Apparatus and methods are provided for use with an endoluminal data acquisition device (31) that acquires a set of endoluminal data points of a lumen of a subject s body at respective locations inside the lumen a second endoluminal device and a display configured to display images. At least one processor includes location association functionality that associates a given data point acquired by the endoluminal data acquisition device with a given location within the lumen. Location determination functionality determines by means of image processing in an extraluminal image of the second endoluminal device a current location of at least a portion of the second endoluminal device. Display driving functionality drives the display to display an indication of the endoluminal data point associated with the location in response to determining that the portion of the second device is currently at the location. Other applications are also described.
