DEVICE POSITION DEPENDANT OVERLAY FOR ROADMAPPING

摘要

An image processor (IP) and an image processing method to support cardio- or neuro-interventions. An imager (100) acquires a series of fluoroscopic images (F) whilst an interventional tool progresses through a region of interest (ROI) such as a cardiac vasculature. Image processor (IP) operates to select from a plurality of stored angiograms (A) previously acquired of the region of interest a contextual one from which a contextual roadmap (RM) can be extracted. The contextual roadmap is selected to fit to both, a current cardiac phase and the current position of the device (GW). The selected contextual angiogram and its contextual roadmap is capable of showing the outlines of the vasculature (ROD at the current device position at high contrast.

主权项

1. An image processing apparatus comprising:
an input port for receiving a projection image of a device acquired whilst said device resides at a position relative to an object, the object capable of transitioning between at least a first and a second object state and said device repositionable; an object state determiner configured to determine a current state of the object; a device localizer configured to use image information in the received projection image to determine the position of the device; an object image selector configured to select from of a plurality of stored object images grouped according to the first object state and the second object state, wherein at least one group comprises more than one of the object images, a contextual object image i) whose group corresponds to the determined object state and ii) whose image information is indicative of the determined device position; and a graphics display generator configured to generate for display on a screen a combined image including a part of the selected contextual object image and the received device projection image.