IOWA DENTAL BOARD RADIOGRAPHY STUDY
GUIDE 2026 COMPLETE QUESTIONS AND
VERIFIED SOLUTIONS
◉Acute Exposure . Answer: large, single exposure to radiation; person
develops symptoms of acute radiation syndrome
◉ALARA . Answer: "as low as reasonably achievable"; using the least
amount of radiation to gain the maximum amount of benefit
◉Archive . Answer: historical; films with archive value will not
diminish in quality over time; archive quality is affected by processing
and film age
◉Artifact . Answer: a blemish or image in the radiograph that is not
present in the actual object
◉Atom . Answer: the smallest particle of an element that has properties
of that element. Atoms are extremely minute and are composed of a
number of subatomic particles
◉Barrier Envelope Packet . Answer: clear, plastic "baggie" that film can
be placed in during exposure; prevents film from becoming
contaminated with saliva
, ◉Barriers . Answer: any material that is used to prevent the transmission
of infective pathogens
◉Central rays (CR) . Answer: the central portion of the primary beam of
radiation
◉Cephalometric . Answer: lateral and posteroanterior extraoral head
films
◉Cephalostat . Answer: a device used to stabilize the patient's head in a
plane that is parallel to the film and at right angles to the central rays of
the x-ray beam
◉Charged-coupled device . Answer: a CCD is a solid-state detector used
in many electronic devices. A CCD used in radiography is an image
receptor found in the intraoral sensor, which converts x-rays into
electrons
◉Chronic exposure . Answer: low level exposures to radiation over a
long period of time
◉Collimator . Answer: a diaphragm, usually lead, designed to restrict
the dimensions of the useful beam; looks like a lead washer
GUIDE 2026 COMPLETE QUESTIONS AND
VERIFIED SOLUTIONS
◉Acute Exposure . Answer: large, single exposure to radiation; person
develops symptoms of acute radiation syndrome
◉ALARA . Answer: "as low as reasonably achievable"; using the least
amount of radiation to gain the maximum amount of benefit
◉Archive . Answer: historical; films with archive value will not
diminish in quality over time; archive quality is affected by processing
and film age
◉Artifact . Answer: a blemish or image in the radiograph that is not
present in the actual object
◉Atom . Answer: the smallest particle of an element that has properties
of that element. Atoms are extremely minute and are composed of a
number of subatomic particles
◉Barrier Envelope Packet . Answer: clear, plastic "baggie" that film can
be placed in during exposure; prevents film from becoming
contaminated with saliva
, ◉Barriers . Answer: any material that is used to prevent the transmission
of infective pathogens
◉Central rays (CR) . Answer: the central portion of the primary beam of
radiation
◉Cephalometric . Answer: lateral and posteroanterior extraoral head
films
◉Cephalostat . Answer: a device used to stabilize the patient's head in a
plane that is parallel to the film and at right angles to the central rays of
the x-ray beam
◉Charged-coupled device . Answer: a CCD is a solid-state detector used
in many electronic devices. A CCD used in radiography is an image
receptor found in the intraoral sensor, which converts x-rays into
electrons
◉Chronic exposure . Answer: low level exposures to radiation over a
long period of time
◉Collimator . Answer: a diaphragm, usually lead, designed to restrict
the dimensions of the useful beam; looks like a lead washer
