Week 2

Question 1

Which cells have the same effect to radiation?

Answer 1

Somatic and genetic

Question 2

Are young cells or old cells more vulnerable to radiation young or old?

Answer 2

Young

Question 3

Define GRAY.

Answer 3

Quantity of energy imparted by the radiation to matter per unit of mass

Question 4

Define SIVERT.

Answer 4

Absorbed dose as modified by quality factors for live tissues.

Question 5

What is ALARA?

Answer 5

The basic safety procedures

Question 6

What are the three key items for work safety?

Answer 6

Time, distance, and shielding.

Question 7

How many millimeters of lead equivalent do gloves have ?

Answer 7

0.5mm

Question 8

What is density?

Answer 8

The degree of blackness in a film.

Question 9

What is density controlled by?

Answer 9

Exposed silver

Question 10

What is exposed silver controlled by?

Answer 10

mAS

Question 11

What is contrast?

Answer 11

The difference between tones

Question 12

What is Dmax?

Answer 12

All the silver halide grains are developed.

Question 13

What are some reasons for maximum blackness?

Answer 13

Not enough mAs, not enough kVp, and compromised developer.

Question 14

What does mAs control?

Answer 14

Density

Question 15

What is contrast controlled by?

Answer 15

kVps

Question 16

What happens with high contrast?

Answer 16

A large difference between densities.

Question 17

What happens with low contrast?

Answer 17

Small difference between densities.

Question 18

What is a short scale of contrast?

Answer 18

Big difference between densities.

Question 19

What is short scale contrast usually used for?

Answer 19

Bones and soft tissue?

Question 20

How is short scale contrast achieved?

Answer 20

By using a lower kVp

Question 21

What is a large scale of contrast?

Answer 21

Slight difference between densities.

Question 22

How is large scale contrast achieved?

Answer 22

Using a higher kVp

Question 23

Where is large scale of contrast commonly used?

Answer 23

Abdomen and thorax.

Question 24

Where do you high a lower contrast long scale or short scale?

Answer 24

Longer scale

Question 25

What is noise on a film?

Answer 25

Grainless textured appearance

Question 26

What does grain relate to?

Answer 26

The size of the silver clumps