An x-ray densitometry system provides computer assistance to the operator in identifying possible sources of scanning or analysis error through computer review of the acquired data, operator input, and the ultimate diagnostic outputs. The initiation layer presents at least one first reactive moiety which is then chemically reacted with at least one first reaction material using atomic layer deposition conditions to form a second reactive moiety. Data units are transferred between the transparent ports, between the transparent and non-transparent ports, and between the non-transparent ports.