Outcome 1

Question 1

What are the three types of radiation exposure?

Answer 1

1. Background
2. Medical
3. Occupational

Question 2

What are the two sources of background radiation?

Answer 2

1. Natural
2. Artificial

Question 3

What are examples of natural radiation?

Answer 3

• atmospheric/cosmic
• terrestrial/soil
• ingestion/internally
• inhalation

Question 4

What are some examples of elements found in soil?

Answer 4

Uranium-238 and Thoron and other daughters

Question 5

What are some examples of elements that are found internally?

Answer 5

P-40: in red meats
Ra-226 in water
C-14 co2

Question 6

What is the largest source of natural radiation?

Answer 6

Radon Rn-222 and Thoron Rn-220

Question 7

What are examples of artificial radiation?

Answer 7

• Nuclear fallout
• industrial sources
• medical

Question 8

What’s the largest source of man made radiation?

Answer 8

Medical treatments/equipments

Question 9

Are medical radiation exposure doses regulated by CNSC?

Answer 9

No.

Question 10

What is DOSE OPTIMIZATION?

Answer 10

Correct dosage based on the condition of the patients (eg. pregnant)

Question 11

What is ALARA?

Answer 11

As low as reasonably achievable

Question 12

What is the rationale used for use of radiation for diagnostic procedures?

Answer 12

Benefit vs. Risk

Question 13

Treatment can be palliative or radical. What is the difference?

Answer 13

Palliative is for comfort/to ease patients’ suffering

Radical is to treat/to attempt to cure of disease

Question 14

What type of EMR is used for diagnostics? Therapeutic?

Answer 14

Diagnostics = x-rays and gamma rays
Therapy = alpha and beta

Question 15

What is occupational radiation exposure mean?

Answer 15

It is the exposure due to the nature of one’s job

Question 16

Does CNSC regulate occupational rad exposure?

Answer 16

Yes. By requiring licensing and regulating the employees

Question 17

What is NEW?

Answer 17

Nuclear energy worker

Question 18

What is the effective dose limits (EDL) for a NEW?

Answer 18

50 mSv/yr or 100 mSv/5 yrs

Question 19

EDL does include medical rad exposure and background rad exposure. T/F

Answer 19

False

Question 20

What is the EDL for the public?

Answer 20

1 mSv/yr

Question 21

What are some benefits of NM?

Answer 21

• able to view how there body is functioning/early discovery/diagnosis
• personalization of treatments
• used to kill cancer cells with minimal tissue damage

Question 22

What is the Equivalent dose limits for LENS OF EYES?

Answer 22

NEW: 50 mSv/yr
Public: 15 mSv/yr

Question 23

What is the equivalent dose limits for SKIN?

Answer 23

NEW: 500 mSv/yr
Public: 50 mSv/yr

Question 24

What is the equivalent dose limit for HANDS/FEET?

Answer 24

NEW: 500 mSv/yr
Public: 50 mSv/yr

Question 25

What is the ambient dose limit?

Answer 25

NEW: 25 uSv/h
Public: 2.5 mSv/h

Question 26

What is teletherapy?

Answer 26

Multiple beams of radiation being administered by a machine that is positioned some distance away from the patient.

Question 27

What is instillation therapy?

Answer 27

Injection of radioactive source into a body cavity.
Allows for localization in a membrane

Question 28

What is brachytherapy?

Answer 28

Placing radioactive sealed sources inside or next to the area that requires treatment