CT-scan in the case of ulnar<unk>  fracture is the best modality if you can not have an exclusive diagnosis by X-ray itself can not be made.
Ulnar bone fracture CT scan
Ulnar bone fracture MRI
Ulnar bone fracture x ray
Distal radius fracture CT
Distal radius fracture MRI
Ulnar fracture x ray
Distal radius fracture x ray
Distal radius fracture physical examination