MAG4 INDEX GET EVENT    ICR (5557)

This call will return an array of entries from the
IMAGE INDEX FOR PROCEDURE/EVENT (#2005.85) file based on the input parameters
CLS (Class) and SPEC (Specialty/subspecialty). When images are displayed, it
is desirable to limit the list of presented images to only those that are
likely to be relevant in the current context.

This procedure accepts an "image category" (either an IEN or the name of a
category) and returns all "image events" that belong to that category.