10/8: Radiation Protection

Question 1

What are the goals of an OMFS oral surgeon?

Answer 1

1. Reduce Radiation exposure
2. Maintain a high degree of diagnostic efficiency

Question 2

What does “ALARA” stand for?

Answer 2

As low as reasonably achievable

Question 3

What does “ALADA” stand for?

Answer 3

As low as Diagnostically acceptable

Question 4

What is mandated for the tube-head?

Answer 4

Filtration
Collimator

Question 5

This allows a selective passage of content through a specified substance

Answer 5

Filtration

Question 6

Filtration removes what?

Answer 6

Low kEV

Question 7

Filtration does what to the energy of the beam

Answer 7

Increases mean energy

Question 8

What filtration sizes are required for kV?

Answer 8

<50 kV → 0.5mm
50-70 → 1.5mm
>70 → 2.5mm

Question 9

What is the maximum diameter of collimation?

Answer 9

2.75” diameter

Question 10

What shape is recommended for a collimator?

Answer 10

Rectangular

Question 11

What is optional for the x-ray tubes?

Answer 11

Rectangular collimator
High kV
Direct DC
Increased focal length

Question 12

Area exposed is related to the

Answer 12

Maximum size of the beam

Question 13

Why do you want a high kV?

Answer 13

Lower dose → heavier unit

Question 14

Why do you want constant DC potential?

Answer 14

Constant energy, lower exposure time

Question 15

What are the benefits of increased focal length?

Answer 15

Less head volume
Reduced effective dose
Sharper image

Question 16

What practice options can you have?

Answer 16

Film
Lead thyroid collar
Film-holding device
Time-temp quality

Question 17

What kind of films are there?

Answer 17

D
E
F
Digital receptors

Question 18

What do you use for patient protection during radiographs?

Answer 18

Lead apron
Thyroid collar

Question 19

What is recent research saying about patient shielding?

Answer 19

It is useless

Question 20

Should you avoid holding the receptor?

Answer 20

Yes

Question 21

Where should you stand when taking an x-ray?

Answer 21

Behind barrier, 6 feet away, 90-135 degrees to the beam

Question 22

What should be worn by full-time operators of radiographic equipment?

Answer 22

Dosimeter badge

Question 23

The annual occupational whole body exposure should not exceed

Answer 23

50 mSv

Question 24

Nomad violates ______, unless ______

Answer 24

1. Current regulations
2. Backscatter shield is permanently mounted