Nano-imaging camera
A nano-imaging camera was a type of nanotechnology, a camera capable of viewing microscopic features in real time. It was a thin appliance that looked similar to a needle.
In 2153, a nano-imaging camera, attached to a thin black lead, was operated by Doctor Phlox, in sickbay of Enterprise NX-01. He used it to look inside a Lyssarian Desert Larvae which he had injected with a sample of blood from a comatose Charles Tucker III. The camera was inserted into the larvae, and as the organism began to develop into a mimetic simbiot, the footage from the camera was relayed onto a large overhead monitor in the room. (ENT: "Similitude")
The term "nano-imaging camera" comes from the final draft script of "Similitude", which also described it as "needle-like".