Patent ID: 7912531

Claim:
An apparatus comprising: a device having dimensions suitable for percutaneous delivery to a patient; an antenna capable of receiving magnetic resonance (MR) signals, wherein the antenna is associated with the device in a manner that provides at least one of a prescribed radial orientation and longitudinal orientation of the antenna at a point of interest within a blood vessel of the patient; and at least one conductive lead coupled with the antenna and extending proximally from the antenna, the at least one conductive lead to convey the received magnetic resonance (MR) signals from the antenna in a proximal direction, wherein the device comprises a primary cannula comprising a segment comprising a plurality of fillets, wherein under a first condition, the segment has a first radial dimension and under a second condition, a larger second radial dimension, and wherein the plurality of fillets each comprises an individual cannula portion that is a tube and are all arranged in a fillet formation coupled at a proximal end to the primary cannula, and wherein a plurality of conductive elements of the antenna are disposed in respective ones of the plurality of cannula portions.