,CHAPTER 1:INTRODUCTION TO RADIOLOGIC SCIENCE k& k & k& k &
1. Whichofthe followingbest describes the primary purpose ofdiagnostic rad
k& jl jl k& k& k& k& k
iography?
&
A. Totreatdiseasesusingionizing radiation
jl jl jl k &
B. Toproduceimages ofinternal structuresfordiagnosis k& k& jl
C. Tomonitorpatient vitalsigns jl
D. Tosterilize medicalequipment
jl k&
Answer:B
Rationale:Diagnosticradiography’smain purposeis toproduceimages ofinternal bod jl k& k& jl k & k&
ystructures,allowing physicians todetectand diagnoseabnormalities. Options A, C,
k& jl k& k& jl jl k& k & k& k&
a nd D are unrelated to diagnostic imaging.
k& k& k& k& k & k& k&
2. Whatisthe primary sourceofionizing radiationinmedicalimaging?
jl k& k& jl k& jl
A. MRIscanner
B. X-raytube
C. Ultrasound transducer jl
D. PETscanner
Answer:B Ratio k&
nale:TheX-
ray tubegenerates ionizing radiation usedin diagnosticradiography.MRIandultra
k& k & k & k & k& k& jl jl
sound usenon- jl jl
ionizing energy,while PETuses radioactive tracers ratherthan producingradiation inatub
k& k& k& k& k& k& k& jl k&
e.
3. HowdoestheALARA principle guideradiologicpractice?
jl jl jl k& jl
A. Maximizing imagequality regardlessofdose k& k&
B. Minimizing radiationexposurewhile achieving diagnosticquality k& k& k&
C. Limiting patient interaction to reduceinfection k& jl k& jl jl
D. Increasingexposuretime forbetterpenetration jl k&
Answer:B
Rationale:ALARA (“As LowAs ReasonablyAchievable”) ensures patient andstaf fr jl jl jl k& k & k& jl k& k&
eceivetheminimum radiation dosenecessaryfordiagnostic-quality images. k& k& jl k&
,4. A radiologictechnologistis preparing to imagea patientwith asuspected fra
k& k& jl k& k& k& k& k
cture. Which safety measure is most important?
& k& k& k& k& k& k&
A. Usingthefastestimaging speedjl jl jl k&
B. Ensuringproperpatient shielding andpositioning jl k&
C. Increasingexposuretoreducerepeat images jl k& jl
D. Allowing thepatienttomoveduring imaging k& jl k&
Answer:B
Rationale:Propershielding andpositioning minimize unnecessaryexposureand prote ct r k& k& k& jl k& k& jl
adiosensitive tissues.Options A, C,and Dcan increase radiation risk or degrade im age qu
k & k& k& k& k& k& k& k & k& k& k& k& jl
ality.
5. Scenario:A45-year-
old patient expresses concernaboutradiation exposure.How shouldthetechnolog ist resp
k & jl jl jl k& k& k& k& jl
ond?
A. Ignoretheirconcerns;radiation is safe
jl k& k&
B. Explain thatdoseisminimized andbenefits outweigh risks
k& jl k& k & jl k& k&
C. Refusetoperformthe exam k& jl k&
D. Increaseexposuretoensurebetter images jl jl k&
Answer:B
Rationale:Patientsshould beinformed aboutthelow doseandthediagnosticbenefits k& jl k& k& jl k& k&
,reducing anxiety and promoting informedconsent.
k& k& k& k& k& k&
6. Which professionalorganizationestablishes standards for radiologic te
k& jl k& k& k& k& k
chnologists?
&
A. WHO
B. ASRT
C. FDA
D. CDC
Answer:B
Rationale: The American Society of Radiologic Technologists (ASRT) sets education
k& k& k& k& k& k& k& k& k&
al andprofessionalstandards.FDA regulates equipment, CDC focusesoninfection cont
k& k& jl k& k& k& k &
r ol, WHO onglobal health.
k& k& k& k&
, 7. Whichimagingmodalitydoesnot useionizing radiation?
jl k& k&
A. CTscan
B. MRI
C. X-ray
D. Fluoroscopy
Answer:B
Rationale:MRIusesmagnetic fields andradiowaves,which arenon-ionizing. CT,X-
jl jl k& k& jl k& jl k& jl
ray, andfluoroscopyall useionizing radiation.
k& k& k &
8. Whatisthe mostradiosensitivetissueinthehuman body?
jl k& jl k&
A. Muscle
B. Skin
C. Bonemarrow
D. Cartilage
Answer:C
Rationale:Bonemarrowcontainsrapidlydividing cells,making it highly sensitivetoio niz
jl jl k& k& jl k& k& k&
ing radiation. Muscle, skin, andcartilage are less sensitive.
k & k& k& k& k& jl
9. Whichfactorprimarily affectsthe quality ofanX-ray image?
jl k& jl k& jl k&
A. Patient diet jl
B. Tubevoltageand current k&
C. Roomtemperature
jl
D. Technologist height jl
Answer:B
Rationale:Tubevoltage (kVp) andcurrent (mA) controlX-
jl k& k& k& k&
rayenergy andphotonquantity, directly affecting image quality.
k& k & k& jl k &
10. Howoftenshouldradiologicequipment be testedforquality assurance?
jl jl jl &
k k&
A. Daily
B. Monthly
C. Annually
D. Onlywhenmalfunction occurs k&
1. Whichofthe followingbest describes the primary purpose ofdiagnostic rad
k& jl jl k& k& k& k& k
iography?
&
A. Totreatdiseasesusingionizing radiation
jl jl jl k &
B. Toproduceimages ofinternal structuresfordiagnosis k& k& jl
C. Tomonitorpatient vitalsigns jl
D. Tosterilize medicalequipment
jl k&
Answer:B
Rationale:Diagnosticradiography’smain purposeis toproduceimages ofinternal bod jl k& k& jl k & k&
ystructures,allowing physicians todetectand diagnoseabnormalities. Options A, C,
k& jl k& k& jl jl k& k & k& k&
a nd D are unrelated to diagnostic imaging.
k& k& k& k& k & k& k&
2. Whatisthe primary sourceofionizing radiationinmedicalimaging?
jl k& k& jl k& jl
A. MRIscanner
B. X-raytube
C. Ultrasound transducer jl
D. PETscanner
Answer:B Ratio k&
nale:TheX-
ray tubegenerates ionizing radiation usedin diagnosticradiography.MRIandultra
k& k & k & k & k& k& jl jl
sound usenon- jl jl
ionizing energy,while PETuses radioactive tracers ratherthan producingradiation inatub
k& k& k& k& k& k& k& jl k&
e.
3. HowdoestheALARA principle guideradiologicpractice?
jl jl jl k& jl
A. Maximizing imagequality regardlessofdose k& k&
B. Minimizing radiationexposurewhile achieving diagnosticquality k& k& k&
C. Limiting patient interaction to reduceinfection k& jl k& jl jl
D. Increasingexposuretime forbetterpenetration jl k&
Answer:B
Rationale:ALARA (“As LowAs ReasonablyAchievable”) ensures patient andstaf fr jl jl jl k& k & k& jl k& k&
eceivetheminimum radiation dosenecessaryfordiagnostic-quality images. k& k& jl k&
,4. A radiologictechnologistis preparing to imagea patientwith asuspected fra
k& k& jl k& k& k& k& k
cture. Which safety measure is most important?
& k& k& k& k& k& k&
A. Usingthefastestimaging speedjl jl jl k&
B. Ensuringproperpatient shielding andpositioning jl k&
C. Increasingexposuretoreducerepeat images jl k& jl
D. Allowing thepatienttomoveduring imaging k& jl k&
Answer:B
Rationale:Propershielding andpositioning minimize unnecessaryexposureand prote ct r k& k& k& jl k& k& jl
adiosensitive tissues.Options A, C,and Dcan increase radiation risk or degrade im age qu
k & k& k& k& k& k& k& k & k& k& k& k& jl
ality.
5. Scenario:A45-year-
old patient expresses concernaboutradiation exposure.How shouldthetechnolog ist resp
k & jl jl jl k& k& k& k& jl
ond?
A. Ignoretheirconcerns;radiation is safe
jl k& k&
B. Explain thatdoseisminimized andbenefits outweigh risks
k& jl k& k & jl k& k&
C. Refusetoperformthe exam k& jl k&
D. Increaseexposuretoensurebetter images jl jl k&
Answer:B
Rationale:Patientsshould beinformed aboutthelow doseandthediagnosticbenefits k& jl k& k& jl k& k&
,reducing anxiety and promoting informedconsent.
k& k& k& k& k& k&
6. Which professionalorganizationestablishes standards for radiologic te
k& jl k& k& k& k& k
chnologists?
&
A. WHO
B. ASRT
C. FDA
D. CDC
Answer:B
Rationale: The American Society of Radiologic Technologists (ASRT) sets education
k& k& k& k& k& k& k& k& k&
al andprofessionalstandards.FDA regulates equipment, CDC focusesoninfection cont
k& k& jl k& k& k& k &
r ol, WHO onglobal health.
k& k& k& k&
, 7. Whichimagingmodalitydoesnot useionizing radiation?
jl k& k&
A. CTscan
B. MRI
C. X-ray
D. Fluoroscopy
Answer:B
Rationale:MRIusesmagnetic fields andradiowaves,which arenon-ionizing. CT,X-
jl jl k& k& jl k& jl k& jl
ray, andfluoroscopyall useionizing radiation.
k& k& k &
8. Whatisthe mostradiosensitivetissueinthehuman body?
jl k& jl k&
A. Muscle
B. Skin
C. Bonemarrow
D. Cartilage
Answer:C
Rationale:Bonemarrowcontainsrapidlydividing cells,making it highly sensitivetoio niz
jl jl k& k& jl k& k& k&
ing radiation. Muscle, skin, andcartilage are less sensitive.
k & k& k& k& k& jl
9. Whichfactorprimarily affectsthe quality ofanX-ray image?
jl k& jl k& jl k&
A. Patient diet jl
B. Tubevoltageand current k&
C. Roomtemperature
jl
D. Technologist height jl
Answer:B
Rationale:Tubevoltage (kVp) andcurrent (mA) controlX-
jl k& k& k& k&
rayenergy andphotonquantity, directly affecting image quality.
k& k & k& jl k &
10. Howoftenshouldradiologicequipment be testedforquality assurance?
jl jl jl &
k k&
A. Daily
B. Monthly
C. Annually
D. Onlywhenmalfunction occurs k&
