CR And The CR Reader

Question 1

Film base or base layer

Answer 1

• foundation of film

- emulsion is fragile, need this base so that film can be handled and processed

Question 2

Emulsion

Answer 2

• radiation sensitive and light-sensitive layer

- x-ray has film emulsion on both sides-duplitized

Question 3

Adhesive layer/ substratum

Answer 3

• between the emulsion and base layer

- holds the layers together, essentially the “glue” that holds the film together

Question 4

Latent image formation

Answer 4

• the image that exists on the film after the exposure, but before processing
• film processing changes it into a visible image

Question 5

Intensifying screens

Answer 5

• device found in cassettes containing phosphors that convert x-rays into light (light then exposes the radiographic film)
• decrease pt dose (less mAs required compared to non screen film)
• phosphor layer, active layer that converts x-rays into light
• reflective layer: redirects light towards the film to enhance efficiency
• pros: less dose to pt, shorter exposure times
• cons: recorded detail on image, increased blur

Question 6

Digital radiography

Answer 6

DR
-detector based system
-cassette-less
CR
-CR cassettes
-PSP (photostimulable phosphor)

Question 7

Digital radiography

Answer 7

• DR (direct radiography) system utilizes detectors that directly capture and read out the electronic image signal
• CR (computed radiography) uses phosphors within a cassette