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Technical Developments |
1 From the Department of Radiology, Stanford University School of Medicine, 300 Pasteur Dr, Stanford, CA 94305-5105. From the 2001 RSNA scientific assembly. Received April 7, 2002; revision requested June 11; final revision received January 18, 2003; accepted February 10. Supported by National Institutes of Health grants 5RO1HL58915 and 1RO1HL67194. Address correspondence to G.D.R. (e-mail: grubin@stanford.edu).
The authors developed and evaluated a method to produce curved-slab maximum intensity projections (MIPs) through blood vessels that semiautomatically excludes soft tissue and bone. Results obtained with the algorithm were compared with those obtained with rectangular-slab MIPs by using computed tomographic (CT) data from four patients with abdominal aortic aneurysms. Curved-slab MIPs exhibited increased mean vessel-toperivascular tissue contrast of 55.1 HU (36%), allowed a 10% increase in contrast-to-noise ratio, and decreased apparent vessel narrowing by 0.121.09 mm, without increasing processing time. Curved-slab MIPs may also include multiple vessels in a single image, thereby improving interpretation efficiency by reducing the number of MIPs required in these patients from eight to three.
Supplemental material: radiology.rsnajnls.org/cgi/content/full/2291020370/DC1
© RSNA, 2003
Index terms: Computed tomography (CT), angiography, 9*.129172 Computed tomography (CT), maximum intensity projection, 9*.12917
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