1. Radiationuisudefineduas
a. auformuofuenergyucarriedubyuwavesuorustreamsuofuparticles.
b. aubeamuofuenergyuthatuhasutheupowerutoupenetrateusubstancesuandurecorduimageu
shadowsuonuaureceptor.
c. auhigh-
energyuradiationuproducedubyutheucollisionuofuaubeamuofuelectronsuwithuaumetalut
argetuinuanux-rayutube.
d. aubranchuofumedicineuthatudealsuwithutheuuseuofux-rays.
ANSWER:u A
Radiationuisuauformuofuenergyucarriedubyuwavesuorustreamsuofuparticles.uAnux-
rayuisuaubeamuofuenergyuthatuhasutheupowerutoupenetrateusubstancesuandurecorduimageushadows
uonuaureceptor.
2. Auradiographuisudefineduas
a. aubeamuofuenergyuthatuhasutheupowerutoupenetrateusubstancesuandurecorduimageu
shadowsuonuaureceptor.
b. aupictureuonufilmuproducedubyutheupassageuofux-raysuthroughuanuobjectuorubody.
c. theuartuanduscienceuofumakinguradiographsubyutheuexposureuofuanuimageureceptorutou
x-rays.
d. auformuofuenergyucarriedubyuwavesuoruaustreamuofuparticles.
ANSWER:u B
Anux-
rayuisuaubeamuofuenergyuthatuhasutheupowerutoupenetrateusubstancesuandurecorduimageushadows
uonuaureceptor.u Auradiographuisuaupictureuonufilmuproducedubyutheupassageuofux-
, c. Dentaluimagesuareunotuaunecessaryucomponentuofucomprehensiveupatientucare.
d. Manyudentaludiseasesuareutypicallyudiscovereduonlyuthroughutheuuseuofudentalu
images.
ANSWER:u D
Anuoraluexaminationuwithoutudentaluimagesulimitsutheupractitionerutouwhatuisuseenuclinically.uMa
nyudentaludiseasesuanduconditionsuproduceunouclinicalusignsuandusymptoms.uDentaluimagesuareuau
necessaryucomponentuofucomprehensiveupatientucare.uManyudentaludiseasesuareutypicallyudiscov
ereduonlyuthroughutheuuseuofudentaluimages.
4. Theux-rayuwasudiscovereduby
a. HeinrichuGeissler
b. WilhelmuRoentgen
c. JohannuHittorf
d. WilliamuCrookes
ANSWER:u B
HeinrichuGeisslerubuiltutheufirstuvacuumutubeuinu1838.u WilhelmuRoentgenudiscovereduthe
x-
rayuonuNovemberu8,u1895.uJohannuHittorfuobserveduinu1870uthatudischargesuemittedufromutheu
negativeuelectrodeuofuauvacuumutubeutraveleduinustraightulines,uproduceduheat,uanduresulteduinua
ugreenishufluorescence.uWilliamuCrookesudiscovereduinutheulateu1870suthatucathodeuraysuwereu
5. WhouexposedutheufirstudentaluradiographuinutheuUniteduStatesuusinguauliveuperson?
a. OttouWalkoff
b. WilhelmuRoentgen
c. EdmunduKells
d. WestonuPrice
ANSWER:u C
OttouWalkoffuwasuauGermanudentistuwhoumadeutheufirstudentaluradiograph.uWilhelmuRoentgenu
wasuauBavarianuphysicistuwhoudiscoveredutheux-
ray.u EdmunduKellsuexposedutheufirstudentaluradiographuinutheuUniteduStatesuusinguauliveuperson.
uuuPriceuintroducedutheubisectingutechniqueuinu1904.
6. Currentufasturadiographicufilmurequires
%ulessuexposureutimeuthanutheuinitialuexposureutimesuuseduinu1920.
a. 33
b. 98
c. 73
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