Terry Michael Topka

Generalized Algorithms for Distribution Feeder Deployment and Sectionalizing

Increasing effort is being focused on automated remote control of distribution feeder deployment and sectionalizing to improve service restoration time to unfaulted feeder sections and for transferring load between feeders. Digital processor algorithms which determine fault location and generate switching instructions automatically based on tree searching techniques utilizing switch tables that can be readily defined by an operator are described. Simulation results for fault location, fault isolation, and service restoration, including balancing between feeders using an illustrative simplified feeder configuration are shown.

GE intelligent personal radiation locator system

The GE Intelligent Personal Radiation Locator (IPRL) system consists of multiple hand held radiation detectors and a base station. Each mobile unit has a CZT Compton camera radiation detector and can identify isotopes and determine the direction from which the radiation is detected. Using GPS and internal orientation sensors, the system continuously transforms all directional data into real-world coordinates. Detected radiation is wirelessly transmitted to the base station for system-wide analysis and situational awareness. Data can also be exchanged wirelessly between peers to enhance the overall detection efficiency of the system. The key design features and performance characteristics of the GE IPRL system are described.

A 10 Fr ultrasound catheter with integrated micromotor for 4D intracardiac echocardiography

We developed prototype catheters for real-time three-dimensional intracardiac echo (4D ICE) imaging. The catheter tips contained a low profile 64-element, 6.2 MHz phased array transducer and integrated micromotor, allowing oscillation of the transducer in the elevation direction. The tips were integrated with two-way deflectable 10 Fr catheters and used in in-vivo animal testing at multiple facilities. The 4D ICE catheters were capable of imaging a 90° azimuth by up to 180° elevation field of view. Volume rates ranged from 1 vol/sec (180° elevation) to approximately 10 vol/sec (45° elevation). We successfully imaged electrophysiology catheters, atrial septal puncture procedures, and detailed cardiac anatomy. The elevation oscillation enabled 3D visualization of devices and anatomy providing new clinical information and perspective not possible with current 2D imaging catheters.