![]() ![]() This will display the brightest objects, such as bone in a CT (computed tomographic) study. The value of the nearest non transparent point which the ray encounters is stored in the projection image.īrightest Point projection examines points along the rays, projecting the brightest point encountered along each ray. At each point in the projection plane, a ray passes normal to the plane through the volume. Select Nearest Point projection to produce an image of the surfaces visible from the current viewing angle. This routine was written by Michael Castle and Janice Keller of the University of Michigan Mental Health Research Institute (MHRI). The choice of projection method and the settings of various visualization parameters determine how both surface and interior structures will appear. ![]() ![]() Three methods are available for calculating the projections onto this plane: Nearest Point, Brightest Point, and Mean Value. Each ray projects a value onto the screen, or projection plane, based on the values of points along its path. To visualize this, imagine a field of parallel rays passing through a volume containing one or more solid objects and striking a screen oriented normal to the directions of the rays. Each frame in the animation sequence is the result of projecting from a different viewing angle. Generates an animation sequence by projecting through a rotating 3D data set onto a plane. Median creates an image containing the median value of the slices. Standard Deviation creates a real image containing the standard deviation of the slices. Sum Slices creates a real image that is is sum of the slices in the stack. Minimum Intensity projection ( Min) creates an output image each of whose pixels contains the minimum value over all images in the stack at the particular pixel location. Maximum Intensity projection ( Max) creates an output image each of whose pixels contains the maximum value over all images in the stack at the particular pixel location. The ZProject command creates image names in the form “XXX_stack”, where XXX is “AVG”, “MAX”, “MIN”, “SUM”, “STD” and “MED” and “stack” is the name of the stack.Īverage Intensity projection outputs an image wherein each pixel stores average intensity over all images in stack at corresponding pixel location. Six different projection types are supported. Projects an image stack along the axis perpendicular to image plane (the so-called “z” axis). ![]()
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