Molecular imaging scanner
The molecular imaging scanner was located above each transporter pad and was used to scan the object to be transported and converted it to a matter stream. 

Because of its crucial function, if the imaging scanner was off by even one thousandth of a percent, the transport would fail. Every transporter pad was equipped with four redundant imaging scanners. This scanner could also be used to program the biofilter. Molecular patterns would be identified with the help of the imaging scanner where upon the biofilter could be programmed to removed those unwanted molecules. ()

In 2369, Chief Miles O'Brien came too late into school, acting as a substitute teacher for his wife Keiko, because the transporter in ops needed a minor adjustment in its upper molecular imaging scanner. ()

In 2375,  Chief Engineering Officer B'Elanna Torres blamed power being routed through the vessel's transporter system on a routine diagnostic being run due to trouble with the imaging scanners when questioned about it by a member of a Devore Imperium inspection team, Prax. He told her that the problem was in the primary energizing coils and to focus her efforts there, though, in truth, the extra power use was due to transporter suspension used to hide the presence of telepaths on the vessel. ()

de:Molekularabbildscanner
fr:Scanner à imagerie moléculaire
Transporter technology
Sensor technology