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ARRT Test Prep, LIMITED X-RAY CORE – Questions and answers
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ARRT Test Prep, LIMITED X-RAY CORE –Questions and answers
Main property of x-radiation that makes it potentially hazardous is its ability to? -
ANSWERS✔✔ Ionize
Describe the damage potential of ionization? - ANSWERS✔✔ Chain reaction in the human
body that may eventually cause biologic damage. X-rays are from the Electric Magnetic
Spectrum or radiation energy and is considered harmful in high energy ranges.
What is the most likely potential hazard working with diagnostic radiology? -
ANSWERS✔✔ Carcinogenesis - Stochastic/Non-Threshold Effect
.1 Rem = ? Seivert - ANSWERS✔✔ 1 Sievert
0.1 Gray = ? Rad - ANSWERS✔✔ 10 Rad
1 Gray = ? Rad - ANSWERS✔✔ 100 Rad
What is Aplastic Anemia? When dose it occur? - ANSWERS✔✔ All types of blood cells: Red
& White
25 Rads
A decrease in blood count is the earliest response seen to dose radiation. It can occur at
dosease as low as? - ANSWERS✔✔ 25 Rads or .25 Gray
What is Cataractogenesis? - ANSWERS✔✔ Process of Cataract Formation
,Cataractogenesis occurs after acute or chronic exposures of how many Rads? -
ANSWERS✔✔ 200 Rads, 2 Gray
Skin Eyrythemia (Skin Redning) occurs above? - ANSWERS✔✔ Above 200 Rad, 2 Gray
Temporary Sterility occurs in the adult male at acute doses of how many Rads? -
ANSWERS✔✔ 250 Rads, 2.5 Gray
Pregnant radiographer should? (3) - ANSWERS✔✔ Always practice TDS
Has legal right for re-assignment of duty
Never confuse collar badge with waist badge
Monthly dosimetry reports is based on what? - ANSWERS✔✔ OCCUPATIONAL exposures
only.
Monthly Dosimeter reports does NOT include? - ANSWERS✔✔ Natural or Background
Radiation
What is the recommended monthly dose-equivalent limit for the fetus in the third trimester?
- ANSWERS✔✔ 0.5 mSv
.05 Rem
NRCP 116
Radiation workers cumulative dose-equivalent limit is determined by? - ANSWERS✔✔ Age
x 10 mSv
Age x 1 Rem
NCRP 110
,What is the Occupational radiation dose equivalent limit for stochastic effects to the whole
body? - ANSWERS✔✔ 50 mSv (5 Rem)
When using a C-Arm mobile unit, the intensification tower should be? - ANSWERS✔✔ As
close as possible to the patient to reduce patient dose and unnecessary magnification.
Radiation exposure in air = ? - ANSWERS✔✔ Roentgens - Ionization in air dose
measurement.
Electrical current being generated by a charge created in air thru ionization by x/gamma
radiation is called a? - ANSWERS✔✔ Ion Chamber
The quantity of radiation exposure measured by an ionization chamber would be? -
ANSWERS✔✔ Coulomb/Kilogram
The C/Kg or R is usually the unit measured in? - ANSWERS✔✔ Air dose
List the 3 measurements that are more appropriate for measuring absorbed doses for
radiation or occupational dose? - ANSWERS✔✔ Gray (1) - Rad (100)
Seivert (1) - Rem (100)
Curie - Bacquerel
What type of changes are used to measure occupational dose? (3) - ANSWERS✔✔
Scintillation
Biological
Chemical
Example of personnel monitor that measures radiation thru chemical change reaction? -
ANSWERS✔✔ Film Badge - Operate off Gurney-Mott theory.
, Explain the Gurney-Mott Theory...? - ANSWERS✔✔ Describes how an x-ray photon changes
silver halide into atomic silver in the film emulsion--a definite chemical change.
How long can a film badge be worn? - ANSWERS✔✔ No more than a month
Why shouldn't film badges be worn greater than a month? - ANSWERS✔✔ Extreme
sensitivity to environmental conditions.
TLD's operate thru? - ANSWERS✔✔ Luminescence (NO chemical rx's occur)
Pocket dosimeters can only work for? - ANSWERS✔✔ 1 day and must be reset everyday.
Upper reading limit of 200-300 rads
Pocket dosimeter uses? - ANSWERS✔✔ Electrical current as a measurement of charge.
The type of personnel monitor that could be worn the longest is the? - ANSWERS✔✔ OSD
Optical stimulated detector can be worn up to? - ANSWERS✔✔ 3 months and be sensitive
to 2 mR
Leakage radiation should NOT exceed how much mR at 1 meter from the scource? -
ANSWERS✔✔ 100 mR per hr
0.1 Rad per hr
NCRP 102
According to Bushong, tabletop intensity should NOT exceed what? - ANSWERS✔✔ 2.1 mR
per min for each mA operating at 80 kVp.
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