Radiology #4

8 Questions | By Yarilsa | Last updated: Jan 17, 2013 | Total Attempts: 1335

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Questions and Answers

1.

Filters are used in the xray beam to
- A.
  
  Increase density
- B.
  
  Reduce density
- C.
  
  Reduce exposure size of the beam
- D.
  
  Reduce patient radiation dose
2.

Proper collimation of the x ray beam fog film size and focal film distance will
- A.
  
  Improve image definition
- B.
  
  Increase radiographic contrast
- C.
  
  Increase the intensity of the central beam
- D.
  
  Increase secondary radiation
- E.
  
  Reduce primary radiation
3.

The best way to describe the penetration of an x ray beam is by its
- A.
  
  Half value layer
- B.
  
  Kilovoltage
- C.
  
  Milliamperage
- D.
  
  Rad output
- E.
  
  Roentgen output
4.

The milliampere control dial on the dental x ray mchine
- A.
  
  Regulates the step up transformer
- B.
  
  Determines the penetration of the x ray
- C.
  
  Regulates the guality of the radiation
- D.
  
  Regulates the quantity of the radiation
- E.
  
  Regulates scatter radiation
5.

You have taken a radiograph of a patient with a large skeletal build . the resulting image does not show the bone trabeculation well and appers to underpenetrated. the adjustment that should be made for the retake is
- A.
  
  Reduce the ma
- B.
  
  Reduce the exposure time
- C.
  
  Increase the kvp
- D.
  
  Reduce the kvp
- E.
  
  Check the processing solution temperature
6.

In taking the radiograph you did not center the beam on the film in the patient mouth. the resulting film will show
- A.
  
  Fogging
- B.
  
  Overlapping
- C.
  
  Elongation
- D.
  
  Collimator cutoof cone cutting
- E.
  
  Foreshortening
7.

The dental x ray machine in your office operates at 90kvp and thus is required to have a total filtration of
- A.
  
  2.75 inches of aluminum
- B.
  
  2.5 inches of aluminum
- C.
  
  2.0 mm of aluminum
- D.
  
  2.5mm of aluminum
- E.
  
  1.5 mm of aluminum
8.

The radiation inspector comes to your office and tells you that your x ray beam has an hvl of 1.00mm of aluminum you should
- A.
  
  Feel assured theat the beam mets the recommended standards
- B.
  
  Be concerned becaused of the unnecessary seconday radiation to your patients
- C.
  
  Be concerned because the beam is too penetrating
- D.
  
  Add more filtration
- E.
  
  Use a different pid