RADT 1010 MIDTERM EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
what |does |ALARA |stand |for
As |Low |As |Reasonably |Achievable
List |the |cardinal |rules |of |radiation |exposure
1. |Time
2. |Distance
3. |Shielding
The |relationship |between |the |time |(beam |on |time) |and |exposure |is:
Directly |proportional
"________ |dose" |is |the |exposure |to |the |tech
occupational
the |greatest |source |of |occupational |exposure |to |the |tech |comes |from |______ |radiation |
coming |from |the |_________
back |scatter, |patient
which |of |the |following |positions |will |provide |the |tech |with |the |LEAST |amount |of |backscatter?
a. |90 |degrees |to |central |ray |at |the |patient
b. |70 |degrees |to |central |ray |at |the |patient
c. |65 |degrees |to |central |ray |at |the |patient
d. |45 |degrees |to |central |ray |at |the |patient
a. |90 |degrees |to |central |ray |at |the |patient
Annual |whole |body |dose
50 |mSv
Cumulative |lifetime |dose
Age |in |years |x |10 |mSv
,radiology |student |UNDER |18 |years |old
1 |mSv
Pregnant |worker |(to |fetus) |for |gestational |period
5 |mSv
pregnant |worker |(to |fetus) |for |any |given |month
.5 |mSv
What |is |the |cumulative |lifetime |occupational |dose |for |a |20 |year |old |radiation |worker
20 |x |10 |mSv |= |200mSv
_________ |is |the |physical |space |from |the |source |of |exposure
distance
the |relationship |of |the |physical |space |from |the |source |of |exposure |and |the |amount |of |
exposure |is:
inversely |proportional
what |law |describes |the |relationship |of |the |physical |space |from |the |source |and |the |amount |of |
exposure?
The |inverse |square |law
inverse |square |law |formula
I1/I2 |= |D2^2/D1^2
____ |is |used |to |intercept/absorb |unwanted |radiation |before |it |hits |the |tech |or |the |patient
shielding
how |much |shielding |can |reduce |exposure |to |10% |as |compared |to |using |no |shielding?
.5mmm |pb
how |much |shielding |can |reduce |exposure |to |90% |as |compared |to |using |no |shielding?
.5mm |pb
What |are |the |two |things |you |can |do |to |decrease |fetal |exposure?
- |take |the |least |amount |of |pictures
-double |shield
, ___________/__________ |effects |of |overexposure |to |radiation |manifest |within |1 |year |of |a |
whole |body |exposure |to |1Sv
Acute/ |early
___________/__________ |effects |of |overexposure |to |radiation |manifest |after |a |latent |period |
of |1 |year |or |longer
long |term/ |late
_______ |radiation |effects |manifest |in |offspring |of |the |one |who |received |the |overexposure
genetic
_________ |is |radiation |damage |to |DNA |of |the |germ |cell |which |may |result |in |cell |mutation
Aberration
________ |effect |may |skip |generations |until |descendant |mates |with |someone |carrying |the |
same |defective |gene
Recessive |genetic
________ |effects |manifest |in |the |person |receiving |the |over |exposure |(patient |or |tech)
Somatic
Acute |or |large |doses |of |radiation |may |cause |erythema |also |known |as |__________ |and |
epilation |________
skin |redness |; |hair |loss
long |term |multiple |small |doses |of |radiation |can |build |up |and |cause |_________ |(opacity |to |the |
lens |of |the |eye) |and |_________ |(cancer
Cataracts |; |carcinogenisis
The |theory |of |Burgonie |and |Tribondaux |states |that |cells |that |are |young |_________ |dividing |
and |are |_________ |in |structure |are |more |radiosensitive/less |radioresistant
Rapidly |; |simple
How |does |the |oxygenation |of |cells |affect |their |sensitivity |to |radiation?
cells |with |more |oxygen |are |more |radiosensitive
oxygenation |of |cells |increases |their |radiosensitivity |by
2.5 |to |3.0 |times
COMPLETE SOLUTIONS
what |does |ALARA |stand |for
As |Low |As |Reasonably |Achievable
List |the |cardinal |rules |of |radiation |exposure
1. |Time
2. |Distance
3. |Shielding
The |relationship |between |the |time |(beam |on |time) |and |exposure |is:
Directly |proportional
"________ |dose" |is |the |exposure |to |the |tech
occupational
the |greatest |source |of |occupational |exposure |to |the |tech |comes |from |______ |radiation |
coming |from |the |_________
back |scatter, |patient
which |of |the |following |positions |will |provide |the |tech |with |the |LEAST |amount |of |backscatter?
a. |90 |degrees |to |central |ray |at |the |patient
b. |70 |degrees |to |central |ray |at |the |patient
c. |65 |degrees |to |central |ray |at |the |patient
d. |45 |degrees |to |central |ray |at |the |patient
a. |90 |degrees |to |central |ray |at |the |patient
Annual |whole |body |dose
50 |mSv
Cumulative |lifetime |dose
Age |in |years |x |10 |mSv
,radiology |student |UNDER |18 |years |old
1 |mSv
Pregnant |worker |(to |fetus) |for |gestational |period
5 |mSv
pregnant |worker |(to |fetus) |for |any |given |month
.5 |mSv
What |is |the |cumulative |lifetime |occupational |dose |for |a |20 |year |old |radiation |worker
20 |x |10 |mSv |= |200mSv
_________ |is |the |physical |space |from |the |source |of |exposure
distance
the |relationship |of |the |physical |space |from |the |source |of |exposure |and |the |amount |of |
exposure |is:
inversely |proportional
what |law |describes |the |relationship |of |the |physical |space |from |the |source |and |the |amount |of |
exposure?
The |inverse |square |law
inverse |square |law |formula
I1/I2 |= |D2^2/D1^2
____ |is |used |to |intercept/absorb |unwanted |radiation |before |it |hits |the |tech |or |the |patient
shielding
how |much |shielding |can |reduce |exposure |to |10% |as |compared |to |using |no |shielding?
.5mmm |pb
how |much |shielding |can |reduce |exposure |to |90% |as |compared |to |using |no |shielding?
.5mm |pb
What |are |the |two |things |you |can |do |to |decrease |fetal |exposure?
- |take |the |least |amount |of |pictures
-double |shield
, ___________/__________ |effects |of |overexposure |to |radiation |manifest |within |1 |year |of |a |
whole |body |exposure |to |1Sv
Acute/ |early
___________/__________ |effects |of |overexposure |to |radiation |manifest |after |a |latent |period |
of |1 |year |or |longer
long |term/ |late
_______ |radiation |effects |manifest |in |offspring |of |the |one |who |received |the |overexposure
genetic
_________ |is |radiation |damage |to |DNA |of |the |germ |cell |which |may |result |in |cell |mutation
Aberration
________ |effect |may |skip |generations |until |descendant |mates |with |someone |carrying |the |
same |defective |gene
Recessive |genetic
________ |effects |manifest |in |the |person |receiving |the |over |exposure |(patient |or |tech)
Somatic
Acute |or |large |doses |of |radiation |may |cause |erythema |also |known |as |__________ |and |
epilation |________
skin |redness |; |hair |loss
long |term |multiple |small |doses |of |radiation |can |build |up |and |cause |_________ |(opacity |to |the |
lens |of |the |eye) |and |_________ |(cancer
Cataracts |; |carcinogenisis
The |theory |of |Burgonie |and |Tribondaux |states |that |cells |that |are |young |_________ |dividing |
and |are |_________ |in |structure |are |more |radiosensitive/less |radioresistant
Rapidly |; |simple
How |does |the |oxygenation |of |cells |affect |their |sensitivity |to |radiation?
cells |with |more |oxygen |are |more |radiosensitive
oxygenation |of |cells |increases |their |radiosensitivity |by
2.5 |to |3.0 |times
