1. A system for imaging with an intra-patient probe, the system comprising: an ultrasound element in the catheter; a marker connected with the catheter, wherein the marker is integrated in the catheter to be repositionable while the catheter is within a patient; an imaging modality configured to sequentially scan a patient while the catheter is within the patient, the marker being at different locations relative to the ultrasound element for different scans of the sequential scans; and a processor configured to register an ultrasound image acquired with the ultrasound element with an image of the imaging modality as a function of the marker at the different locations.