A micro-tomographic analysis is a very thorough molecular analysis.
When the the dilithium chamber hatch aboard the USS Enterprise-D exploded in 2367, Geordi La Forge and Data made a micro-tomographic analyses of the dilithium chamber and the hatch mounting and detected sub-micron fractures in the metal casing, a breakdown in the atomic cohesive structure. This meant that neutron fatigue caused the explosion, not sabotage by the Klingon exobiologist J'Dan, as was originally suspected. (TNG: "The Drumhead")