It happens that a patient has multiple Pet-Ct studies and the physician wants to see the changes between the different studies. In this case multiple studies are read from the database where the studies can be several months apart from each other. A separate Pet-Ct viewer is started on each study and the N windows are positioned next to each other (however the physician chooses to position them). Now he/she would like to step through all the studies in the axial, coronal or sagital views such that the slices in all studies step together.
To do this one uses the double arrow key:
.
Pressing on this will bring a small box with spinner keys. (As with all
dialogs, this too may be resized if the spinner keys are too small.) Drag the dialog box to a convenient spot off to
the side. Then press the double arrow key on the additional studies which need to be synchronized.
Then, pressing the spinners will scroll through the slices on all studies
where the double arrow key has been activated.
You will see the number in the box either increasing or decreasing depending if you pressed the up or down spinner. One advantage of the box is you may jump multiple slices. For example if you have already scrolled up to slice 25, you may type 0 in the window, hit Enter and all slices will jump back to their starting positions.
The
is also available on Display 3 view and it works in a similar way. The
difference here is there are 3 views: axial, coronal and sagital and it
isn't obvious which one you want to scroll. It will begin with the
axial view, but clicking on another view will change the scrolling to
that view.
You may also make a combination of Pet-Ct viewer with Display 3 view, for example, by choosing the unattenuated slices and displaying the unattenuated slices in the Display 3 view. Then you can switch back to attenuation corrected slices in Pet-Ct. Now you can synchronize the viewing of attenuation corrected with non attenuation corrected slices.
Note:
Since the dialog with
the spinner is small, if you click on your parent study, it can end up
"behind" the study where you can't see it. This is the reason it is
suggested moving it off to the side. If it falls behind the study, you
can either move the parent off to the side, or you may unclick and then
click again .
This trick will bring it again to the front.