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Radiology Practice Test
How do you correct a foreshortened image? - correct answer decrease the vertical angulation What type of radiation is most dangerous? - correct answer all is equally dangerous What is an impregnated sheet? - correct answer lead apron When is it acceptable for the operator to hold an x-ray in the patient's mouth? - correct answer never What is the Gonadal region? - correct answer male reproductive organs What is the purpose of an aluminum filter? - correct answer to filter out the low and long energy rays What material is a collimator made of? - correct answer lead What size periapical film is most likely to be used on a small child? - correct answer 0 How do you correct an elongated image? - correct answer increase the vertical angulation How will a film appear if it is accidentally struck by light? - correct answer black
How will a film appear if it was unexposed? - correct answer clear What is another term for bite-wing x-rays? - correct answer interproximal True or false, can metal be penetrated by x-rays? - correct answer true How do you protect the reproductive organs? - correct answer by using a lead apron How many x-rays may be taken on a pregnant woman? - correct answer as few as possible What does an occlusal film effectively view? - correct answer the dental arch What might an occlusal film find? - correct answer abnormalities in the dental arch Foreshortening is the result of what? - correct answer too much vertical angulation What causes an overlapped image? - correct answer improper horizontal angulation Radiolucent or Radiopaque mental foramen - correct answer radiolucent Radiolucent or Radiopaque caries - correct answer radiolucent
X-rays that are exposed in the mouth are high or low energy? - correct answer high energy (short wavelengths) A panoramic film is not acceptable in detecting what? - correct answer decay How far should you stand away from the source? - correct answer 6 feet Using fast film does what? - correct answer reduces exposure to the patient What is the purpose of the aluminum filter? - correct answer to filter out low and long energy rays which are useless The diameter of the x-ray beam, may not exceed? - correct answer 2 3/ True or false, does a film badge evaluate exposure the patient receives? - correct answer false (they are for the operator) What happens if you expose a film on the wrong side? - correct answer you will get a herringbone effect How often should x-rays be taken? - correct answer as often as the dentist deems necessary Why should x-rays be taken of injured teeth? - correct answer because it is the best way to diagnose the teeth How will your film appear if you have a light leak into the daylight loader? - correct answer black edge
How thick is an impregnated sheet? - correct answer .25 mm What is cross contamination - correct answer spreading microorganisms from one person to another X-ray films pose the most risk for - correct answer cross contamination What is a good method to prevent cross contamination in regards to x-ray films? - correct answer film packet barriers Who discovered x-rays - correct answer Wilhelm Conran Roentgen When were x-rays discovered - correct answer 1895 X-rays travel at what speed? - correct answer 186, miles per second. What is cross-contamination? - correct answer The spreading of microorganisms from one person to another. Blurred radiographs may result from? - correct answer Movement during exposure Radiographs that show only the crowns of the teeth are? - correct answer Interproximal/BWX What is the fastest film type? - correct answer F Extraoral films are best used for? - correct answer Orthodontics
What is the minimum required size of the lead apron to protect the reproductive organs/gonadal region? - correct answer 1 foot by 2 feet If the dentist thinks an x-ray is necessary for proper treatment - correct answer there should be no hesitation about taking the x-ray What is the embossed dot on an x-ray? - correct answer To help determine left from right when mounting A radiolucent structure appears? - correct answer Black A radiopaque structure appears? - correct answer White, light, and shades of gray Radiolucent or Radiopaque: Periodontal ligament - correct answer Radiolucent Radiolucent or Radiopaque: Maxillary Sinus - correct answer Radiolucent Which PPE should be worn while taking x-rays? - correct answer Glasses, gown, mask, gloves What does the grain size/crystals on a film do to the speed? - correct answer The fastest films have the largest grains The use of film badges serves all of these purposes except: - correct answer Evaluate exposure patient receives Are Developer and fixer solutions sterilizing agents? - correct answer No
X-rays that expose the film in the mouth are: - correct answer High energy A barrier should be placed: - correct answer Wherever the operators touches The difference between sterilization and disinfection is: - correct answer Sterilization destroys all life forms
