OrthoDisplay Properties

use to switch the OrthoDisplay’s cross marker on and off. The cross marker indicates the cut position, i.e. the intersection line of the three slices shown on the transaxial, coronal and sagittal display parts.

determines the color of the cross marker.

use to switch the cross marker’s shadow on and off. An activated shadow increases the cross marker’s visibility.

determines the color of the cross marker’s shadow. It is best to use a color with a high contrast to the foreground color.

optionally render the cross marker’s center invisible.

determines the size of the transparent / invisible region in the cross marker center.

The values are given in pixels for all three coordinates (x, y, z). On the transaxial part of the OrthoDisplay the (x, y) pair is relevant, on the coronal part the (x, z) pair and on the sagittal part the (y, z) pair.

this is the size of the display parts of the current OrthoDisplay.

this triple determines the resolution of the sampling of the 3D image volume into the 2D image sampling-result-slices.

Vinci features three sampling methods: trilinear, next-neighbour and TruePixel interpolation. The latter method limits zooming to pixel-reduplication - no interpolation will be used. Thus this mode is suitable if you need to be sure to work with original or raw data.

This is the size of the final image slices that are used to evaluate ROIs and Profiles - these slices are independent of the size of the display(s) on which they are later shown.

The 3D sampling resolution is related to a square matrix with a size of 4, 8, 16, 32, 64, 128, 256, 512, 768, 1024, 1280, 1536, 1792 or 2048 pixels in each direction. It is less than or equal to the image matrix size. If the sampling result-slices are smaller than the image matrix size, they are zoomed to the image matrix size before they are displayed. Vinci uses a high resolution B-spline method in the trilinear case and simple pixel-reduplication for the next-neighbour and TruePixel interpolation for this operation. In Vinci 3.x, the sampling resolution is an image property, it is the same for all displays showing the same image.

The display size can have the values 64 and 128 pixels on PlanesView and 256, 512, 768, 1024, 1280, 1536, 1792 and 2048 pixels on both Ortho- and PlanesView. The image matrix can have the values 256, 512, 768, 1024, 1280, 1536, 1792 and 2048 pixels. If the display size is different from the image matrix size the final image slices are shrunken or expanded as necessary using Qt’s built-in bilinear interpolation if originally trilinear-sampled or pixel-reduplication if originally next-neighbour- or TruePixel-sampled. The image matrix size is, of course, also an image property.

Wherever you see an image on a display (normal or Zoomed OrthoView, normal or Zoomed PlanesView), what you see comes from a common source, and ROIs and Profiles are computed from the same common source, the final image slices with the dimension of the image matrix size.

In the Vinci 2.x series, ROIs and Profiles were computed from the pixel-values shown on the display in sampling resolution. As the sampling resolution could be different for each display, you could have got different ROI statistics on e.g. normal and Zoomed OrthoViews.