Dental Radiography Principles and Techniques 5th Edition By Joen Iannucci; Laura Howerton

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j Techniques,5thEdition byJoen Iannucci, Laura j j j j j j




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Chapter01: Radiation History j j j




Iannucci:Dental Radiography,5thEdition j j j j




MULTIPLECHOICE j




1. Radiation is defined as j j j




a. aform of energycarried bywaves or streams of particles.
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b. abeamofenergythathasthepowertopenetratesubstancesand recordimageshadows on a
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receptor.
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c. ahigh-energyradiationproducedbythecollisionofabeamofelectronswithametal target in
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an x-ray tube.
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d. abranchofmedicinethatdealswiththe use
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of x-rays.
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ANS: A j




Radiation is a form of energy carried by waves or streams of particles. An x-ray is a beam of energy that
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has the power to penetrate substances and record image shadows on a receptor. X- radiationisahigh-
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energyradiationproducedbythecollisionofabeamof electronswithametal target in an x-ray tube.
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Radiology is a branch of medicine that deals with the use of x-rays.
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DIF: Recall REF: Page2 OBJ: 1 j j j j j j




TOP: CDA, RHS, III.B.2. Describethe characteristics of x-radiation
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MSC:NBDHE,2.0ObtainingandInterpretingRadiographs |NBDHE,2.1Principlesof radiophysics
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and radiobiology
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2. Aradiograph isdefined as
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a. abeamofenergythathasthepowertopenetratesubstancesand recordimage
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shadows on a receptor.
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b. apictureonfilmproducedbythepassage of
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x-rays through an object or body.
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c. theartandscienceofmakingradiographs bytheexposureofan imagereceptortox- rays.
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d. aformofenergycarriedbywavesora
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stream of particles.
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ANS: B j




An x-ray is a beam of energy that has the power to penetrate substances and record image shadows on a
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receptor. A radiograph is a picture on film produced by the passage of x- rays throughan object orbody.
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Radiographyistheart and scienceofmakingdental imagesbythe exposureof areceptorto x-rays.
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Radiationis aform ofenergycarried bywavesorstreamsof particles.
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DIF: Comprehension REF: Page2 OBJ:1TOP:CDA,RHS, III.B.2.Describethe j j j j j j j j j j




characteristics of x-radiation
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MSC:NBDHE,2.0ObtainingandInterpretingRadiographs |NBDHE,2.1Principlesof radiophysics
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and radiobiology
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3. Yourpatientasked you whydentalimagesareimportant.Whichofthe followingisthe correct
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response?
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a. Anoralexaminationwithdentalimages
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limitsthepractitionertowhatisseenclinically.
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b. Alldentaldiseasesandconditionsproduce
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clinical signs and symptoms.
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c. Dental images are not a necessary j j j j j




componentofcomprehensivepatientcare.
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d. Many dental diseases are typically j j j j




discoveredonlythroughtheuseofdentalimages.
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ANS: D
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An oral examination without dental images limits the practitioner to what is seen clinically. Many
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dentaldiseases andconditionsproduceno clinicalsignsandsymptoms.Dentalimagesare
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anecessarycomponentofcomprehensivepatient care.Manydentaldiseasesaretypically discovered
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only through the use of dental images.
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DIF: Application REF: Page 2 OBJ: 2 j j j j j




TOP:CDA, RHS, III.B.2. Describethe characteristics of x-radiation
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MSC:NBDHE, 2.0 Obtainingand InterpretingRadiographs |NBDHE, 2.5 General
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4. Thex-raywas discovered by
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a. HeinrichGeissler j




b. Wilhelm Roentgen j




c. Johann Hittorf j




d. WilliamCrookes j




ANS: B
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HeinrichGeisslerbuiltthe firstvacuumtubein1838.WilhelmRoentgendiscoveredthex-rayon
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November 8, 1895. Johann Hittorf observed in 1870 that discharges emitted from the negative electrode
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of a vacuum tube traveled in straight lines, produced heat,
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andresultedinagreenish fluorescence.WilliamCrookesdiscoveredinthelate1870sthat cathode
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rays were streams of charged particles.
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TOP:CDA, RHS, III.B.2. Describethe characteristics of x-radiation
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MSC:NBDHE, 2.0 Obtainingand InterpretingRadiographs |NBDHE, 2.5 General
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5. Whoexposed the first dental radiograph in the United States usinga live person?
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a. Otto Walkoff j




b. Wilhelm Roentgen j




c. Edmund Kells j




d. WestonPrice j




ANS: C
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Otto Walkoff was a German dentist who made the first dental radiograph. Wilhelm Roentgen was a
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Bavarian physicist who discovered the x-ray. Edmund Kells exposed the first dental radiographinthe
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UnitedStatesusingaliveperson.Priceintroducedthebisectingtechniquein 1904.
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TOP:CDA, RHS, III.B.2. Describethe characteristics of x-radiation
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MSC:NBDHE, 2.0 Obtainingand InterpretingRadiographs |NBDHE, 2.5 General
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6. Current fast radiographic film requires j j j j %lessexposuretimethantheinitial
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exposure times used in 1920.
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a. 33
b. 98
c. 73
d. 2
ANS: D j




Currentfastradiographicfilmrequires98%lessexposuretimethantheinitialexposuretimes used in
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1920.
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DIF: Comprehension REF: Page5 OBJ:6TOP:CDA,RHS, III.B.2.Describethej j j j j j j j j j




characteristics of x-radiation
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MSC:NBDHE, 2.0 Obtainingand InterpretingRadiographs |NBDHE, 2.5 General
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7. Whomodifiedtheparallelingtechniquewiththeintroductionofthe long-cone
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technique?
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a. C. Edmund Kells j j




b. Franklin W. McCormack j j




c. F. Gordon Fitzgerald
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d. HowardRileyRaper j j




ANS: C
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C. Edmund Kells introduced the paralleling technique in 1896. Franklin W. McCormack reintroduced
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theparallelingtechniquein1920.F.GordonFitzgeraldmodifiedtheparalleling
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