Keywords:
image acquisition, alternative scan trajectory, circular tomosynthesis, scatter radiation distribution
Modern interventional X-ray devices are highly maneuverable and allow complex 3D imaging trajectories. New scan trajectories enable not only optimized object sampling but also introduce new approaches for dynamic 3D imaging. In this paper, we investigated the scatter radiation of two different scan trajectories. The scatter radiation was sampled by a rail setup with dosimeters at defined positions. After data analysis, contour maps were generated which show for four exemplary heights the scatter radiation distribution. The alternative scan trajectory showed smaller dose exposures at heights correlated to upper torso and head areas of a model physician.
- Khanlian Chung
- University of Heidelberg, Germany
- Lennart Karstensen
- Fraunhofer Institute for Manufacturing Engineering and Automation, Germany
- Marius Siegfarth
- Fraunhofer Institute for Manufacturing Engineering and Automation, Germany
- Lothar R. Schad
- University of Heidelberg, Germany
- Frank G. Zöllner
- University of Heidelberg, Germany
- Hermann Schomberg (Hamburg) 4753 2001 Jan 16 14:15:42, “Complete Source Trajectories for C-Arm Systems and a Method for Coping with Truncated Cone-Beam Projections,”
- J. D. Pack, F. Noo, and H. Kudo, “Investigation of saddle trajectories for cardiac CT imaging in cone-beam geometry,” Phys. Med. Biol., vol. 49, no. 11, pp. 2317–2336, 2004.
- K. Khare, B. E. H. Claus, and J. W. Eberhard, “Tomosynthesis imaging with 2D scanning trajectories,” in : SPIE, 2011, p. 796115.
- B. E. Claus, D. A. Langan, O. Al Assad, and X. Wang, “Circular tomosynthesis for neuro perfusion imaging on an interventional C-arm,” in : SPIE, 2015, 94122A.
- L. A. Feldkamp, L. C. Davis, and J. W. Kress, Practical cone-beam algorithm, vol. 1.
- J. T. D. Iii and D. J. Godfrey, “Digital x-ray tomosynthesis: current state of the art and clinical potential,” (en), Phys. Med. Biol., vol. 48, no. 19, pp. R65, 2003.
- L. Helfen et al., “High-resolution three-dimensional imaging of flat objects by synchrotron-radiation computed laminography,” Appl. Phys. Lett., vol. 86, no. 7, p. 71915, 2005.
- F. Xu, L. Helfen, T. Baumbach, and H. Suhonen, “Comparison of image quality in computed laminography and tomography,” (eng), Optics express, vol. 20, no. 2, pp. 794–806, 2012.
- K. Chida et al., “Occupational dose in interventional radiology procedures,” (eng), AJR. American journal of roentgenology, vol. 200, no. 1, pp. 138–141, 2013.