Rules of Twos?
- Two views—one view is always one view too few
- Two abnormalities—if you see one abnormality, check for a second one
- Two joints—image the joint above/below
- Two sides—if not sure or difficult X ray, compare with opposite side
- Two views, too many- CT scan has advantage in many situations.
- Two occasions—always compare with old Xrays IF available
- Two visits—Don’t hesitate to ask patient to visit again for a repeat exam
- Two opinions and two records—always ask a colleague if in doubt and make a record
- Two Specialists: Don’t hesitate to get an opinion from another dept(Radiology/Surgery)
- Two investigations—always consider whether US, CT or MRI would help in diagnosis
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