Extracts the UID portion of a study or series folder name (<prefix>_<uid>_<label>).
<prefix>_<uid>_<label>
The folder name.
The expected prefix, Study or Series.
Study
Series
The UID between the prefix and the first following underscore.
Extracts the UID portion of a study or series folder name (
<prefix>_<uid>_<label>).