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. 2005 Feb;26(2):313–318.

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Fig 1. — Opacity charts of the signal intensity distribution for the 3D MR cisternograms.

A, Opacity chart for the conventional 3D MR cisternogram, showing a square curve with a threshold range of 100–500 (100% opacity level), and color-rendered in green (threshold range 100–490) and red (490–500).

B, Opacity chart for the transparent 3D MR cisternogram, showing square curves, one with a threshold range of 480–500 (100% opacity level), color-rendered in green (threshold range 480–490) and red (490–500), and the other with a threshold range of 100–250 (100% opacity level), color-rendered in blue.