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Principles and Techniques 6th Edition
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by Joen Iannucci & Laura Jansen Howerton Chapter
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s 1 - 35 | Complete
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,Chapter 01: Radiation History
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Iannucci: Dental Radiography, 6th Edition
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MULTIPLE CHOICE r
1. Radiation is defined as r r r
a. a form of energy carried by waves or streams of particles.
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b. a beam of energy that has the power to penetrate substances and record im agesh
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adows on a receptor. r r r
c. a high- r
energy radiation produced by the collision of a beam of electrons with amet al t
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arget in an x-ray tube. r r r r
d. a branch of medicine that deals with the use of x-rays.
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ANSWER:C A r
Radiation is a form of energy carried by waves or streams of particles. An x-
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ray is a beam ofenergy that has the power to penetrate substances and record image shad ows on
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a receptor.
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X-radiation is a high- r r r
energy radiation produced by the collision of a beam of electrons with ametal target in an x-
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ray tube. Radiology is a branch of medicine that deals with the use of
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x-rays.
DIF: Recall REF: Page 2 OBJ: 1 r r
TOP: CDA, RHS, III.B.2. Describe the characteristics of x-radiation
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MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysic sand r
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adiobiology
2. A radiograph is defined as
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a. a beam of energy that has the power to penetrate substances and record im agesh
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adows on a receptor. r r r
b. a picture on film produced by the passage of x-rays through an object or body.
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c. the art and science of making radiographs by the exposure of an image recepto r tox
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-rays.
d. a form of energy carried by waves or a stream of particles.
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ANSWER:C B r
An x- r
ray is a beam of energy that has the power to penetrate substances and record image shad ows on
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ra receptor. A radiograph is a picture on film produced by the passage of x-
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rays through an object or body. Radiography is the art and science of making dental imag es by
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theexposure of a receptor to x-
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rays. Radiation is a form of energy carried by waves or streams of particles.
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DIF: Comprehension REF: Page 2 r
OBJ: 1TOP: CDA, RHS, III.B.2. Describe the characteristics of x-r r r r r r r r r r
radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.1 Principles of radiophysic sand r
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adiobiology
3. YourCpatient asked you why dental images are important. Which of the following is theco
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rrect response? r
a. An oral examination with dental images limits the practitioner to what is se enclin
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ically.
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.
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d. Many dental diseases are typically discovered only through the use of den talim
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ages.
ANSWER:C D r
An oral examination without dental images limits the practitioner to what is seen clinically. Many d
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ental diseases and conditions produce no clinical signs and symptoms. Dental images are a necessa
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ry component of comprehensive patient care. Many dental diseases are typicall y discovered only
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through the use of dental images. r r r r r
DIF: Application REF: Page 2 OBJ: 2 r r
TOP: CDA, RHS, III.B.2. Describe the characteristics of x-radiation
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MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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4. The x-ray was discovered by
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a. Heinrich Geissler r
b. Wilhelm Roentgen r
c. Johann Hittorf r
d. William Crookes r
ANSWER:C B r
Heinrich Geissler built the first vacuum tube in 1838. Wilhelm Roentgen discovered the x-
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ray on November 8, 1895. Johann Hittorf observed in 1870 that discharges emitted from t he neg
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ative electrode of a vacuum tube traveled in straight lines, produced heat, and result ed in a greenis
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h fluorescence. William Crookes discovered in the late 1870s that cathode r ays were streams of c
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harged particles. r
DIF: Recall REF: Page 2 OBJ: 4 r r
TOP: CDA, RHS, III.B.2. Describe the characteristics of x-radiation
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MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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5. Who exposed the first dental radiograph in the United States using a live person?
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a. Otto Walkoff r
b. Wilhelm Roentgen r
c. Edmund Kells r
d. Weston Price r
ANSWER:C C r
Otto Walkoff was a German dentist who made the first dental radiograph. Wilhelm Roentg enwas
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a Bavarian physicist who discovered the x-
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ray. Edmund Kells exposed the first dental radiograph in the United States using a live pers on.
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Price introduced the bisecting technique in 1904. r r r r r r
DIF: Recall REF: Page 4 OBJ: 5 r r
TOP: CDA, RHS, III.B.2. Describe the characteristics of x-radiation
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MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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6. Current fast radiographic film requires r r r r
% less exposure time than the initial exposuretimes used in 1920.
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a. 33
b. 98
c. 73
, d. 2
ANSWER:C D r
Current fast radiographic film requires 98% less exposure time than the initial exposure ti mesus
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ed in 1920.
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DIF: Comprehension REF: Page 5 r
OBJ: 6TOP: CDA, RHS, III.B.2. Describe the characteristics of x- r r r r r r r r r r
radiation
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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7. Who modified the paralleling technique with the introduction of the long-cone technique?
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a. C. Edmund Kells r r
b. Franklin W. McCormack r r
c. F. Gordon Fitzgerald r r
d. Howard Riley Raper r r
ANSWER:C C r
C. Edmund Kells introduced the paralleling technique in 1896. Franklin W. McCormack r eintro
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duced the paralleling technique in 1920. F. Gordon Fitzgerald modified the parallelin gtechnique
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with the introduction of the long-
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cone technique. This is the technique currently used. Howard Riley Raper modified the bi sectin
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g technique and introduced the bite-wing technique in 1925.
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DIF: Recall REF: Page 4 OBJ: 7 r r
TOP: CDA, RHS, III.B.2. Describe the characteristics of x-radiation
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MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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8. Which of the following is an advantage of digital imaging?
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a. Increased patient radiation exposure r r r
b. Increased patient comfort r r
c. Increased speed for viewing images r r r r
d. Increased chemical usage r r
ANSWER:C C r
Patient exposure is reduced with digital imaging. Digital sensors are more sensitive to x-
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rays than film. Digital sensors are rigid and bulky, causing decreased patient comfort. The i mage
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from digital sensors is uploaded directly to the computer and monitor without the nee d for chemi
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cal processing. This allows for immediate interpretation and evaluation. The ima ge fromdigital se
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nsors is uploaded directly to the computer and monitor without the need f or chemicalprocessin
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g.
DIF: Comprehension REF: Page 6 r
OBJ: 7 TOP: CDA, RHS, I.B.2. Demonstrate basic knowledge of di gital r r r r r r r r r r r r
radiography
MSC: NBDHE, 2.0 Obtaining and Interpreting Radiographs | NBDHE, 2.5 General
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9. Which discovery was the precursor to the discovery of x-rays?
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a. Beta particles r
b. Alpha particles r
c. Cathode rays r
d. Radioactive materials r
ANSWER:C C r