Dosimeter Types
What dosimeter is the....
Most common device in diagnostic imaging & therapy?
Uses an aluminum oxide (Al₂O₃)?
Sensitive to exposures as low as 10 µSv or 0.01 mSv?
OSL (Optically Stimulated Luminescence)
Dosimeter placement Without apron?
On the front of the body, collar level.
What is the Annual whole-body EfD limit for occupational?
50 mSv
Which dosimeter Has......
No immediate readout?
Uses a ring badge is worn as a second monitor when performing radiographic procedures that require the hands to be near the primary X-ray beam?
Contains crystalline form (powder or small chips) of lithium fluoride (LiF)?
Typically worm as a secondary dosimeter?
Thermoluminescent dosimeter (TLD)
Dosimeter placement With apron?
Outside apron at collar level (primary).
What is the Cumulative EfD (CumEfD) for occupational?
limit= Age × 10 mSv
What dosimeter has......
-An immediate readout?
-Radiation ionizes the gas, and the charge is read electronically?
-Analyzed through computer software & Readout: via docking or reader device?
Direct Ion Storage (DIS)
Second Dosimeter monitor placement (under apron)?
At waist level, beneath wraparound apron.
Continuous/frequent EfD for the Public?
1 mSv/yr
What dosimeter looks like a fountain pen?
-Radiation interacts w/ gases in an ionization chamber to produce a readout indicative of the intensity?
-Primarily used in interventional procedures: Nuclear Medicine?
-Expensive $150?
Pocket Dosimeter/ Pocket Ionization Chamber Dosimeter
Dosimeter placement for a Pregnant technologist?
Primary at collar; Secondary fetal monitor at abdomen.
What is the public Infrequent EfD exposure?
5 mSv/yr
Dosimeter placement for Extremity exposure?
TLD ring badge worn on hand near beam
What is the Genetically Significant Dose (GSD) for the population?
GSD=U.S. 0.20 mSv.