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Building a Digital Image - Part I

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from acquisition to display

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Building a Digital Image - Part I
 

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Building a Digital Image - Part IOnline version

from acquisition to display

by Natalie Leal
1

X - ray photons interact with the in the imaging plate , where electrons are trapped , forming a .

2

A laser scans the imaging plate in the reader , releasing trapped electrons as , which represents the latent image .

3

The light is sent to a where it is amplified and converted into an electrical signal .

4

X - rays strike a ( n ) , which converts x - ray energy into visible light .

5

Light photons are absorbed by photodetectors ( such as ) , converting the light into electrical charge .

6

The stored charge is released by the , which acts like a switch for each .

7

X - rays strike the layer , which directly converts x - ray energy into electrical charge .

8

The electrical charge is collected in a within each detector element ( DEL ) . The thin - film transistor ( TFT ) releases the stored charge from each detector in sequence for readout .

9

The is digitized by the ADC , converting it into numeric .

10

The digital values are organized into a of rows and column s

11

A histogram graph is created , showing the of pixel values ( y axis ) by pixel values / pixel brightness levels ( x axis ) . Peaks and valleys reflect .

12

The LUT assigns displayed brightness values to numeric pixel values so the image appears with appropriate and for the selected body part and projection .

13

The processed image appears on the for evaluation .

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