x-ray study in a sentence

1. Crystallization and preliminary x - ray studies of metallothionein - ii from rabbit liver
2. An transcranial doppler ultrasonography and x - ray study of cervical vertigo patients treated by manipulation in supine position
3. We found that they all had good reduction of subluxation after use of this modified shoulder sling in x - ray study and can make good use of distal wrist and hand
4. It's difficult to find x-ray study in a sentence.