Automated detector balance

摘要

A gamma camera and a counterweight are mounted to a support structure. A motor causes the support structure to move about a pivot axis. A controller measures the rate of motion of the support structure and compares that rate to a predetermined rate. The controller causes a second motor to move the counterweight a distance based on the difference between the measured and predetermined rates. The process is repeated until the difference is less than a threshold value. In a second embodiment, the current drawn by the motor is measured. The controller causes the counterweight to move a distance based on the measured current. The support structure is rotated about an axis of rotation to a 90 degree position prior to moving the support structure and to a 0 degree position prior to moving the counterweight.