CR vs DR

Question 1

What are the layers of the PSP plate

Answer 1

1. Protective Layer
2. Phosphor Layer
3. Reflective Layer
4. Conductive Layer
5. Support Layer (color layer and soft backing layer)

Question 2

What layer protects the active phopshor layer

Answer 2

Protective layer

Question 3

What makes up 85% of the phosphor layer

Answer 3

Barium fluorohalide

Question 4

What makes up 15% of the phosphor layer

Answer 4

Europium activator

Question 5

What layer reflects the light and prevents unwanted light from exposing the image

Answer 5

Reflective layer

Question 6

What layer grounds the imaging plate from electrostatic charges

Answer 6

Conductive layer

Question 7

What is a digtizer used for

Answer 7

To release the stored latent image and covert it to a digital image for display

Question 8

In CR - After rollers extract the imaging plate from the protective housing, what type of laser is used to read the image

Answer 8

Helium neon laser

Question 9

What type of pattern does the helium neon laser read the image

Answer 9

Raster pattern

Question 10

In CR - What happens to the stored energy in the phosphor plate when hit by the laser

Answer 10

Energy is released in the form of light photons

Question 11

In CR - What collects the light photons once released from the phosphor plate

Answer 11

PMT - photo-multiplier tube

or Charge Coupled Device

Question 12

In CR - After the light photons are collected and amplified, they are sent to the:

Answer 12

ADC - analog to digital converter

Question 13

In CR - What is used to erase latent image

Answer 13

Fluorescent lights

Question 14

2 types of digital radiography

Answer 14

Direct
Indirect

Question 15

How does DR (indirect) convert xrays to an image

Answer 15

Xrays to light to electrical charge

Question 16

What are the two forms of DR Indirect capture

Answer 16

CCD or
TFT

Question 17

What is the scintilator used in CCD

Answer 17

Cesium iodide

Question 18

What is a scintilator used for

Answer 18

Absorbs xrays and emits visible light in response

Question 19

What is the photodiode used in DR (indirect capture)

Answer 19

Amorphous Silicon

Question 20

What is the function of the photodiode in DR (indirect)

Answer 20

Converts light photons into electrical charge

Question 21

What is the function of the TFT in DR (indirect)

Answer 21

Stores electric charge and converts to digital signal

Question 22

What is the difference between DR indirect and direct?

Answer 22

Indirect coverts xrays to light

Question 23

What is the semiconductor layer in DR (direct)

Answer 23

Amorphous Selenium