VTNE: Diagnostic Imaging
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Some examples of radiopaque objects
When can parallel technique be used in dental radiography?
Caudal mandibular teeth
If the x-ray beam is aimed at the tooth, how will the image be distorted?
If the x-ray beam is aimed at the film, how will the image be distorted?
How is the bisecting angle technique performed
Visualizing an imaginary line that bisects the angle of the film and the angle of the tooth. Aim the machine head so that the beam will be perpendicular to this imaginary line.
For what teeth is the extraoral technique used for in the cat? Why?
The caudal maxillary teeth. The zygomatic arch can obscure visualization of the roots of the third and fourth premolars.
How would the normal tooth of a young canine look radiographically?
thin dentin, large pulp chamber
How would the normal tooth of an adult canine look radiographically?
Thicker dentin, smaller pulp chamber
Silver halide crystals are the x-ray sensitive granules on the film. Fast films have _______ granules, but ______ detail.
- larger granules
- less detail
- better if movement is a factor
Smaller granules have more _______, but also need a ______ exposure time.
- longer exposure time
When should a grid be used?
when x-raying a body area greater than 10cm in thickness
the weakening of the sound waves as they pass through body structures.
What is the difference between a low and high frequency transducer on an ultrasound machine?
- high-greater resolution, increased attenuation, less penetration.
- low-deeper penetration, less resolution
An entire section of the upper and lower arcades do not interdigitate.
Central incisors of the upper and lower arcades are not aligned.
The most common feline oral neoplasia
- SCC (squamous cell carcinoma)
- * Fibrosarcoma is the next most common
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