MPR (multi-planar reconstruction) review function. After this
button is activated, the 3D volume is hidden and two
perpendicular lines appear on the selected quadrant. These
two lines are color matched with the other 2 MPR quadrants
and show where the three planes intersect. Move trackpad
left/right or up/down to change location of lines and
intersection on the MPR’s. Moving one line will move the
other perpendicular line.