It would be nice if the regular expression could be made less specific, but some features of your data format make that tricky (e.g. the fact that the value following "=>" can be a zero-length string).

However, I think it's pretty much guaranteed that there will be whitespace between the key/value pairs. Yet, you use /\s*/. Also, nowhere do I see specified that there even may be whitespace around the "=>" — you just made that up. As this file looks to be computer generated, I sincerely doubt that this will ever be the case. Finally: the only place do I see whitespace inside a column value, is in the final column of the line: the timestamp.

In short: I think this regex will do:

/^Collection=>(\S*) \s+ 
  ImageCount=>(\S*) \s+
  Status=>(\S*) \s+
  Missing=>(\S*) \s+
  Modified=>(.*\S) /x
[download]

And if you do this:

my %r = 
    /^ (Collection)=>(\S*) \s+ 
       (ImageCount)=>(\S*) \s+
       (Status)=>(\S*) \s+
       (Missing)=>(\S*) \s+
       (Modified)=>(.*\S)
    /x;
[download]

you even get a nice hash record out of it, even though it is restricted to one match per line (otherwise, when using /g you'd get list context, with a different behavior as a result.