The mnemonic
TDS
What each word stands for
- TTime: shorten exposure
- DDistance: dose falls with the square of distance
- SShielding: lead barriers and aprons
Why it matters clinically
The practical basis of ALARA for staff in X-ray and fluoroscopy rooms.
Where it stops being reliable
Does not give dose limits or the justification principle.
Teaching aid, still awaiting independent review. Confirm facts in a standard source.