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Capstone RadPro

Radiation Exposure & Monitoring

QuestionAnswer
What is exposure (X) measured in using the International System? coulombs per kilogram (C/kg)
What is exposure (X) measured in using the British System? roentgen (R)
According to the NCRP, the annual occupational whole-body dose equivalent limit is? 50mSv
What is the formula for the cumulative effective dose limit? 10mSv x age = CumEfD
According to the NCRP, what is the equivalent dose limit for the lens of the eye? 150mSv
What is the equivalent dose limit for skin, hands and feet? 500mSv
Determine the cumulative effective dose (CumEfD) to the whole body of an occupationally exposed person who is 27 years old? 270mSv
A TLD (thermoluminescent) dosimetry system uses what type of crystals? Lithium Fluoride (LiF)
An OSL (optically stimulated luminescence) dosimeter contains what type of detectors? Aluminum Oxide (Al2O3)
Which personnel monitoring device is considered most sensitive and accurate? OSL
Which type of monitoring device do photons release electrons by their interaction with air? Pocket Dosimetry
What are the two types of dosimeters? Personnel & Survey
Name the 4 Personnel types of dosimeters. 1. OSL 2. Film Badge 3. TLD 4. Pocket Ionization Chamber
Name the 3 Survey types of dosimeters. 1. Cutie Pie (aka ionization chamber-type survey meter) 2. Proportional Counter 3. GM Detector (Gieger-Muller)
Which dosimeter is most common in diagnostic imaging? OSL
Which dosimeter is most sensitive, yet uncommon? Pocket Ionization Chamber
Which dosimeter provides immediate exposure readouts? Pocket Ionization Chamber
Which dosimeter can be used to locate a lost radioactive source or low level radioactive contamination? GM dosimeter
What is Collective Effective Dose (ColEfD) used for? It describes population/group exposures from low doses of multiple sources of ionizing radiation.
What unit is ColEfD measured in? person-sievert (person-Sv)
What is the recommended annual EfD for background radiation (not including medical exams)? background radiation (including ionizing radiation exams)? Background radiation (not including medical exams) - 1mSv Background radiation (including ionizing radiation exams) - 5mSv
Equivalent dose limits for tissues and organs - lens of the eye? localized areas of the skin, hands, and feet? Lens EqD limit - 15mSv Skin, hands, and feet EqD limit - 50mSv
What is the EqD limit for a fetus/embryo - monthly? entire gestation (after declaration of pregnancy)? Monthly EqD - 0.5mSv Entire Gestation - 5mSv
What is the annual EfD limit for occupational workers? 50mSv (5rem)
Dosimetry devices are issued to healthcare personnel when they could recieve approximately _____% of the annual occupational EfD limit in any month, or approximately _____mSv (_____mrem). 1% ; 0.04mSv ; 4mrem
Written personnel dosimetry reports include deep, _____________, and ___________ exposure records? shallow ; eye
OSL dosimeters can be worn up to ___________ to record occupational exposure. 1 year
What does the letter "M" stand for on the personnel monitoring reports? An EqD below the minimum measurable radiation quantity was recorded during that time period.
What "dose" is used to determine how much radiation a patient has received during a fluoroscopic exam? absorbed dose (D)
___________ _____________ is a radiation quantity used to express the amount of ionizing radiation someone has received. equivalent dose (EqD)
What is the formula to determine EqD? EqD = D x Wr
What is the SI unit used to express EqD? Sievert (Sv)
What is the SI unit used to express absorbed dose? gray (Gy)
The sum of energy that is absorbed per unit mass is called ____________. absorbed dose
Created by: whittenj5507
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