𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fast Fourier projection for MR angiography

✍ Scribed by Sandy Napel; Shane Dunne; Brian K. Rutt

Book ID
102952351
Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
789 KB
Volume
19
Category
Article
ISSN
0740-3194

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✦ Synopsis

We have developed a technique called fast Fourier projection which rapidly produces projections through images and is particularly useful for generating MR angiograms. Based on the projection-slice theorem of Fourier transform theory, this method extracts planes from three-dimensional spatial frequency space and computes projections at arbitrary viewing angles by two-dimensional inverse Fourier transformation. Typical computation times are on the order of 1 s per projection. This performance makes possible interactive selection of optimal projection directions for visualizing the desired vasculature in single or stereo-pair angiographic images and drastically reduces the time required to generate sequences of projections for display in movie loops compared to the conventional ray-casting approach. The method is easily implemented on off-line workstations or directly on MRI computer systems.

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