Modified maximum intensity projection display of MR angiograms with hybrid order interpolation and pre-zooming

Chi-Yin Lee; Christopher H. Wood

doi:10.1117/12.207662

27 April 1995 Modified maximum intensity projection display of MR angiograms with hybrid order interpolation and pre-zooming

Chi-Yin Lee, Christopher H. Wood

Author Affiliations +

Proceedings Volume 2431, Medical Imaging 1995: Image Display; (1995) https://doi.org/10.1117/12.207662
Event: Medical Imaging 1995, 1995, San Diego, CA, United States

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.

Citation Download Citation

Chi-Yin Lee and Christopher H. Wood "Modified maximum intensity projection display of MR angiograms with hybrid order interpolation and pre-zooming", Proc. SPIE 2431, Medical Imaging 1995: Image Display, (27 April 1995); https://doi.org/10.1117/12.207662

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