2nd Edition Johnston Test Bank

Essentials of Radiographic Physics and Imaging 2nd Edition Johnston Test Bank

Chapter 01: Introduction to the Imaging Sciences

Johnston: Essentials of Radiographic Physics and Imaging, 2nd Edition

MULTIPLE CHOICE

• X-rays were discovered
• November 8, 1805
• November 8, 1875
• November 8, 1895
• November 8, 1985

ANS: C

X-rays were discovered November 8, 1895.

REF: 1 OBJ: 1

• Barium platinocyanide was the material in Dr. Roentgen’s laboratory that
• covered the cathode ray tube
• fluoresced when the cathode ray tube was energized
• was used to produce the radiograph of Bertha Roentgen’s hand
• protected the people in the room from the x-rays

ANS: B

A piece of cardboard covered with barium platinocyanide fluoresced when the tube was energized, leading to further investigation.

REF: 1-2 OBJ: 1

• Wilhelm Roentgen’s lab was located in
• Wurzburg
• Zurich
• Paris
• Boston

ANS: A

Dr. Roentgen’s lab was located at the University of Wurzburg in Wurzburg, Germany.

REF: 1 OBJ: 1

• The first radiograph produced by Dr. Roentgen was of
• his own hand
• his daughter’s hand
• his son’s hand
• his wife’s hand

ANS: D

The first radiograph was taken December 22, 1895, of his wife, Bertha’s, hand.

REF: 2 OBJ: 1

• Exposure times for very early radiographs ranged from 1 / 4

• 1 second to 5 seconds
• 1 minute to 15 minutes
• 20 minutes to 2 hours
• 2 hours to 5 hours

ANS: C

Exposure times for early radiographs took from 20 minutes to 2 hours to produce an image.

REF: 3 OBJ: 1

• Acute radiodermatitis was
• the radiation burn resulting from excessive exposure to x-rays
• common among early patients and operators of x-ray equipment
• a delayed reaction to excessive x-ray exposure
• all of the above

ANS: D

Early on, the excessive radiation exposure to many operators and patients resulted in radiation burns, a delayed response to the exposure.

REF: 3 OBJ: 1

• Who brought attention to the dangers of x-rays?
• Wilhelm Roentgen.
• Bertha Roentgen.
• Crookes.
• Thomas Edison.

ANS: D

Thomas Edison, the famous American inventor, suffered a radiation burn and brought attention to the dangers of x-rays.

REF: 3 OBJ: 1

• An example of how x-rays were used for entertainment or business gain in a dangerous

manner was the

• fluoroscopic shoe fitter
• x-ray stove polish
• x-ray headache tablets
• x-ray golf balls

ANS: A

Although the stove polish, headache tablets, and golf balls used “x-ray” in their names, the shoe fitter actually exposed shoppers to radiation.

REF: 4 OBJ: 1

• Mass, length, and time are considered
• fundamental quantities
• derived quantities
• radiologic quantities
• none of the above 2 / 4

ANS: A

Mass, length, and time are the most basic or fundamental quantities.

REF: 5 OBJ: 2

• Velocity, acceleration, and work are
• fundamental quantities
• derived quantities
• radiologic quantities
• none of the above

ANS: B

Along with force, momentum and power, velocity, acceleration, and work are derived from the fundamental quantities.

REF: 5 OBJ: 2

• Exposure, dose, and dose equivalent are
• fundamental quantities
• derived quantities
• radiologic quantities
• none of the above

ANS: C

Along with the measure of radioactivity, dose, dose equivalent, and exposure are radiologic quantities.

REF: 5 OBJ: 2

• The metric system is also known as the
• British system
• System International (SI)
• System of Units (SU)
• French system

ANS: B

The metric system is also known as the System International (SI).

REF: 5 OBJ: 2

• In the SI system the unit of measure for mass is
• pound
• gram
• kilogram
• ton

ANS: C

The SI system uses kilogram to quantify mass.

REF: 5 OBJ: 2

• In the SI system the unit of measure for length is 3 / 4

The British system uses pound to quantify mass.

• meter
• kilometer
• foot
• mile

ANS: A

The SI system uses meter to quantify length.

REF: 5 OBJ: 2

• In the SI system the unit of measure for time is
• minute
• second
• hour
• day

ANS: B

The SI system uses second to quantify time.

REF: 5 OBJ: 2

• In the British system the unit of measure for mass is
• pound
• gram
• kilogram
• ton

ANS: A

REF: 5 OBJ: 2

• In the British system the unit of measure for length is
• meter
• kilometer
• foot
• mile

ANS: C

The British system uses foot to quantify length.

REF: 5 OBJ: 2

• In the British system the unit of measure for time is
• minute
• second
• hour
• day

ANS: B

The British system uses second to quantify time.

REF: 5 OBJ: 2

• / 4