Catheter systems with imaging assemblies

A catheter system comprising:

• an elongate catheter body including a distal end and a ridge, the ridge formed as part of the elongate catheter body;
• a cannulation lumen extending through the elongate catheter body and terminating at the distal end of the elongate catheter body;
• a steering element extending through the elongate catheter body for steering the distal end of the elongate catheter body;
• and
• an imaging element secured to a distal end portion of the elongate catheter body and configured to obtain optical images of an area located distally of the distal end of the elongate catheter body,
• wherein the ridge extends axially along an outer surface of the distal end portion, wherein a width of the ridge measured about a circumference of the elongate catheter body is less than a length of the ridge measured along a longitudinal axis of the elongate catheter body, and wherein the imaging element is radially aligned with the ridge with at least a portion of the imaging element disposed within the ridge.