[This is preliminary documentation and is subject to change.]
Compare the DICOM files in the two directories based on there being corresponding
files in each directory with the same attribute value for the matching Tag.
- directory1 (String)
- Full directory name of first directory.
- directory2 (String)
- Full directory name of second directory.
- matchingTag (Tag)
- DICOM Tag value to match in a file in each directory.
Total number of differences between compared files.