During a routine patient imaging procedure using an agfa dx-d 100 portable radiographic unit, the counter weight cable snapped and the horizontal arm with attached x-ray tube head fell toward the patient bed.The x-ray head collimator landed on the bed railing and that stopped the fall.Neither patient nor personnel were harmed by the cable failure.After the incident our engineer inspected this agfa dx-d 100 and determined that following the counter weight cable failure, tension was not released from the cable attached to the backup safety latch.Since tension was not released, the backup safety latch did not engage the vertical arm and stop the x-ray head from falling toward the bed.
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