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Characterization of interpolation effects in cine anatomic and phase-velocity images

✍ Scribed by John C. Wood

Publisher
John Wiley and Sons
Year
2003
Tongue
English
Weight
243 KB
Volume
18
Category
Article
ISSN
1053-1807

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✦ Synopsis

Purpose:

To compare actual and predicted frequency response of reconstruction algorithms applied to anatomic and phase-contrast velocity cine images.

Materials and methods:

Anatomic and phase-contrast velocity segmented cine gradient echo images were collected from a stationary, doped-agarose phantom, using non-phase-contrast cine and phase-contrast cine with one to three directional encodings, one to 16 views per segment, and nearest-neighbor or linear interpolation. temporal power spectra from object pixels were fit to linear transfer function models; nearest-neighbor interpolation by a sinc function and linear interpolation by a sinc(2) function.

Results:

Simple linear transfer function models predicted >98% of the observed power spectral variation. finite word effects produced small systematic differences at high temporal frequency.

Conclusion:

Temporal power spectra of cine images collected from stationary objects completely characterizes low pass filtration effects of interpolation.

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