Fraunhofer-Institut für Produktionsanlagen und Konstruktionstechnik IPK

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A geometric calibration method for an open cone-beam CT system

2013 , Stopp, Fabian , Wieckowski, Adam , Käseberg, Marc , Engel, Sebastian , Fehlhaber, Felix , Keeve, Erwin

The image quality of cone-beam CT systems depends directly on the precise knowledge of position and orientation of the X-ray source and the detector. The current methods to determine this geometric information are mainly focused on conventional cone-beam CTs with planar or near-planar scanning trajectories. Due to the fixed alignment of X-ray source and detector, such systems have disadvantages in intraoperative use. Therefore, we develop a first prototype for cone-beam CT characterized by a free alignment of X-ray source and detector. This results in an open system allowing an intraoperative access to the patient and the implementation of non-planar scanning trajectories in the operating room. In this paper, we present a geometric calibration method to determine the position and orientation of X-ray source and detector for any arbitrary projection. Enhancing the theoretical method proposed in Mennessier et al. [1] by introducing an asymmetrical marker arrangement, we realized a calibration method suitable for practical use. We analyzed the resulting accuracy and applied our approach to the open cone-beam CT prototype.

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SIRO: Simulation software for robot based intraoperative cone beam computed tomography

2012 , Käseberg, Marc , Stopp, Fabian , Melnik, S. , Winne, Christian , Keeve, Erwin

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Concept of a movable flat panel detector for X-ray imaging during surgical interventions

2012 , Engel, S. , Käseberg, Marc , Stopp, Fabian , Fehlhaber, Felix , Keeve, Erwin

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A projection access scheme for iterative reconstruction algorithms based on a reconstruction quality function

2011 , Käseberg, Marc , Stopp, Fabian , Winne, Christian , Keeve, Erwin

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Ein Verfahren zur Kalibrierung von Operationsmikroskopen für chirurgische Augmented-Reality Anwendungen

2012 , Winne, Christian , Stopp, Fabian , Reutter, Andreas , Keeve, Erwin

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Simulation of clinical applications for intraoperative CBCT system concepts

2012 , Käseberg, Marc , Stopp, Fabian , Engel, S. , Fehlhaber, Felix , Keeve, Erwin

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Intraoperative Mensch-Maschine-Interaktion zur 3D-Röntgenbildgebung

2011 , Stopp, Fabian , Käseberg, Marc , Winne, Christian , Fehlhaber, Felix , Keeve, Erwin

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Experimental evaluation of metal artifacts for an orbital image recording method for cone beam computed tomography

2012 , Stopp, Fabian , Käseberg, Marc , Winne, Christian , Engel, S. , Fehlhaber, Felix , Keeve, Erwin

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Development and evaluation of a calibration method of an orbital x-ray imaging concept

2012 , Keeve, Erwin , Fehlhaber, Felix , Stopp, Fabian , Käseberg, Marc , Winne, Christian

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ORBIT - Open X-ray scanner for image-guided interventional surgery - development of concept

2011 , Stopp, Fabian , Käseberg, Marc , Winne, Christian , Marx, Björn , Dehler, Jürgen , Keeve, Erwin

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