Exam 3 Digital Imaging Flashcards
Data expressed in continuous form: example: painting, traditional radiograph, photographs
Analog
Data expressed in discrete form and structurally ordered areas pixels example digital photograph, mosaic
Digital
Tiny storage dots that compose a digital image
Pixels
The number and size of pixels within
an image
Spatial Resolution
greater spatial resolution
sharper and clearer image
More pixels in an image
Spatial resolution depends on __ ___
matrix size
PSP (Photostimulable
Storage Phosphor)
InDirect system
CCD (Charged Coupling
Device
Direct system
Composition
• Sensor that contains a silicon chip with an electronic
circuit embedded on it
• Silicon chip is sensitive to x-rays or light
• Visualized as a grid of pixels or “wells” where electrons
are stored after exposure
• Equivalent to silver halide crystals on traditional film
Charged couple device
Indirect Digital system equipment needed
- Phopshor photostimulation
- laser scanner
- Digital interface card
- Computer
- software
• Cone Beam Computed tomography (CBCT) most useful assessment • 3D CT scan also available for analysis of bone and oral cavity for proper placement of implant • 1:1 ratio (life size)
best for
implant imaging
• Tomographic image • One plane selected • Commonly used by orthodontists • Uses: • Evaluation/prediction of skull growth • Trauma • Developmental abnormalities
Lateral Cephalometric
Reveals bony detail of the TMJ • Evaluation of TMJ dysfunction • Various views attained for
evaluation
TMJ tomographic
• Tomographic method of dental
imaging • X-ray beam directed down across
the top of the temporal bone to
the head of the condyle on the
opposite side of the skull • Single plane image • Aids in diagnosis of:
• Lesions • Fractures • Tissue changes
Tr anscranial (TMJ projection)
- Cross sectional images • No radiation exposure to patient • Common uses in dentistry include evaluation of:
- TMJ soft tissues
- Pathologic conditions
Ma gnetic Resonance Imaging (MRI)
