Chapter 5 rad Protection Quiz

Question 1

What is the most common radiation survey instrument?

Answer 1

Geiger Muller

Question 2

What does the Geiger-Muller serves as?

Answer 2

The primary portable radiation survey instrument for area monitoring in nuclear medicine facilities

Question 3

How does the Geiger-Muller alerts the operator when radiation is present?

Answer 3

Audible sound system (an audio amplifier and speaker)

Question 4

What is the disadvantage of the Geiger-Muller?

Answer 4

In diagnostic imaging photons of widely different energies can cause the instrument to respond very differently

Question 5

What is the most common type of survey meter that incorporate an ionization chamber

Answer 5

cutie pie

Question 6

What is both a rate meter device (measures exposure rate) used for area surveys and an accurate integrating or cumulative exposure instrument

Answer 6

cutie pie

Question 7

What does the cutie pie measure?

Answer 7

x-radiation and gamma radiation and if equipped with suitable window, can also record beta radiation

Question 8

What radiation ranges does the cutie pie measure?

Answer 8

1 mR/hr to several milliroents per hour. Intergrade mode-sum exposure from as little as 1 mR to several Roentgen

Question 9

What’s the advantage of the cutie pie?

Answer 9

It is able to measure a wide range of radiation exposure within a few seconds

Question 10

What are the disadvantages of the cutie pie?

Answer 10

It s a delicate detector, large size of unit, without adequate warm up time its meter will drift and produce an inaccurate reading

Question 11

Where does a Proportional COunter serve no purpose at?

Answer 11

Diagnostic imaging

Question 12

Where is a proportional counter used?

Answer 12

Laboratory settings to detect alpha and beta radiation and small amounts of other types of lower level radioactive contamination

Question 13

Know the 3 different gas filled radiation detectors used as field instruments

Answer 13

• cutie pie (ionization chamber type)
• proportional counter
• GM detector

Question 14

How does a medical physicist perform the standard measurements required for radiographic equipment?

Answer 14

using ionization chambers connected to electrometers

Question 15

What do these measurements include?

Answer 15

x-ray output n MR/mAs, reproducibility, and linearity of output, timer accuracy, half-value layer, beam quality, and entrance exposure rates for fluoroscopy