Description - Formula for determining the range of values of the first half-value layer of aluminum, measured with the compression paddle in place.

The range of values of the first half-value layer of aluminum, measurement with the compression paddle in place, determined by the equation "X-ray Tube Voltage (kV) divided by 100, plus 0.03, less than or equal to HVL (mm of Aluminum) less than or equal to, X-ray Tube Voltage (kV) divided by 100, plus C".