Online OsiriX Documentation/Using 2-D thick slabs

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OsiriX supports a 2D thick slab mode in the 2D viewer. This mode is particularly interesting if you are working with multi-slice CT. It will allow you to navigate more efficiently through a huge series.

Thick slab mode is controlled in the tool bar:

Thick Slab controller

There are actually 3 modes:

  • Mean: all slices are added and the mean is computed.
  • Maximum Intensity: maximum intensities of all pixels are extracted and displayed.
  • Minimum Intensity: minimum intensities of all pixels are extracted and displayed.

You control the number of slices with the slider. You can view the thick slab information in the lower left hand corner of the window:

Images 1 to 9 are displayed, and the total thickness is 27 mm.

For more information about thick slab, read the following articles:

  1. Gruden JF, Ouanounou S, Tigges S, Norris SD, Klausner TS. Incremental benefit of maximum-intensity-projection images on observer detection of small pulmonary nodules revealed by multidetector CT. AJR Am J Roentgenol 2002 Jul;179(1):149-57.
  2. Coakley FV, Cohen MD, Johnson MS, Gonin R, Hanna MP. Maximum intensity projection images in the detection of simulated pulmonary nodules by spiral CT. Br J Radiol. 1998 Feb;71(842):135-40.
  3. Remy-Jardin M, Remy J, Giraud F, Marquette C-H. Pulmonary nodules: detection with thick-section spiral CT versus conventional CT. Radiology 1993;187:513–520.

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