Chapter 25 And 29 In Radiography Flashcards
What word is used to describe the pictures that are produced in digital imaging
IMAGE not radiograph or X-ray
Digital imagining
A computerized imagining system used to record radiographic images that requires NO film or processing . Instead the digital imaging uses an electronic sensor that produces radiographs almost instantly on a computer.
Exposure time for digital imaging
Are 50 to 90 % less than those required for conventional radiographs
Most digital imagining systems use a ? As the x radiation source
Conventional dental x ray unit
The CMOS detector is
Silicon based and differs from the CCD detector in the way that the pixels are read.
The human eye can only perceive
32 shades of gray
The essential components for a direct digital imaging system include
An X-ray machine,intra oral sensor , and computer monitor. A sensor with a fibrotic cable is linked jot the cable monitor andlaced in the mouth of the patient.
A primary advantage of digital imaging
The superior gray scale resolution that results
Digital imaging used ? Shades of gray
256 ( over 16,000 depending on the manufacturer
Advantages of digital imaging
Superior gray scale
Reduced exsposure to x radiation
Increased speed of image viewing
Disadvantages of digital imaging
Infection control
Legal issues
Mastoid process
A marked prominence of bone located. Posterior and inferior to the temporomandibular joint, TMJ
External auditory meatus ( extra oral acoustic meatus)
Is a hole or opening in the temporal bone located superior and anterior to the mastoid process.
Articular eminence
Appears as a rounded radiopague projection of the bone located antierior to the glenoid fossa.
Pterygomaxillary fissure
Description. A narrow space or cleft that separates the lateral pterygoid plate and the maxilla.
Maxillary tuberosity
Appearance appears as a radioplaque bulge distal to the third molar region
Orbit
Appearance a rounded radiolucent compartment with radioplaque borders located superior to the maxillary sinuses. Ok most panoramic images only the inferior border of the orbit is visible.where it appears as a radioplaque line
Nasal cavity
Also known as the nasal Fossa is pear shaped.
Zygomatic process of maxilla
Appearance appears as J or U shaped radiopacity located superior to the maxillary first molar region.
Hamulus
Description a small, hooklike projection of bone that extends from the medial pterygoid plate of the sphenoid bone.
Coronoid process
Description a marked prominence of bone found on the anterior superior ramus of the mandible.
Lingual foremen
Description a tiny opening or hole located on the internal surface of the mandible near the middline
Ear
Superimposed over the styloid process
