1.1 Multiple Choice Questions

1 Copyright © 2018 Pearson Education, Inc.Essentials of Dental Radiography, 10e (Thomson/Johnson)

Chapter 1 Dental Radiography: Historical Perspective and Future Trends

1.1 Multiple Choice Questions 1) Who was awarded the first Nobel Prize for physics in 1901, for his experimental work with radiation?

• C. E. Kells
• O. Walkhoff
• W. D. Coolidge
• W. C. Roentgen

Answer: D

Explanation: A) Wilhelm Conrad Roentgen discovered the x-ray on November 8, 1895, when he noted that a fluorescent screen near a Crookes vacuum tube began to glow when an electric current was passed through the tube.

• Wilhelm Conrad Roentgen discovered the x-ray on November 8, 1895, when he noted that a

fluorescent screen near a Crookes vacuum tube began to glow when an electric current was passed through the tube.

• Wilhelm Conrad Roentgen discovered the x-ray on November 8, 1895, when he noted that a

fluorescent screen near a Crookes vacuum tube began to glow when an electric current was passed through the tube.

• Wilhelm Conrad Roentgen discovered the x-ray on November 8, 1895, when he noted that a

fluorescent screen near a Crookes vacuum tube began to glow when an electric current was passed through the tube.2) Who is credited with introducing the bitewing radiograph?

• F. W. McCormack
• H. R. Raper
• G. M. Fitzgerald
• C. E. Kells

Answer: B

Explanation: A) Howard Riley Raper wrote the first dental radiology textbook, Elementary and Dental Radiology, and introduced bitewing radiographs in 1925.

• Howard Riley Raper wrote the first dental radiology textbook, Elementary and Dental

Radiology, and introduced bitewing radiographs in 1925.

• Howard Riley Raper wrote the first dental radiology textbook, Elementary and Dental

Radiology, and introduced bitewing radiographs in 1925.

• Howard Riley Raper wrote the first dental radiology textbook, Elementary and Dental

Radiology, and introduced bitewing radiographs in 1925.Essentials of Dental Radiography for Dental Assistants and Hygienists 10e Evelyn Thomson, Orlen Johnson (Test Bank All Chapters, 100% Original Verified, A+ Grade) 1 / 4

2 Copyright © 2018 Pearson Education, Inc.3) Who developed the hot cathode ray tube?

• W. D. Coolidge
• A. Cieszynski
• H. R. Raper
• O. Walkhoff

Answer: A

Explanation: A) William David Coolidge developed the shockproof hot cathode tube while working for General Electric Company in 1913.

• William David Coolidge developed the shockproof hot cathode tube while working for

General Electric Company in 1913.

• William David Coolidge developed the shockproof hot cathode tube while working for

General Electric Company in 1913.

• William David Coolidge developed the shockproof hot cathode tube while working for

General Electric Company in 1913.

4) Who developed the first digital imaging system?

• W. D. Coolidge
• F. Mouyen
• H. R. Raper
• O. Walkhoff

Answer: B

Explanation: A) Francis Mouyen developed the first digital imaging system called RadioVisioGraphy in 1987.

• Francis Mouyen developed the first digital imaging system called RadioVisioGraphy in 1987.
• Francis Mouyen developed the first digital imaging system called RadioVisioGraphy in 1987.
• Francis Mouyen developed the first digital imaging system called RadioVisioGraphy in 1987. 2 / 4

3 Copyright © 2018 Pearson Education, Inc.5) What New Orleans dentist first made practical use of x-rays in the treatment of dental patients?

• H. R. Raper
• G. M. Fitzgerald
• F. Mouyen
• C. E. Kells

Answer: D

Explanation: A) C. Edmund Kells took the first dental radiograph on a living subject in the United States. He was the first to put the radiograph to practical use in dentistry. Dr. Kells made numerous presentations to organized dental groups and was instrumental in convincing many dentists that they should use oral radiography as a diagnostic tool.

• C. Edmund Kells took the first dental radiograph on a living subject in the United States. He

was the first to put the radiograph to practical use in dentistry. Dr. Kells made numerous presentations to organized dental groups and was instrumental in convincing many dentists that they should use oral radiography as a diagnostic tool.

• C. Edmund Kells took the first dental radiograph on a living subject in the United States. He

was the first to put the radiograph to practical use in dentistry. Dr. Kells made numerous presentations to organized dental groups and was instrumental in convincing many dentists that they should use oral radiography as a diagnostic tool.

• C. Edmund Kells took the first dental radiograph on a living subject in the United States. He

was the first to put the radiograph to practical use in dentistry. Dr. Kells made numerous presentations to organized dental groups and was instrumental in convincing many dentists that they should use oral radiography as a diagnostic tool.6) Early researchers working in the field of radiography were not aware that continued exposure to x-rays produced accumulations of radiation effects in the body because x-rays are invisible.

• Both the statement and reason are correct and related.
• Both the statement and reason are correct but not related.
• The statement is correct, but the reason is not.
• The statement is not correct, but the reason is correct.
• Neither the statement nor the reason is correct.

Answer: A

Explanation: A) Because x-rays are invisible, scientists and researchers working in the field of radiography were not aware that continued exposure produced accumulations of radiation effects in the body and therefore could be dangerous to both patient and radiographer.

• Because x-rays are invisible, scientists and researchers working in the field of radiography

were not aware that continued exposure produced accumulations of radiation effects in the body and therefore could be dangerous to both patient and radiographer.

• Because x-rays are invisible, scientists and researchers working in the field of radiography

were not aware that continued exposure produced accumulations of radiation effects in the body and therefore could be dangerous to both patient and radiographer.

• Because x-rays are invisible, scientists and researchers working in the field of radiography

were not aware that continued exposure produced accumulations of radiation effects in the body and therefore could be dangerous to both patient and radiographer.

• Because x-rays are invisible, scientists and researchers working in the field of radiography

were not aware that continued exposure produced accumulations of radiation effects in the body and therefore could be dangerous to both patient and radiographer. 3 / 4

4 Copyright © 2018 Pearson Education, Inc.

7) The most significant advancement in the early days of radiography came in 1913 when W. D.Coolidge

• became the first to alert the profession of the dangers of radiation exposure and advocated for

the science of radiation protection.

• exposed a prototype of a dental radiograph, setting the stage for preventive oral health care.
• developed a variable, high kilovoltage x-ray machine compatible with the paralleling

technique.

• introduced an x-ray tube that allowed for an x-ray output that could be predetermined and

accurately controlled.

Answer: D

Explanation: A) The introduction of the Coolidge tube allowed for an x-ray output that could be predetermined and accurately controlled.

• The introduction of the Coolidge tube allowed for an x-ray output that could be

predetermined and accurately controlled.

• The introduction of the Coolidge tube allowed for an x-ray output that could be

predetermined and accurately controlled.

• The introduction of the Coolidge tube allowed for an x-ray output that could be

predetermined and accurately controlled.8) The first dental radiograph was produced using an exposure time of

• 0.5 second.
• 1 minute.
• 5 minutes.
• 25 minutes.
• 1 hour.

Answer: D

Explanation: A) Dr. Otto Walkhoff, a German physicist, was the first to expose a prototype of a dental radiograph. This was accomplished by covering a small, glass photographic plate with black paper to protect it from light and then wrapping it in a sheath of thin rubber to prevent moisture damage during the 25 minutes that he held the film in his mouth.

• Dr. Otto Walkhoff, a German physicist, was the first to expose a prototype of a dental

radiograph. This was accomplished by covering a small, glass photographic plate with black paper to protect it from light and then wrapping it in a sheath of thin rubber to prevent moisture damage during the 25 minutes that he held the film in his mouth.

• Dr. Otto Walkhoff, a German physicist, was the first to expose a prototype of a dental

radiograph. This was accomplished by covering a small, glass photographic plate with black paper to protect it from light and then wrapping it in a sheath of thin rubber to prevent moisture damage during the 25 minutes that he held the film in his mouth.

• Dr. Otto Walkhoff, a German physicist, was the first to expose a prototype of a dental

radiograph. This was accomplished by covering a small, glass photographic plate with black paper to protect it from light and then wrapping it in a sheath of thin rubber to prevent moisture damage during the 25 minutes that he held the film in his mouth.

• Dr. Otto Walkhoff, a German physicist, was the first to expose a prototype of a dental

radiograph. This was accomplished by covering a small, glass photographic plate with black paper to protect it from light and then wrapping it in a sheath of thin rubber to prevent moisture damage during the 25 minutes that he held the film in his mouth.

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