create a longitudinal xray view

[ebrahimebrahim]

Rather than just showing one xray at a time, we need to be able to show a time series of xrays in some way. There could be tens of xrays for just one subject, with one or two xrays taken per day at the NICU. Say there are 30 xrays, then you wouldn't want to display all 30 xrays at once, but it should be possible to view more than one at a time, and it should be easy to scroll through all 30.

This relies on #16, because we need the app to have a notion of "the collection of xrays for the currently selected patient"

This also relies on #14 so that we have a place in the UI to put the longitudinal xray view.

[ebrahimebrahim]

In a meeting today with our cnmc research friends, we discussed what this view could look like. Here are some suggestions that came up for a longitudinal-focused x-ray view:

• perhaps left/right arrows with an option of left/right keyboard controls to scroll through a patient's xrays through time
• definitely a vertical selector would be intuitive for those who are familiar with a standard radiologist's interface
• selector could be in the module panel on the left, but since the panel may be busy with other patient controls perhaps the xray selector could be within the top half of the main view next to where the xray is displayed

[ebrahimebrahim]

extra idea: split the top half of the main view to allow side by side comparison. E.g. the current selected time point xray in the center, with past and future to the left and right of it.

(We may run into issues when trying to visualize more than one "image data" at the same time due to volview's limitations. So we may or may not include this, or we may have to extend functionality in volview core itself.)