Review Game - Radiation Monitoring

Who should wear a 2nd badge and where should it be worn?

1. Pregnant workers - Under apron @ waist level

2. People working in high levels of radiation such as vascular procedures - Ring Badge for hands

What is the sensing material in an OSL dosimeter?

Aluminum Oxide

Which radiation monitoring device gives immediate readout via the internet connection and looks like a flash drive?

Direct Ion Storage Dosimeter

What is the sensing crystal in a TLD dosimeter?

Lithium Fluoride

When is it REQUIRED to have occupational radiation monitoring?

1. 1/10th the of occupational dose limit

2. 1/10th of 50 mSv is 5 mSv

What is the sensing material in a film badge?

Film

True or False: Medical imaging personnel dose is from background, medical, and occupational exposure

False

Leakage from the x-ray tube must not exceed ___

100 mR per hour

Which dosimeters give immediate reading?

1. Pocket Ionization

2. Direct Ion Storage

What is the reason they use filters in dosimeters?

To measure radiation quality

What is the true measure of beam quality?

HVL

What is the most used dosimeter and the second most sensitive?

OSL

What is the most sensitive dosimeter?

Pocket Ionization

Which dosimeters are operated by stimulated luminescence?

1. OSL

2. TLD

The TLD emits light in response to being stimulated by what?

Heat

The OSL emits light in response to what?

Blue laser light

True or False: The control badge is used to record radiation received during transit, storing, and handling

True

EfD for radiographers is used to decrease chances of what?

Stochastic cancer risk

What type of chamber is a Geiger Muller? What is happening within the chamber?

1. Ionization chamber

2. Ionization of air occurs within the chamber

Ionization chambers used to measure air kerma will show results in what unit?

Gy

Is DDE, LDE, or SDE most used to determine cancer or stochastic risk?

DDE

Is DDE, LDE, or SDE most used to determine risk to the skin?

SDE

Is DDE, LDE, or SDE most used to determine cataracts?

LDE

What is the main use of radiation survey equipment?

Evaluate radioactive contamination (nuclear medicine spills)

If you are trying to find gamma radionuclides what category of instruments/detectors would be the best to use?

Ionization Chamber

Where should the dosimeter be worn?

Outside of lead, collar level, anterior

When radiation quantities are state in units per second, minute, or hour that is known as...?

Exposure rate

What is the SI unit for radioactivity?

Bq

What does OSL stand for?

Optically Stimulated Luminescence

What does TLD stand for?

Thermoluminescent dosimeter

Does the Cutie Pie have an ionization chamber?

Yes

Which survey meters response differently to different photon energies?

GM (Geiger Muller)

What is an OSL used to monitor?

1. Pregnant workers

2. Workers in low level radiation

Which dosimeter resembles a pen and has air as the sensing material?

Pocket Ionization

Which survey meter keeps a source of radiation on the side to check its consistency daily?

GM (Geiger Muller)

What is an electrometer and which dosimeter is ready by it?

Measures electric charge from a Pocket Ionization dosimeter

A GM survey meter only measures ___

Exposure rates

What is inside of a GM survey meter?

Filled with gas or air

Which dosimeter is used in nuclear power plants because of its immeidate readout?

Pocket Ionization

What is the biggest advantage of a TLD?

Responds similarly to human tissue

What is the longest amount of time the OSL, TLD, Film Badge, and Pocket Ionization can be worn?

1. OSL - 1 year

2. TLD - 3 months

3. Film Badge - 1 month

4. Pocket Ionization - Daily

What is the cheapest dosimeter?

Film Badge

Which survey meter has an audible alert?

GM

What is the biggest disadvantage of the TLD?

Can only be read once because it is destroyed by heat after it's been read

What is the biggest disadvantage of a film badge?

Can be skewed by heat and humidity

OSL can detect radiation as low as ___

1 mrem

What is the main disadvantage of OSL>

Cannot be read on the day of occurrence