Radiology Best Answer

87 Questions  I  By Yarilsa on August 7, 2010

  
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1.  The penetrating power of xrays depend on
A.
B.
C.
D.
2.  The size of the collimated beam for intraoral radiology measured at the patient skin is
A.
B.
C.
D.
3.  Filtration of the xray beam protects the patient by
A.
B.
C.
D.
4.  The most penetrating xrays have
A.
B.
C.
D.
E.
5.  The x ray which is at the center of the primary beam is called the
A.
B.
C.
D.
6.  The housing of the xray tube is
A.
B.
C.
D.
7.  As the target film distance is increased there is
A.
B.
C.
D.
8.  Overlapping is a result of
A.
B.
C.
D.
9.  After a film is exposed, the target film distance is doubled. the exposure time necessary to obtain a second film of equal density to the first film is
A.
B.
C.
D.
10.  Wich cells are the most sensitive to xrays?
A.
B.
C.
D.
11.  Which cells are the least sensitive to x rays?
A.
B.
C.
D.
12.  The first sign of x ray dermatitis is
A.
B.
C.
D.
13.  Scatter radiation is a type of
A.
B.
C.
D.
14.  The lead foil in the xray film packet is used to
A.
B.
C.
D.
15.  The quality or penetrating power of secondary radiation is
A.
B.
C.
D.
16.  If a radiograph remains in the developing solution too long the film will be
A.
B.
C.
D.
17.  Film fog may occur if there is
A.
B.
C.
D.
18.  Films not fixed for a long enough period of time will appear
A.
B.
C.
D.
19.  Film is washed after removing it from the developing solution to
A.
B.
C.
D.
20.  In order for the developing chemicals to work, the solution must be
A.
B.
C.
21.  Fixing the film
A.
B.
C.
D.
22.  The fixing solution is
A.
B.
C.
D.
23.  Reticulation is
A.
B.
C.
D.
24.  The optimum time temperature relationship for processing dental radiographs is
A.
B.
C.
D.
25.  The panoramic radiograph is not diagnostic for
A.
B.
C.
D.
26.  Bitewing radiographs are useful in helping to determine
A.
B.
C.
D.
27.  The radiograph film is covered with an emulsion of
A.
B.
C.
D.
28.  The raised button on the radiogph aids in
A.
B.
C.
D.
29.  Film speed is determined by the
A.
B.
C.
D.
30.  The best technique for reducing the radiation exposure to both patient and operator is the use of
A.
B.
C.
D.
31.  The most radiolucent structure of a tooth is the
A.
B.
C.
D.
32.  The most radiopaque structure of the tooth is the
A.
B.
C.
D.
33.  To visualize the two roots on the maxillary first premolar the central ray should be directed.
A.
B.
C.
34.  The operator must avoid
A.
B.
C.
D.
35.  The chemicals used in processing solutions are dissolved in
A.
B.
C.
D.
36.  If an unexposed film is processed it will appear
A.
B.
C.
D.
37.  Secondary radiation emanates from the
A.
B.
C.
D.
38.  To avoid gonadal exposure to x ray which of the follwing may be used
A.
B.
C.
D.
39.  When radiographs are taken of a pregnant patient
A.
B.
C.
D.
40.  Who should hold the film in a patient's mouth if he or she is unable to do so
A.
B.
C.
D.
41.  When exposing a radiograph the operator should stand
A.
B.
C.
D.
42.  The maximum whole body dose cosidered permissible to those who work with radiation is
A.
B.
C.
D.
43.  The gratest danger to the operator is
A.
B.
C.
D.
44.  Which characteristic of xrays makes them both beneficial and hazardous?
A.
B.
C.
D.
45.  A technique used to measure the operator 's exposure to radiation is
A.
B.
C.
D.
46.  A constant source of radiation is
A.
B.
C.
D.
47.  The amount of radiation a person receives
A.
B.
C.
D.
48.  Maximum protection of the patient requires that the xray beam pass though a (n)
A.
B.
C.
D.
49.  Occlusal films are used to determine
A.
B.
C.
D.
50.  Small silver halide crystals on the film result in
A.
B.
C.
D.
E.
51.  Intensifying screems
A.
B.
C.
D.
52.  Which extraoral film is used to visualized the sinus?
A.
B.
C.
D.
53.  The principle used in panoramic radiography is
A.
B.
C.
D.
54.  The temperature of the radiographic processing solutions is adjusted by
A.
B.
C.
D.
55.  Which type of film cannot be used intraorally?
A.
B.
C.
D.
56.  Periapical film
A.
B.
C.
D.
57.  The occlusal plane of the arch being radiographed should be
A.
B.
C.
D.
58.  The ala-tragus line is parallel to the floor when taking
A.
B.
C.
D.
59.  When using the bisecting the angle technique
A.
B.
C.
D.
E.
60.  When using the paralleling technique
A.
B.
C.
D.
61.  Film racks should be
A.
B.
C.
D.
62.  Light films will result from
A.
B.
C.
D.
E.
63.  Dark films will result from
A.
B.
C.
D.
E.
64.  Film placement of the film will help prevent
A.
B.
C.
D.
65.  Periapical films should extend beond the occlusal plane
A.
B.
C.
D.
66.  If a film is exposed on the wrong side the result will be
A.
B.
C.
D.
67.  Xray are most effectively stopped by
A.
B.
C.
D.
68.  Blurred films may result from
A.
B.
C.
D.
69.  The usual number of films in a complete dentulous radiographic survey is
A.
B.
C.
D.
70.  In the paralleling technique a device which is used to hold the film in the patient's mouth is
A.
B.
C.
D.
71.  Elongation is caused by
A.
B.
C.
D.
1 comment
72.  Cone cutting results from the central ray
A.
B.
C.
D.
73.  Black lines across the film may be the result of
A.
B.
C.
D.
74.  Proper patient positioning for intraoral films requires the sagittal plane be
A.
B.
C.
D.
75.  If the sagittal plane of the patient 's head is positioned incorrectly the result may be
A.
B.
C.
D.
76.  Exposure time is determine by
A.
B.
C.
D.
E.
77.  When seating the patient the operator should
A.
B.
C.
D.
78.  Vertical angulation in the bisecting technique for the same radiograph may differ in patients due to
A.
B.
C.
D.
79.   a latent image is
A.
B.
C.
D.
80.  Exposure of a radiograph on a child
A.
B.
C.
D.
81.  Which of the following conditions cannot be identified radiographically?
A.
B.
C.
D.
E.
82.  The strength of the safelight permitted in the darkroom depends on the
A.
B.
C.
D.
83.  Extraoral films are
A.
B.
C.
D.
84.  How often should the processing solutions be changed
A.
B.
C.
D.
85.  The thermometer used to measure the temperature of the processing solutions is located
A.
B.
C.
D.
86.  The best way to dry processed films is to
A.
B.
C.
D.
87.  Extraoral films are placed in rigid frames called
A.
B.
C.
D.
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