A system for identifying vulnerable plaque includes a catheter having a collection
fiber and a delivery fiber extending therethrough. The catheter is engaged to a
distal face of a housing configured to spin about an axis. The proximal face of
the housing has a central aperture. First and second optical relays extend respectively
between the central aperture and a central port on the distal face and between
a detector and an eccentric port on the distal face. The central and eccentric
ports are in optical communication with the delivery and collection fibers respectively.
