Dental Imaging Techniques Flashcards
Who discovered x-ray? what year?
W.C Roentgen in 1895
Who took the first dental radiography? what year?
O. Walkhoff 1896
Who took the first dental radiograph in the skull what year?
W.J morton 1896
First dental radiograph on living patient
C.E Kells 1896
first feamle assistant, died due to severe exposure
- radiographic image produced by conventional film.
- Images are produced when x-ray photons strike an intraoral film.
Analog Image
A filmless imaging system; a method of capturing a radiographic image using a sensor, breaking it into electronic pieces, and presenting and storing the image using a computer.
Digital Image
Steps of digital image capture
- Sensor inside mouth
- X-ray beam to strike sensor
- Electronic charge produced on sensor, signal digitized and converted to digital from
Data acquired by the sensor are communicated to the computer in analog form and are then **converted into digital form **by the use of an
Analog to digital converter ADC
Two forms of solid state technology
- Intraoral snesory
- CCD & CMOS
is a small detector that is placed intraorally to capture the radiographic image.
Intraoral sensor
Solid State technology
What are 0-4 sizes of sensory capture?
- Child PA, BW
- Adult Ant PA
- Adult PA, BW, child occlusal
- Extralong BW
- Occlusal on adults
collect the charge generated by x-rays in a solid semiconducting material
Solid sate technology
Both forms of intraoral sensors CCD and CMOS do what?
convert light signal (photons, including x-ray photons) into electrical signal.
Silicon chip with an electronic circuit emnbedded in it, covert light into electrical signal (electron hole pairs). latent image is then transmitted and stored in a computer and can be converted to a visible image on screen or printed on paper.
Charge-coupled device (CCD)
info transmited from adjacent cells
silicon-based, basis for typical digital cameras
Each pixel is isolated from its neighboring pixels and is directly connected to a transistor.
Complementary Metal Oxide Semiconductor (CMOS)
