Radiography with the radiation source about two meters (six and a half feet) from the subject, more nearly securing parallelism of the rays and minimizing distortion.

1. Radiography in which the x-ray tube is placed some distance from the plate in order to minimize distortion.
2. Radiography with the X-ray tube positioned about two meters from the film thereby securing practical parallelism of the X-rays to minimize geometric distortion; the standard configuration for chest radiography.