lesson 1

Question 1

• they design the equipment that emits radiation
• they always check for radiation
• Developed administrative protocols (rules)

Answer 1

Health physicists or radiation scientist

Question 2

Linear Non threshold
dose response relationship model for
radiation protection

Answer 2

Practice ALARA

Question 3

The more you give
radiation to the patient the more higher the
side effects to the patient

Answer 3

Linear threshold

Question 4

benefits over the risk

Answer 4

Justification

Question 5

what are the limitation

Answer 5

time/distance/shielding

Question 6

Three cardinal principles of radiation
protection

Answer 6

• develop for nuclear activities
• useful application in diagnostic radiology
• by observing the ff. Radiation exposure can
  be minimized

Question 7

keep as short as possible

Answer 7

Time

Question 8

maintain a large BLANK b/n
the source of radiation and the exposed
person

Answer 8

Distance

Question 9

for the area that is no need for
exposure for the other body parts

Answer 9

Shielding

Question 10

Minimize time benefits

Answer 10

• to reduce motion blur
• to reduce patient and personnel exposure

Question 11

Equation exposure =

Answer 11

exposure rate X Exposure time

Question 12

sequencing on off rather than continuous
on during examination ( repeated up and
down motion - high-quality examination
and reduce patient exposure

Answer 12

Fluoroscopic foot switch/ dead man
switch

Question 13

<5 mins

Answer 13

Fluoro procedure-

Question 14

> 5mins

Answer 14

Interventional radiology procedure

Question 15

Best method to reduce radiation

Answer 15

distance between source of rad and the
person increase = decrease radiation
exposure

Question 16

x ray tube target

Answer 16

Point source-

Question 17

like scatter radiation na
galing sa patient

Answer 17

Extended source

Question 18

FFD

Answer 18

other term sa SID focal point to film
distance

Question 19

Inverse square law

Answer 19

Distance increase dose will decrease

Question 20

Formula for inverse square law

Answer 20

intensity 1/ intensity 2 =
distance 2^2/ Distance 1^2

Question 21

lines that represent positions of equal
radiation exposure in the fluoroscopy room

Answer 21

Iso exposure lines

Question 22

Used to estimate the amount that a
protective barrier reduces radiation intensity

Answer 22

1TVL= 3.3 HVL constant value

Question 23

is the thickness of absorbing material to
reduce the radiation intensity to half of its
original value

Answer 23

Half value layer- filtration

Question 24

thickness of material that will reduce the radiation intensity to one-tenth of its original
value

Answer 24

Tenth- value layer

Question 25

thickness of a protective apron

Answer 25

0.5mm Pb thickness

Question 26

Is the maximum dose of radiation in
light present knowledge produces no
significant radiation effects.

Answer 26

Maximum permissible dose (MPD)

Question 27

no somatic
or genetic responses should occur

Answer 27

Radiation dose below MPD

Question 28

risk is small but not zero

Answer 28

Doses at level of MPD

Question 29

• considered the level of exposure
  acceptable as an occupational hazard
• all unnecessary radiation exposure should
  be avoided

Answer 29

linear non threshold

Question 30

Students under 18 yrs old MPD

Answer 30

0.1rem(100mrem/yr)(1mSv/yr)

Question 31

Non-occupational exposure MPD

Answer 31

0.5rem (500mrem)(5mSv)

Question 32

Pregnant RT MPD

Answer 32

• Not exceed 0.5rem (500mrem)(5mSv) yearly
• If per month:50mrem(0.5mSv)

Question 33

0.5rem (500mrem)
(5msv)

Answer 33

Fetus MPD

Question 34

Radiation dose units

Answer 34

• Gyt
• rad
• energy
  absorbed of patient

Question 35

Radiation exposure units

Answer 35

• Gya
• roentengen
• intensity in air

Question 36

Public and occupational exposure units

Answer 36

• rem
• radiation (roentgen) equivalent
  man