Patent ID: 9568612
Date: 2017-02-14
CPC Classifications: G01T

Claim:
1. A 3D image generation system adapted to correlate the position of a gamma probe head at any time of a scan with the measured gamma rate to generate a map of the rate distribution across scan points, the 3D image generation system comprising: a gamma probe, the gamma probe having a probe head, the gamma probe adapted to determine the gamma intensity distributions of a target area; a frame having a periphery defining a plurality of corners; a position sensor producing electrical signals having values uniquely corresponding to the position of a preferred point of the gamma probe within a defined geometrical area of interest bounded by the periphery of the frame; a signal conditioning processor having an input accepting the electrical signals from the position sensor and having means for generating an output of corresponding position coordinates; a gamma radiation detector having a plurality of detection elements disposed on the gamma probe at varying distances with respect to a detection target, the detection elements responding to varying gamma probe rates; a first processor having means for correlating the position coordinates and the gamma probe rates corrected for probe head orientation variations; a second processor having means for obtaining target depth information from relative gamma probe rates of the plurality of detection elements; memory connected to the first and second processors, the memory storing indicia of radiation strength corresponding to the correlated position coordinates, gamma probe rates, and target depth information; a display rendering in a single scanning cycle the stored indicia as a rate map image viewable by a user; a ground lead connected to a tip of the probe; a resistive foil attached to the frame and spanning the area bounded by the frame periphery, the resistive foil transmitting probe head position when the tip of the probe touches the resistive foil in electrical contact with the resistive foil; a resistor disposed at a respective peripheral corner of the frame, each of the resistors having a first terminal in electrical contact with the resistive foil and a second terminal for transmitting the probe head position.