TY - GEN
T1 - A new approach to reconstructing images in fan-beam computed tomography
AU - Yu, Lifeng
AU - Pan, Xiaochuan
AU - Pelizzari, Charles
AU - Pan, Tinsu
N1 - Publisher Copyright:
© 2002 IEEE.
PY - 2002
Y1 - 2002
N2 - The hybrid algorithm developed previously for image reconstruction in fan-beam computed tomography (CT) can have more desirable noise properties and computational efficiency in comparison with the fan-beam filtered backprojection (FFBP) algorithm. However, the one-dimensional (1D) explicit interpolation along the radial direction involved in the previous hybrid algorithm can lead to a reduced resolution in the reconstructed image. In this work, we proposed a new hybrid algorithm that eliminates such an explicit 1D interpolation by performing the filtration directly in the data space. We used computer simulation studies to evaluate the relative performance of the new hybrid algorithm, the previous hybrid algorithm, and the FFBP algorithm. The results of these studies demonstrated that these reconstruction algorithms respond to the effects of data noise and aliasing differently, and that the image noise properties also are dependent on the fan-beam configurations. For fan-beam configurations with small focal lengths and large size of the field of view which can be used in micro-CT, the new hybrid algorithm appears to provide a good tradeoff between image resolution and image noise uniformity.
AB - The hybrid algorithm developed previously for image reconstruction in fan-beam computed tomography (CT) can have more desirable noise properties and computational efficiency in comparison with the fan-beam filtered backprojection (FFBP) algorithm. However, the one-dimensional (1D) explicit interpolation along the radial direction involved in the previous hybrid algorithm can lead to a reduced resolution in the reconstructed image. In this work, we proposed a new hybrid algorithm that eliminates such an explicit 1D interpolation by performing the filtration directly in the data space. We used computer simulation studies to evaluate the relative performance of the new hybrid algorithm, the previous hybrid algorithm, and the FFBP algorithm. The results of these studies demonstrated that these reconstruction algorithms respond to the effects of data noise and aliasing differently, and that the image noise properties also are dependent on the fan-beam configurations. For fan-beam configurations with small focal lengths and large size of the field of view which can be used in micro-CT, the new hybrid algorithm appears to provide a good tradeoff between image resolution and image noise uniformity.
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U2 - 10.1109/ISBI.2002.1029388
DO - 10.1109/ISBI.2002.1029388
M3 - Conference contribution
AN - SCOPUS:84948707962
T3 - Proceedings - International Symposium on Biomedical Imaging
SP - 832
EP - 835
BT - 2002 IEEE International Symposium on Biomedical Imaging, ISBI 2002 - Proceedings
PB - IEEE Computer Society
T2 - IEEE International Symposium on Biomedical Imaging, ISBI 2002
Y2 - 7 July 2002 through 10 July 2002
ER -