Patent ID: 9568637
Date: 2017-02-14
CPC Classifications: G01T,G01V

Claim:
1. A self-blanking radiation portal monitor for discriminating between gamma-ray target and neutron target radiation indicative of target contents and x-ray non-target radiation, the self-blanking radiation portal monitor comprising: at least a first detector for receiving input radiation including at least one of gamma-ray target radiation and x-ray non-target radiation and generating output signals indicative of the input radiation; and a blanking circuit for processing the output signals to blank out the x-ray non-target radiation indicated therein and provide only gamma-ray target radiation signals, wherein the gamma-ray target radiation signals are used to image the target contents and further wherein the blanking circuit comprises: a blanking delay module for receiving each of the output signals from the at least a first detector and applying a first predetermined time delay thereto; a first blanking switch for receiving each of the delayed output signals; a discriminator for receiving each of the output signals from the first detector and determining if it includes x-ray non-target radiation and signaling the first blanking switch in accordance with the determination.