
Proceedings Paper
Real time implementation of distortion corrections for a tiled EMCCD-based solid state x-ray image intensifier (SSXII)Format | Member Price | Non-Member Price |
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Paper Abstract
The new Solid State X-ray Image Intensifier (SSXII) is being designed based on a modular imaging array of Electron
Multiplying Charge Couple Devices (EMCCD). Each of the detector modules consists of a CsI(Tl) phosphor coupled to
a fiber-optic plate, a fiber-optic taper (FOT), and an EMCCD sensor with its electronics. During the optical coupling and
alignment of the modules into an array form, small orientation misalignments, such as rotation and translation of the
EMCCD sensors, are expected. In addition, barrel distortion will result from the FOTs. Correction algorithms have been
developed by our group for all the above artifacts. However, it is critical for the system's performance to correct these
artifacts in real-time (30 fps). To achieve this, we will use
two-dimensional Look-Up-Tables (LUT) (each for x and y
coordinates), which map the corrected pixel locations to the
acquired-image pixel locations. To evaluate the feasibility of
this approach, this process is simulated making use of parallel coding techniques to allow real-time distortion corrections
for up to sixteen modules when a standard quad processor is used. The results of this simulation confirm that tiled
field-of-views (FOV) comparable with those of flat panel detectors can be generated in ~17 ms (>30 fps). The increased FOV
enabled through correction of tiled images, combined with the EMCCD characteristics of low noise, negligible lag and
high sensitivity, should make possible the practical use of the SSXII with substantial advantages over conventional
clinical systems. (Support: NIH Grants R01EB008425, R01NS43924, R01EB002873)
Paper Details
Date Published: 13 March 2009
PDF: 11 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72583B (13 March 2009); doi: 10.1117/12.813603
Published in SPIE Proceedings Vol. 7258:
Medical Imaging 2009: Physics of Medical Imaging
Ehsan Samei; Jiang Hsieh, Editor(s)
PDF: 11 pages
Proc. SPIE 7258, Medical Imaging 2009: Physics of Medical Imaging, 72583B (13 March 2009); doi: 10.1117/12.813603
Show Author Affiliations
Christos Keleshis, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
K. R. Hoffmann, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
J. Lee, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
H. Hamwi, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
W. Wang, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
K. R. Hoffmann, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
J. Lee, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
H. Hamwi, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
W. Wang, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
C. N. Ionita, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
D. R. Bednarek, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
A. Verevkin, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
S. Rudin, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
D. R. Bednarek, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
A. Verevkin, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
S. Rudin, Toshiba Stroke Research Ctr., Univ. at Buffalo (United States)
Published in SPIE Proceedings Vol. 7258:
Medical Imaging 2009: Physics of Medical Imaging
Ehsan Samei; Jiang Hsieh, Editor(s)
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