly benefit from the widescale proliferation of communication devices. The basic requirements of a system that can provide the aforementioned services are energy efficiency, scalability, lower costs, wide reception range, high localization accuracy and availability. Different technologies such as WiFi, UWB, RFID have been leveraged t...

We have developed a new localization algorithm based on a set of uncorrelated discriminant vectors (SUV). Comparing to the centralized multidimensional localization algorithm MDS-MAP that has been widely used in wireless sensor networks, this algorithm can improve the localization accuracy and reduce the computing complexity. In this algorithm, the solving equation of the double centered matrix...

BACKGROUND: Catheter, needle, and electrode misplacement in navigated neurosurgery can result in ineffective treatment and severe complications. OBJECTIVE: To assess the Ommaya ventricular catheter localization accuracy both along the planned trajectory and at the target. METHODS: We measured the localization error along the ventricular catheter and on its tip for 15 consecutive patients who un...