Original X-ray image
+ Region Of Interest (ROI)

7x ROI
before enhancement
with noise filter applied

7x ROI
after enhancement
with noise filter applied

7x ROI
after enhancement
with annotation for measurement

Width = 6.62 ± 0.02 pixels,
Length = 64.81 ± 0.02 pixels.
Absolute measurement would be possible if calibrated with a known width either in-plane or between planes.