Special Imaging Modes
11-3
11.1.1.2 ROI & VOI
Before image acquisition after the system enters 3D/4D mode, a B image with ROI
displays on the screen. A broken line (shown in the following figure) that shows the upper
edge position of VOI is inside ROI; its length is the same as the width of ROI.
z ROI size and position
Roll the trackball to change the ROI size and position, press the <Set> key to
toggle between setting the size (solid line) and position (dotted line, with a small
box at each corner of ROI).
z Curved VOI adjustment
Roll the trackball to change the curved VOI position, press <Set> key to switch
among the state of changing ROI and curve VOI.
This function is to change the curved shape of the nearest VOI section, to
facilitate observation for the interested volume data.
It can be adjusted both in acquisition preparation status, and in A, B, C sections
of review status.
NOTE: To define a ROI, please try to cut the useless data as to reduce the volume data,
shortening the time for image storing, processing and rendering.
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