NBDHE - RADIOLOGY!!!

Question 1

With all other variables remaining constant, an increase in kilovoltage will:

Accepted Answer

Increase density/decrease contrast

Question 2

The conversion of kinetic energy into x-ray energy by sudden stopping of an electron is called:

Accepted Answer

General (bremsstrahlung) radiation

Question 3

Film speed is dependent on the:

Accepted Answer

Size and # of silver halide crystals

Question 4

What is the annual effective dose of rad from all sources to any member of the US population?

Accepted Answer

6.2 mSv

Question 5

To maintain infection control, after use a digital sensor should be:

Accepted Answer

Wiped with an EPA-approved disinfectant

Question 6

Rad-induced biological changes in future generations from excessive exposure to repro cells:

Accepted Answer

Genetic effect

Question 7

Best rationale for taking vertical bitewings:

Accepted Answer

See more alveolar bone

Question 8

Latent-image-containing silver bromide crystals are converted to black metallic silver by:

Accepted Answer

Hydroquinone

Question 9

Whole body MAX permissible dose for occupationally exposed individual:

Accepted Answer

50 mSv

Question 10

Which is NOT an interaction x-rays with matter?

Accepted Answer

Photon may be converted to a positive charge

Question 11

Principle to keep exposure low, because any exposure may cause damage is called:

Accepted Answer

ALARA concept

Question 12

Which ONE is true about bisecting technique?

Accepted Answer

More client comfort

Question 13

Which ONE is NOT required for the controlled production of x-radiation?

Accepted Answer

Radioactive material

Question 14

How often should a caries free, low risk adult recall patient have BWX?

Accepted Answer

Every 24 - 36 months

Question 15

What is the duration of an impulse setting of 20?

Accepted Answer

1/3 second

Question 16

Which of the following is NOT a characteristic of x-radiation?

Accepted Answer

Made up of positively charged protons

Question 17

Whole body radiation induced bio damage is NOT influenced by:

Accepted Answer

Type of electrical current

Question 18

Coin tests monitor safelight conditions. If image forms on film, safelight is effective.

Accepted Answer

First true/second false

Question 19

Which of these constitutes the greatest % of OVERALL radiation exposure to US population?

Accepted Answer

Radon gas

Question 20

Process by which x-ray energy removes an electron from an atom to yield an ion pair is called:

Accepted Answer

Ionization

Question 21

Which is FALSE regarding digital radiography?

Accepted Answer

Requires film based units to be digitized to be compatible

Question 22

The purpose of lead foil in the film packet it to:

Accepted Answer

Absorb back scatter/reduce film fogging

Question 23

Which best describes how x-rays are produced in the tubehead?

Accepted Answer

High-speed electrons collide with target material electrons

Question 24

Horseshoe shaped zone of sharpness of greatest image detail in panoramic image:

Accepted Answer

Focal trough

Question 25

Which is NOT necessary to document in the client's record when providing radiographic services?

Accepted Answer

X-ray unit used for exposures

Question 26

Theory of radiation damage that explains free radicals combining to form toxins like H2O2.

Accepted Answer

Indirect

Question 27

Tissue damaged by rad that cannot repair and remains weak, esp with repeated exposures is:

Accepted Answer

Cumulative effect

Question 28

At a distance of 2', the intensity is 16 C/kg. What would the intensity be at a distance of 4'?

Accepted Answer

4 C/kg

Question 29

When increased, which would best increase the number of electrons flowing through the current?

Accepted Answer

Milliamperage

Question 30

A direct digital imaging system does NOT need which of the following to produce an image?

Accepted Answer

Scanner

NBDHE - RADIOLOGY!!!

Questions 30

NBDHE - RADIOLOGY!!!

Questions 30