RADT BIOLOGY TEST #1 SELF TEST
What is any kind of radiation capable of removing an orbital electron from an atom with
which it interacts? - ANS-Ionizing radiation
Ionizing radiation has what two principle catagories? - ANS-1. Particulate
2. EMR
What is the charge, range, and origin of alpha? - ANS-+2
5 cm
Nucleus of radioactive element
What particle is composed of 2 protons and 2 neutrons so is basically the nucleus of ...
What? - ANS-Alpha
Helium atom
What is the LET, LET value, and movement of alpha? - ANS-High
100 KeV/mm
Slow
What is the charge, the range, and the origin of beta? - ANS--1
0-10 m in air 0-2 in soft
Nucleus
What is the LET, LET value, and movement of beta? - ANS-Low
0.3 KeV/mm
Fast
The beta particle is a very high energy what? - ANS-Electron
What is the charge, range, origin, and penetrating ability of gamma? - ANS-0
Unlimited
Nucleus
Highest
What does it take to stop an alpha particle? Beta? - ANS-Sheet of paper
Al
What does it take to stop gamma/x rays? - ANS-Pb concrete
, T or F
The older the tissue and organs, the higher the radiosensitivity - ANS-False
T or F
Precursor cells are more radiosensitive the mature cells - ANS-True
T or F
As metabolic activity decreases, radiosensitivity decreases - ANS-True
Fast neutrons and protons have high or low LET? - ANS-High
What type of radiation is considered the most ionizing? - ANS-Alpha
What type of radiation is closer the most penetrating? - ANS-Gamma
What type of radiation has the highest RBE? - ANS-Alpha
What is defined as the quantity of energy deposit per unit length of a charge particle
track in matter? - ANS-LET
X-rays have an RBE of what and an LET of what? - ANS-Less than 1
3 KeV/mm
Two methods of lengthening the time of dose delivery are...? - ANS-Fractionation and
protraction
Radiation dose that is delivered in equal portions is called what? - ANS-Fractionated
Radiation does delivered continuously is called what? - ANS-Protraction
If radiation is lengthened a higher or lower dose will be required to produce the same
effect? - ANS-Higher
The radiation effect will be more or less as the radiation time lengthens? - ANS-More
The dose delivery method commonly used in radiation therapy is what? -
ANS-Fractionated
Tissue what and what occur between fractionated doses? - ANS-Repair and recovery
What is any kind of radiation capable of removing an orbital electron from an atom with
which it interacts? - ANS-Ionizing radiation
Ionizing radiation has what two principle catagories? - ANS-1. Particulate
2. EMR
What is the charge, range, and origin of alpha? - ANS-+2
5 cm
Nucleus of radioactive element
What particle is composed of 2 protons and 2 neutrons so is basically the nucleus of ...
What? - ANS-Alpha
Helium atom
What is the LET, LET value, and movement of alpha? - ANS-High
100 KeV/mm
Slow
What is the charge, the range, and the origin of beta? - ANS--1
0-10 m in air 0-2 in soft
Nucleus
What is the LET, LET value, and movement of beta? - ANS-Low
0.3 KeV/mm
Fast
The beta particle is a very high energy what? - ANS-Electron
What is the charge, range, origin, and penetrating ability of gamma? - ANS-0
Unlimited
Nucleus
Highest
What does it take to stop an alpha particle? Beta? - ANS-Sheet of paper
Al
What does it take to stop gamma/x rays? - ANS-Pb concrete
, T or F
The older the tissue and organs, the higher the radiosensitivity - ANS-False
T or F
Precursor cells are more radiosensitive the mature cells - ANS-True
T or F
As metabolic activity decreases, radiosensitivity decreases - ANS-True
Fast neutrons and protons have high or low LET? - ANS-High
What type of radiation is considered the most ionizing? - ANS-Alpha
What type of radiation is closer the most penetrating? - ANS-Gamma
What type of radiation has the highest RBE? - ANS-Alpha
What is defined as the quantity of energy deposit per unit length of a charge particle
track in matter? - ANS-LET
X-rays have an RBE of what and an LET of what? - ANS-Less than 1
3 KeV/mm
Two methods of lengthening the time of dose delivery are...? - ANS-Fractionation and
protraction
Radiation dose that is delivered in equal portions is called what? - ANS-Fractionated
Radiation does delivered continuously is called what? - ANS-Protraction
If radiation is lengthened a higher or lower dose will be required to produce the same
effect? - ANS-Higher
The radiation effect will be more or less as the radiation time lengthens? - ANS-More
The dose delivery method commonly used in radiation therapy is what? -
ANS-Fractionated
Tissue what and what occur between fractionated doses? - ANS-Repair and recovery
