A system, comprising: an interventional apparatus including a catheter and an interventional instrument affixed to an end of the catheter configured to perform an image-guided interventional procedure for a patient, the interventional apparatus comprising: a position detector configured to sense a movement of the catheter within a region of interest and configured to generate a movement signal indicative of the sensed movement; a sheath configured to provide an entry point into a vessel of the patient when inserted into the patient; the catheter, to which the interventional instrument is affixed, configured to be fed through the sheath and into the vessel and routed through the vessel to a position of the interventional instrument within the region of interest; wherein the position detector is affixed to the sheath and located outside of the patient and is configured to sense the movement of the catheter in and out of the entry point with respect to the sheath and generate the movement signal, which is indicative of the sensed movement of the catheter; and an imaging scanner including a controller that activates the imaging scanner to scan the region of interest and the interventional instrument therein for one or more data acquisition cycles based on the movement signal satisfying a predetermined threshold. an interventional apparatus including a catheter and an interventional instrument affixed to an end of the catheter configured to perform an image-guided interventional procedure for a patient, the interventional apparatus comprising: a position detector configured to sense a movement of the catheter within a region of interest and configured to generate a movement signal indicative of the sensed movement; a sheath configured to provide an entry point into a vessel of the patient when inserted into the patient; the catheter, to which the interventional instrument is affixed, configured to be fed through the sheath and into the vessel and routed through the vessel to a position of the interventional instrument within the region of interest; wherein the position detector is affixed to the sheath and located outside of the patient and is configured to sense the movement of the catheter in and out of the entry point with respect to the sheath and generate the movement signal, which is indicative of the sensed movement of the catheter; and a position detector configured to sense a movement of the catheter within a region of interest and configured to generate a movement signal indicative of the sensed movement; a sheath configured to provide an entry point into a vessel of the patient when inserted into the patient; the catheter, to which the interventional instrument is affixed, configured to be fed through the sheath and into the vessel and routed through the vessel to a position of the interventional instrument within the region of interest; wherein the position detector is affixed to the sheath and located outside of the patient and is configured to sense the movement of the catheter in and out of the entry point with respect to the sheath and generate the movement signal, which is indicative of the sensed movement of the catheter; and an imaging scanner including a controller that activates the imaging scanner to scan the region of interest and the interventional instrument therein for one or more data acquisition cycles based on the movement signal satisfying a predetermined threshold.