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Ch 42 extraoral xray

extraoral and digital radiography

QuestionAnswer
special device that allows the operator to easily position both film and patient cephalostat
image receptor found in the intraoral sensor charge coupled device
filmless imaging system tha uses a sensor to caputre images, then coverts the images into electronic pieces and stores them in a computer digital radiography
an image composed of pixels digital image
to convert an image into a digital form that it turn can be processed by a computer digitize
a technique in which the image is captured on an intraoral sensor and then is viewed on a computer monitor direct digital imaging
feature that allows the operator to adjust the milliamperage and kilovoltage settings exposure controls
rediographs taken when large areas of the skull or jaw must be examined extraoral radiographs
imaginary three dimensional horse shoue shaped zone used to focus panoramic radiographs focal trough
imaginary plane that passes through the top of the ear canal and the bottom of the eye socket frankfort plane
an existing radiograph is scanned and converted into a digital form with the use of a charge coupled device camera indirect digital imaging
imaginary line that divides the patients face into right and left sides midsaggital plane
small detector that is placed intraorally to caputre a radiographic image sensor
technique in which a digital image is caputred on phosphor coated plates and then is placed into an electronic processor where a laser scans the plate and produces an image on a computer screen storage phosphor imaging
joint on each side of teh head that allows movement of the mandible temporomandibular
radiographic technique that allows imaging of one layer or section fo the body while blurring images from structures in other planes tomography
when are extraoral radiographs taken when large areas of teh skull or jaw must be examined or when patients are unable to open their mouths for film placement
Panoramic radiographs allow the dentist to view the entire dentition and related structures on a single film
the images on a panoramic film are not as well defined or clear as the images on intraoral films therefore __________ are used to supplement a panoramic film to detect________ bitewing films, dental caries or periapical lesions
panoramic radiographs are used to: locate impacted teeth, observe tooth eruption patterns, detect lesions in the jaw, detect features in the bone, provide an overall view of the mandible and maxilla
panoramic radiographs are not used for substitute for intraoral films, diagnose dental caries, diagnose periodontal disease, diagnose periapical lesions
when taking a panoramic radiograph what supplies are used panoramic xray unit, screen type film, intensifying screens and cassettes
if you do not remove all removable metal objects from the facial area you can get what kind of image on your panoramic radiograph ghost images
if the patients lips are not closed during a panoramic radiograph the result is a dark radioluent shadow that abscures the anterior teeth
where should the patient postition the tongue during a panoramic radiograph in contact with the palate
if the tongue is not properly placed during a panoramic radiograph what is the result a dark radiolucent shadow that obscures the apices of teh maxillary teeth
if the patient is positioned with the chin too high when taking a panoramic radiograph the result will be a reverse smile line
if the patient is positioned with the chin too low when taking a panoramic radiograph the result is an exaggerated smile line will be apparent
if the patients anterior teeth are positioned to far back on the bite block what is the result the anterior teeth appear too fat
if the patients anterior teeth are not positioned in the groove on the bite block and are too far forward the teeth appear to skinny and out of focus
if the patient is not standing or sitting with a straight spine what is the result the cervical spine appears as a radiopacity in the center of the film
Created by: cynthia.fryer on 2011-12-08



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