RHS Packet 1 Flashcards
(48 cards)
When taking a panoramic radiograph of an obese patient, as compared to a slim patient, exposure (kVp or mA) should…
be increased
The major disadvantage of the bisecting angle technique is that…
image distortion is more likely
To reduce cross- contamination during radiography the CDC and ADA recommend that the operators do all of the following EXCEPT:
a) dispose of saliva-contaminated film packets carefully
b) wear gloves
c) take complete medical histories
d) use sterilizable or disposable film holders
e) cover control unit and tubehead with plastic barrier
c) take complete medical histories
Ideally, a lead apron would be used…
for any dental radiographs
A full mouth radiographic series has just been processed manually. The operator notes that the films on the bottom of the rack are of a different density. What could have caused this?
a) developing solution was too cold
b) developing solution was contaminated
c) fixer solution was reaching exhaustion
d) solutions were not stirred before processing
d) solutions were not stirred before processing
A film that has been exposed to SCATTERED radiation will appear…
fogged
X-ray exposure time should be increased if the patient is:
a) very old
b) a large adult
c) endentulous
d) very young
b) a large adult
Before exposing panoramic radiograph on a patient, the operator should request the removal of all of the following EXCEPT:
a) watch
b) dentures
c) eyeglasses
d) removable bridgework
e) earrings
a) watch
A parent refuses to have radiographs taken on his/her child. The dental assistant should…
inform the dentist and document parent’s refusal
Incorrect horizontal angulation of the primary beam produces…
overlapping of proximal surfaces
Where is the radiographic landmark ‘incisive foramen’ usually located?
maxillary anterior
Cephalometric radiographs are PRIMARILY indicated to evaluate…
jaw relationships
When taking a panoramic radiograph, the patient’s head should be oriented:
a) w chin tipped down
b) w chin tipped up
c) with the midsagittal plane perpendicular to the floor
d) so that it is rotated towards the film
c) with the midsaggital plane perpendicular to the floor
Which of the following is MOST likely to contribute to fogging of xray film?
a) defective safelight
b) chemical contamination
c) high temperature storage
d) light leaks in the darkroom
d) light leaks in the darkroom
Which of the following conditions will result in a radiographic image that is too light?
a) darkroom door opened during development
b) processing solutions too warm
c) weak developing solution
d) inadequate safelight
c) weak developing solution
The purpose for using film-holding devices when taking intra-oral radiographs is to…
assist in correct film placement
A film with thin density and herringbone (zigzag) pattern across it is the result of…
film packet reversal
A full mouth radiographic survey has just been processed manually. The top films on the processing rack have a straight, clear border on the upper edge. This error is caused by…
too low a level of developer solution
Using a faster speed film requires…
a shorter exposure time
The life expectancy of radiographic processing solution depends on all EXCEPT:
a) number of films processed
b) solution exposure to air
c) solution contamination
d) temperature of the solution
d) temperature of the solution
Insufficient washing of processed radiographic film will result in…
brownish-yellow stain on the radiograph
What is the major advantage in using the highest speed film and higher kVp?
reduces the radiation to the patient
The BEST way to correct a conecutting error is to
center position indicating device PID (cone)
If all known radiation safety precautions are exercised, an operator who is pregnant can safely expose radiographs during the operator’s…
entire pregnancy
