O'HARE, Jonathan,DARROUZET, Stephen,OHARE, Jonathan
申请号：
USUS2013/063702
公开号：
WO2014/066022A1
申请日:
2013.10.07
申请国别(地区):
US
年份:
2014
代理人:
摘要：
An imaging method positions a heterogeneous object (10), such as a metallic stent having a polymer coating, within a fixture (38) having a chamber (43). The fixture (38) also has a valve (50) for receiving a gas and normally sealing the chamber (43). Thus, the object (10) is within the chamber (43). Next the method positions the fixture (38) within an active region (24) of a computerised tomographic (CT) machine (18), fluidly connects a gas line to the valve (50), and injects an inert gas into the chamber (43) through the gas line and the valve (50). The inert gas may include one or more of the xenon, argon, and krypton. The method then increases the pressure within the sealed chamber (43) to increase the density of the gas within the chamber (43), and directs x-ray energy toward the active region (24) of the CT machine (18) to produce a plurality of two- dimensional images of the object (10) and the pressurized gas. Finally, the method generates a three-dimensional representation of the object (10) from the plurality of images. In the case of a coated stent, since the metallic portion and the polymeric portion of the stent as well as the pressurising gas haven different X-ray attenuation coefficients, it is possible in the three-dimensional representation of the stent to distinguish the metallic portion from the polymeric portion of the stent.La présente invention concerne un procédé d'imagerie comprenant une étape consistant à positionner un objet hétérogène (10), par exemple une endoprothèse métallique à revêtement polymère, au sein d'un dispositif (38) possédant une chambre (43). Ledit dispositif (38) comporte également une valve (50) lui permettant de recevoir un gaz et, normalement, d'isoler la chambre (43). Ainsi, l'objet (10) se trouve au sein de la chambre (43). Ensuite, le procédé comprend les étapes consistant à positionner le dispositif (38) au sein d'une zone active (24) d'un appareil de tomographie informatisé (18), à raccorder de façon fluidique une c
