TEST BANK : TITLE OF TEXTBOOK: DENTAL
RADIOGRAPHY, PRINCIPLES AND TECHNIQUES,
JOEN IANNUCCI & LAURA JANSEN HOWERTON, 6TH
EDITION
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Chapter 01: Radiation History
MULTIPLE CHOICE
̣
1. Radiation is defined as
a. a form
̣ of ̣ energy carried by waves or streams of ̣ particles.
b. a beam of ̣ energy that has the power to penetrate substances and record image
shadows on a receptor.
c. a high-energy radiation produced by the collision of ̣ a beam of ̣ electrons with a
metal target in an x-ray tube.
d. a branch of ̣ medicine that deals with the use of ̣ x-rays.
ANS: A
Radiation is a form
̣ of ̣ energy carried by waves or streams of ̣ particles. An x-ray is a beam of ̣
energy that has the power to penetrate substances and record image shadows on a receptor. X-
radiation is a high-energy radiation produced by the collision of ̣ a beam of ̣ electrons with a
metal target in an x-ray tube. Radiology is a branch of ̣ medicine that deals with the use of ̣ x-
rays.
DIF: Recall REF: Page 2 OBJ: 1
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of ̣radiophysics
and radiobiology
̣
2. A radiograph is defined as
a. a beam of ̣ energy that has the power to penetrate substances and record image
shadows on a receptor.
b. a picture on film
̣ produced by the passage of ̣ x-rays through an object or body. c. the
art and science of ̣ making radiographs by the exposure of ̣ an image receptor to x-
rays.
d. a form
̣ of ̣ energy carried by waves or a stream of ̣ particles.
ANS: B
An x-ray is a beam of ̣ energy that has the power to penetrate substances and record image
shadows on a receptor. A radiograph is a picture on film ̣ produced by the passage of ̣ x-rays
through an object or body. Radiography is the art and science of ̣ making dental images by the
exposure of ̣ a receptor to x-rays. Radiation is a form
̣ of ̣ energy carried by waves or streams of ̣
particles.
DIF: Comprehension REF: Page 2 OBJ: 1
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of ̣radiophysics
and radiobiology
3. Your patient asked you why dental images are important. Which of ̣ the following
̣ is the
correct response?
a. An oral examination with dental images limits the practitioner to what is seen
clinically.
b. All dental diseases and conditions produce clinical signs and symptoms.
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c. Dental images are not a necessary component of ̣ comprehensive patient care.
d. Many dental diseases are typically discovered only through the use of ̣ dental
images.
ANS: D
An oral examination without dental images limits the practitioner to what is seen clinically.
Many dental diseases and conditions produce no clinical signs and symptoms. Dental images
are a necessary component of ̣ comprehensive patient care. Many dental diseases are typically
discovered only through the use of ̣ dental images.
DIF: Application REF: Page 2 OBJ: 2
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
4. The x-ray was discovered by
a. Heinrich Geissler
b. Wilhelm Roentgen
c. Johann Hittorf ̣
d. William Crookes
ANS: B
Heinrich Geissler built the first
̣ vacuum tube in 1838. Wilhelm Roentgen discovered the x-
ray on November 8, 1895. Johann Hittorf ̣ observed in 1870 that discharges emitted from ̣ the
negative electrode of ̣ a vacuum tube traveled in straight lines, produced heat, and resulted in a
greenish fluorescence.
̣ William Crookes discovered in the late 1870s that cathode rays were
streams of ̣ charged particles.
DIF: Recall REF: Page 2 OBJ: 4
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
5. Who exposed the first
̣ dental radiograph in the United States using a live person?
a. Otto Walkoff̣ ̣
b. Wilhelm Roentgen
c. Edmund Kells
d. Weston Price
ANS: C
Otto Walkoff̣ ̣ was a German dentist who made the first
̣ dental radiograph. Wilhelm Roentgen
was a Bavarian physicist who discovered the x-ray. Edmund Kells exposed the first ̣ dental
radiograph in the United States using a live person. Price introduced the bisecting technique
in 1904.
DIF: Recall REF: Page 4 OBJ: 5
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
6. Current fast
̣ radiographic film
̣ requires % less exposure time than the initial exposure
times used in 1920.
a. 33
b. 98
c. 73
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d. 2
ANS: D
Current fast
̣ radiographic film
̣ requires 98% less exposure time than the initial exposure times
used in 1920.
DIF: Comprehension REF: Page 5 OBJ: 6
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
̣ the paralleling technique with the introduction of ̣ the long-cone technique?
7. Who modified
a. C. Edmund Kells
b. Franklin W. McCormack
c. F. Gordon Fitzgerald
d. Howard Riley Raper
ANS: C
C. Edmund Kells introduced the paralleling technique in 1896. Franklin W. McCormack
reintroduced the paralleling technique in 1920. F. Gordon Fitzgerald modified ̣ the paralleling
technique with the introduction of ̣ the long-cone technique. This is the technique currently
used. Howard Riley Raper modified ̣ the bisecting technique and introduced the bite-wing
technique in 1925.
DIF: Recall REF: Page 4 OBJ: 7
TOP: CDA, RHS, III.B.2. Describe the characteristics of ̣x-radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
8. Which of ̣ the following
̣ is an advantage of ̣ digital imaging?
a. Increased patient radiation exposure
b. Increased patient comfort ̣
c. Increased speed foṛ viewing images
d. Increased chemical usage
ANS: C
Patient exposure is reduced with digital imaging. Digital sensors are more sensitive to x-rays
than film.
̣ ̣ The image
Digital sensors are rigid and bulky, causing decreased patient comfort.
from
̣ digital sensors is uploaded directly to the computer and monitor without the need for
̣
chemical processing. This allows for ̣ immediate interpretation and evaluation. The image from
̣
digital sensors is uploaded directly to the computer and monitor without the need for
̣ chemical
processing.
DIF: Comprehension REF: Page 6 OBJ: 7
TOP: CDA, RHS, I.B.2. Demonstrate basic knowledge of ̣digital radiography
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
9. Which discovery was the precursor to the discovery of ̣ x-rays?
a. Beta particles
b. Alpha particles
c. Cathode rays
d. Radioactive materials
ANS: C