Characteristics of a Digital Image-->Measuring spatial resolution
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-Since the spatial resolution refers to clarity, for different devices, different
terms are used to measure it.
Dots per inch = dpi is used in monitors
Lines per inch = lpi is used in laser printers
Pixel per inch = ppi is used to measure in different devices such as tablets,
Mobile phones etc.
Analog Image
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-Depicted by a continuous spectrum of gray shades between the extremes
of white and black
-Difficult to see where one shade ends and another begins
, -In digital imaging, the sensor receives this information and converts it to a
digital image in the computer processing unit
Direct Digital Imaging Receptors
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1. Wired = connected to the computer by fiber optic cable called CCD or
Charge-Coupled device
2. Wireless = needs a receiver to connect the image to the computer, called
CMOS or complementary metal oxide semiconductor
-Both convert x-rays into electronic signals that are sent to the computer
________ 9. A filmless imaging system; a method of capturing a radiographic image using
a sensor, breaking the image into electronic pieces, and presenting and storing the
image using a computer.
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digital radiography
Ip/mm
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line pairs per millimeter - sharpness or resolution of a radiographic image
, Storage Phosphor imaging
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Method of obtaining a digital image in which the image is recorded on
phosphor-coated plates and then placed into an electronic processor,
where a laser scans the plate and produces an image on a computer
screen.
Radiation Exposure
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-Digital imaging requires less x-radiation than does conventional
radiography.
-Less x-radiation is necessary to form a digital image on the sensor = typical
sensor is more sensitive to x-radiation than conventional film.
-Exposure times for digital imaging are 50% to 80% less than conventional
-Exposure time required for digital imaging is 3 impulses (3/60 or 0.05
second)
________ 19 Digital imaging was introduced to dentistry in:
a. 1967
b. 1977
c. 1987
d. 1997
Give this one a try later!
Give this one a try later!
-Since the spatial resolution refers to clarity, for different devices, different
terms are used to measure it.
Dots per inch = dpi is used in monitors
Lines per inch = lpi is used in laser printers
Pixel per inch = ppi is used to measure in different devices such as tablets,
Mobile phones etc.
Analog Image
Give this one a try later!
-Depicted by a continuous spectrum of gray shades between the extremes
of white and black
-Difficult to see where one shade ends and another begins
, -In digital imaging, the sensor receives this information and converts it to a
digital image in the computer processing unit
Direct Digital Imaging Receptors
Give this one a try later!
1. Wired = connected to the computer by fiber optic cable called CCD or
Charge-Coupled device
2. Wireless = needs a receiver to connect the image to the computer, called
CMOS or complementary metal oxide semiconductor
-Both convert x-rays into electronic signals that are sent to the computer
________ 9. A filmless imaging system; a method of capturing a radiographic image using
a sensor, breaking the image into electronic pieces, and presenting and storing the
image using a computer.
Give this one a try later!
digital radiography
Ip/mm
Give this one a try later!
line pairs per millimeter - sharpness or resolution of a radiographic image
, Storage Phosphor imaging
Give this one a try later!
Method of obtaining a digital image in which the image is recorded on
phosphor-coated plates and then placed into an electronic processor,
where a laser scans the plate and produces an image on a computer
screen.
Radiation Exposure
Give this one a try later!
-Digital imaging requires less x-radiation than does conventional
radiography.
-Less x-radiation is necessary to form a digital image on the sensor = typical
sensor is more sensitive to x-radiation than conventional film.
-Exposure times for digital imaging are 50% to 80% less than conventional
-Exposure time required for digital imaging is 3 impulses (3/60 or 0.05
second)
________ 19 Digital imaging was introduced to dentistry in:
a. 1967
b. 1977
c. 1987
d. 1997
Give this one a try later!
