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Proceedings Paper

Modified maximum intensity projection display of MR angiograms with hybrid order interpolation and pre-zooming
Author(s): Chi-Yin Lee; Christopher H. Wood
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Paper Abstract

Maximum intensity projection (MIP) is widely used in obtaining 2D projections (angiograms) of MR angiographic (MRA) data. The flowing blood appears bright and the stationary tissues show up dark in the data. With the MIP algorithm, parallel rays are cast through the MR slices (image volume) and the maximum intensity along each ray is displayed in the projection image. In the ray casting process, conventional methods resample the image volume at evenly spaced locations along the projection ray using either the nearest neighbor method or the 3D tri-linear interpolation method. High order interpolation is expected to give a more accurate approximation in resampling but with higher computational cost. In this paper, we introduce a low cost modified MIP algorithm, which enjoys the performance of using higher order interpolation, and gives projection image with better contrast, higher vessel continuity and visibility and less jagged vessel artifacts than the conventional methods. Besides, in order to increase the spatial resolution of the projection image, methods such as pre-zooming before the MIP, post-zooming after the MIP and sampling the projection image at higher rate are discussed and compared.

Paper Details

Date Published: 27 April 1995
PDF: 9 pages
Proc. SPIE 2431, Medical Imaging 1995: Image Display, (27 April 1995); doi: 10.1117/12.207662
Show Author Affiliations
Chi-Yin Lee, Picker International, Inc. (United States)
Christopher H. Wood, Picker International, Inc. (United States)

Published in SPIE Proceedings Vol. 2431:
Medical Imaging 1995: Image Display
Yongmin Kim, Editor(s)

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