Ch4-5 Flashcards
Units used from 1900-1930 were called ?
Skin erythema dose
A measure of the amount of radiant energy that has been thrust into a patients body surface
DAP
The amount of energy transferred on average by incident radiation to an object per unit length of track
LET
The product
DxWrxWt
EfD
Effective dose
Product of
D x Wr
Equivalent Dose
EqD
Blood disorder resulting from bone marrow failure after exposure
Aplastic anemia
Short wavelength, high energy, electromagnetic wave emitted by the nuclei
Gamma radiation
Radiation dosimetery quantity that was defined by the NRC to monitor n control human exposure. To keep track for the course of the year
TEDE
The SI unit for radiation exposure or air Kerma ?
C/kg
A dimensionless factor( or multiplier) that places risks associated with biological effects on a common scale
Wr
Who invented the fluoroscope?
Thomas Edison
The ampre is the SI unit of:
Electric current
The whole body TEDE regulatory limit for exposed personnel is________ and__________ for the general public
.05 Sv
.001 Sv
Which radiation quantity is used to describe of a population or group from low doses of different ionizing radiation ?
ColEfD
Which quantity provides a measure of overall risk of exposure to humans of ionizing radiation ?
Effective dose
EfD
Fluoroscopic entrance exposure is measured in ?
Mgy/min
In radiation therapy the unit used for recording Dose is ?
cGy
In 1937, _________ became the international unit of measure for x radiation and gamma radiation
Roentgen
In 1980, the ________ adopted the SI unit system (aka metric system) for use of ionizing radiation
ICRU
The instrument used to calibrate air Kerma is a standard or free air _________
Ionizing chamber
The 1st to die of radiation induced cancer in 1904?
Clarence dally
What unit replaced the tolerance dose for radiation protection purposes in the 1950s
MPD
Maximum permissible dose
The importance of The most important theory; the Bragg-gray theory by Louis Harold gray?
Ionization produced in a small cavity w/in irradiated medium
Dap can be calculated to get what in units?
mGr-cm2
The unit for ColEfD is
Person-sievert
The ionizing chamber -type survey meter is also known as?
Cutie pie
The personal dosimeter that uses a laser light during the read out is called?
The OSL
Also contain al2O3 aluminum oxide to detect radiation
The TLD Dosimeter uses what physical properties to calculate ionizing radiation ?
LiF
Lithium fluoride
The OSL dosimeter detects a reading as low as _____
Of X-rays and gamma rays in the range of 5keV to 40MeV
1mrem
An extremity dosimeter or TLD ring are used to approximate equivalent dose of _________
The hands!
What instrument is used to locate lost radioactive or low detective radioactive contamination ?
A GM Meter
What is the annual EfD limit ??
50mSv (5Rem)
Penetrating rays of the skin developed reddening of the skin called?
Radiodermatitis
MPD unit was initially called ??
Rem
The MPD removes the notion of —
“Tolerance dose”
