An imaging catheter includes a delivery lumen and an imaging array. The imaging catheter is sized to be inserted within an introducer sheath. The delivery lumen facilitates insertion of a therapeutic device. An imager is arranged on an outside surface of a distal end of the imaging catheter. The imager collapses the distal end of the imaging catheter when the imager is within the introducer sheath. The distal end of the imaging catheter is allowed to expand when the imager exits the introducer sheath to facilitate delivery of the therapeutic device to a therapy site.
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