Research project

Volume-of-interest (VOI) imaging in C-arm angiography

VOI imaging is able to dramatically reduce the radiation dose required for 3-D interventional imaging. The huge dose reduction comes from the fact that only a small proportion of the patient is being imaged. Through these significant savings, it is possible to use 3-D imaging multiple times during an intervention which enables improved management in difficult interventions.

VOI imaging can be used for both fluoroscopy and for the 3-D imaging. A significant problem with this is that the imaging has many parameters. So far it is not clear how to define location and size of the VOI, without disrupting the clinical workflow. Another problem is that until now the technical capabilities of our angiography systems are not used to their full extent. As a result, many new applications and scan protocols are possible and have the potential to improve clinical workflow.

For these reasons, it is useful to examine the possibilities of VOI imaging. It is subdivided into three fields:
(A) Enhanced 3-D VOI reconstruction
(B) Acquisition with dynamic adaptation of the collimation
(C) Use of prior knowledge to improve the image quality

Project manager:
Prof. Dr.-Ing. Joachim Hornegger, Prof. Dr.-Ing. habil. Andreas Maier, Dr.-Ing. Sebastian Bauer

Project participants:
Dr.-Ing. Yan Xia

Keywords:
VOI reconstruction; dose reduction; C-arm CT

Duration: 1.8.2012 - 31.7.2014

Sponsored by:
Siemens AG, Healthcare Sector

Contact:
Xia, Yan
Phone +49 9131 85 27891, Fax +49 9131 85 27270, E-Mail: yan.xia@cs.fau.de

Publications

Xia, Yan ; Maier, Andreas ; Dennerlein, Frank ; Hofmann, Hannes ; Hornegger, Joachim: Efficient 2D Filtering for Cone-beam VOI Reconstruction. In: IEEE (Ed.) : 2012 Proceedings of the IEEE Nuclear Science Symposium and Medical Imaging Conference (IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC) Anaheim, CA, USA 29.10-03.11.2012). 2012, pp 2415-2420.

Xia, Yan ; Maier, Andreas ; Dennerlein, Frank ; Hofmann, Hannes ; Müller, Kerstin ; Hornegger, Joachim: Reconstruction from Truncated Projections in Cone-beam CT using an Efficient 1D Filtering. In: SPIE (Ed.) : Proceedings of SPIE, Medical Imaging 2013 (SPIE Medical Imaging 2013 Orlando, FL, USA 09.02-14.02.2013). 2013, pp 86681C.
[doi>10.1117/12.2007484]

Xia, Yan ; Maier, Andreas ; Dennerlein, Frank ; Hofmann, Hannes ; Hornegger, Joachim: Scaling Calibration in the ATRACT Algorithm. In: Meinzer, Hans-Peter ; Deserno, Thomas Martin ; Handels, Heinz ; Tolxdorff, Thomas (Ed.) : Proceedings Bildverarbeitung für die Medizin 2013 (Bildverarbeitung für die Medizin 2013 Heidelberg, Germany 03.03-05.03.13). 2013, pp 104-109. - ISBN 978-3-642-36479-2
[doi>10.1007/978-3-642-36480-8]

Bier, Bastian ; Maier, Andreas ; Hofmann, Hannes ; Schwemmer, Chris ; Xia, Yan ; Struffert, Tobias ; Hornegger, Joachim: Truncation Correction for VOI C-arm CT using Scattered Radiation. In: Nishikawa, Robert ; Whiting, Bruce (Ed.) : Proceedings of SPIE Medical Imaging 2013: Physics of Medical Imaging (SPIE Medical Imaging 2013: Physics of Medical Imaging Lake Buena Vista, Florida, USA 09.-14.02.2013). Vol. 8668. 2013, pp 86682F-86682F9.
[doi>10.1117/12.2007486]

Xia, Yan ; Maier, Andreas ; Dennerlein, Frank ; Hornegger, Joachim: Truncation Correction using a 3D Filter for Cone-beam CT. In: Fully3D (Ed.) : Fully3D 2013 (Fully Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine Lake Tahoe, California, USA 16.06-20.06.2013). 2013, pp 118-121.

Bier, Bastian ; Schwemmer, Chris ; Maier, Andreas ; Hofmann, Hannes ; Xia, Yan ; Hornegger, Joachim ; Struffert, Tobias: Convolution-Based Truncation Correction for C-Arm CT Using Scattered Radiation. In: Meinzer, Hans-Peter ; Deserno, Thomas Martin ; Handels, Heinz ; Tolxdorff, Thomas (Ed.) : Bildverarbeitung für die Medizin 2013 (Bildverarbeitung für die Medizin 2013 Heidelberg 03.-05.03.2013). Berlin Heidelberg : Springer, 2013, pp 338-343. (Informatik aktuell) - ISBN 978-3-642-36479-2
[doi>10.1007/978-3-642-36480-8_59]

Xia, Yan ; Dennerlein, Frank ; Maier, Andreas: Method for determining three-dimensional image of examination object, involves determining rear projections in three-dimensional area, where image of object and overlapping of rear projections are determined by computer. Schutzrecht DE201210210863 20120626 examined granted patent (13.06.2013)