Abstract: A method for image guidance of coronary stent deployment using radiopaque markers and the image processing technique of moving layer decomposition. The radiopaque markers are attached to guidewires or delivery balloons that are used to place the stent and co-moves with the coronary vessel. A series of fluoroscopic images are taken during the stent placement and are used to generate layer images which represent different structures in the angiograms, such as the stent and guidewires, background structures, etc. The clearly visible images of the markers are used in the layer decomposition. Although stents are less radiopaque than the markers, visibility of previously deployed stents is also enhanced in the layer images. The layer images are used to guide placement of multiple stents to prevent overlap or gaps between the stents. After stent expansion, angiographic images are acquired of the lumen filled with liquid contrast agent.

Abstract: A doorjamb strike plate reinforcing device to provide increased holding strength and, therefore, security to bolted doors and similar closures. A reinforcing device is provided having a rigid body configured for cooperating with a strike plate to laterally restrain a bolt received by the strike plate. Integral to the body of the device is fastening means for fastening a fastener thereto to secure the device to the doorjamb. The fastening means is configured for receiving a fastener from a direction above the device and for guiding the passage of the fastener into the doorjamb in a direction which is at an angle of less than 25 degrees to the plane defined by the strike plate and, preferably not greater than 10 degrees so as to provide for the anchoring of the device and strike plate in a direction which is substantially parallel to the line of force which would be exerted thereon during an attempt to forcefully open a bolted door.