BUG: Element numbers 1053, 1052 not hex

Richard Frank <rfrank@dominionsw.com> recognized
that the codes were not specified in the required
hex notation.

Change-Id: Ie116d4c4fe27c158789e5e771cac050a66a6e4f6
Merge topic 'DCMTKSlopeFix'

6d3ee28f BUG: Element numbers 1053, 1052 not hex