TY - GEN
T1 - Correction of image intensifier distortion for three-dimensional x-ray angiography
AU - Schueler, Beth A.
AU - Hu, Xiaoping
PY - 1995
Y1 - 1995
N2 - An algorithm has been developed to correct spatial distortion in image intensifier-based projections for three-dimensional (3D) angiographic reconstruction. A piecewise spatial warping technique is used to calculate a set of correction lookup tables which store the row and column subpixel spatial shifts, based on a reference grid image. Pixel amplitudes in the corrected image are determined from bilinear interpolation of the four surrounding pixels in the observed image. The method has been tested using an x-ray imaging chain with a 30-cm image intensifier positioned at various angular orientations and x-ray source distances. Prior to distortion correction, the maximum error between observed and expected reference point locations was found to be 14 mm. After correction, the maximum and mean errors were 0.23 mm and 0.053 mm, respectively.
AB - An algorithm has been developed to correct spatial distortion in image intensifier-based projections for three-dimensional (3D) angiographic reconstruction. A piecewise spatial warping technique is used to calculate a set of correction lookup tables which store the row and column subpixel spatial shifts, based on a reference grid image. Pixel amplitudes in the corrected image are determined from bilinear interpolation of the four surrounding pixels in the observed image. The method has been tested using an x-ray imaging chain with a 30-cm image intensifier positioned at various angular orientations and x-ray source distances. Prior to distortion correction, the maximum error between observed and expected reference point locations was found to be 14 mm. After correction, the maximum and mean errors were 0.23 mm and 0.053 mm, respectively.
UR - http://www.scopus.com/inward/record.url?scp=0029463591&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029463591&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:0029463591
SN - 0819417807
SN - 9780819417800
T3 - Proceedings of SPIE - The International Society for Optical Engineering
SP - 272
EP - 279
BT - Proceedings of SPIE - The International Society for Optical Engineering
A2 - Van Metter, Richard L.
A2 - Beutel, Jacob
T2 - Medical Imaging 1995: Physics of Medical Imaging
Y2 - 26 February 1995 through 27 February 1995
ER -