1. An intravascular system comprising: (a) an intravascular imaging catheter including a proximal end and a distal end, a transducer located in a transducer position near the distal end of the intravascular imaging catheter, a first telescoping portion, and a second telescoping portion, the first telescoping portion being configured to telescope within the second telescoping portion to facilitate motion of the transducer; (b) a position sensor including a movable element positioned on the first telescoping portion of the catheter and a reference element positioned on the second telescoping portion of the catheter, the movable element having a movable element position that is correlated to the transducer position, the position sensor being configured to measure the movable element position relative to a position of the reference element; (c) an intravascular imaging engine coupled to the intravascular imaging catheter, the intravascular imaging engine being configured to receive image information from the intravascular imaging catheter and position information from the position sensor and to generate a display based on the image information and the position information.