Patent ID: 7881430

Claim:
An imaging system comprising: an x-ray source configured to project a beam of x-rays toward an object to be scanned; a detector configured to detect x-rays energy passing through the object; a computer connected to the detector and configured to receive a detector output and reconstruct an image of the object from the detector output; and a bus controlled by the computer and configured to allow communication between a pair of devices; and a test circuit coupled to the bus and configured to monitor a termination resistance of the bus during operation of the bus, the test circuit comprising: a voltage source configured to generate a static test voltage; a test resistor coupled to the voltage source; a pair of switches coupled to the voltage source and configured to couple the voltage source to the bus, the bus being coupled in series between the pair of switches; and a test point coupled to the test resistor and configured to indicate a voltage in the test circuit.