(pich )

[Middle English pichen fr Old English piccean, pīcian, to prick]

1. That quality of sound that enables one to classify it in a scale from high to low. The pitch is dependent principally on frequency of vibrations.
2. In radiography, the table speed divided by the width of the x-ray beam.

beam pitch

In computed tomography, the table travel per each spiral rotation of the x-ray beam divided by either the thickness of the detector rows or the collimation of the x-ray.
SEE: table travel speed