MEDICINE
RADIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
elongation.
|
|
|
overlapping
|
|
|
cone-cutting.
|
|
|
foreshortening.
|
Detailed explanation-1: -Foreshortening or shortening of the teeth and the surrounding structures can also result from improper vertical angulation. Foreshortening is the result of overangulation of the x-ray beam (too much vertical angle).
Detailed explanation-2: -Beam Alignment The vertical angle, however, must be directed at 90o to the imaginary bisecting line. Too much vertical angulation will produce images that are foreshortened. Too little vertical angulation will result in images that are elongated. The beam must be centered to avoid cone cutting.
Detailed explanation-3: -Elongation is caused by excessive vertical angulation. Foreshortened images can be corrected by decreasing vertical angulation.
Detailed explanation-4: -Vertical angulation. Refers to the positioning of the PID in a vertical, or up-and-down, plane. Beam alignment device. A device used to position an intraoral receptor in the mouth and maintain the receptor in position during the radiographic procedure.