Lra 222: Course Examination

LRA 222: COURSE EXAMINATION


1. Film and intensifying screens are primarily used in

A. computed radiography (CR)

B. digital radiography (DR)

C. conventional radiography

D. picture archival and communication systems - answers✔✔C. conventional radiography



2. CR acquires an image through

A. conventional film/screen processing using a digital scanner

B. the heating of a thermoluminescent device

C. an electrically charged cassette

D. the use of a storage phosphor plate - answers✔✔D. the use of a storage phosphor plate



3. Technologist efficiency ratings are generally the same when comparing conventional
radiography with ______ radiography

A. computed

B. digital - answers✔✔A. computed



4. The active element in a storage phosphor is

A. lithium

B. glutaraldehyde

C. europium

D. barium fluorohalide - answers✔✔D. barium fluorohalide

, 5. In reference to PSP image capture, to release the latent image, which of the following devices
is scanned over the phosphor plate?

A. Photomultiplier tube

B. Fluorescent light

C. Focused laser light

D. Lithium crystal - answers✔✔C. Focused laser light



6. X-ray energy related to direct capture DR will stimulate a ______, which eventually is changed
into an electrical signal

A. photodensitometer

B. scintillator

C. TFT array

D. charge-coupled device - answers✔✔B. scintillator



7. The ______ converts x-ray energy directly to a digital electrical signal

A. photoconductor

B. photomultiplier

C. scintillator

D. TLD - answers✔✔A. photoconductor



8. Exposure latitude is to conventional radiography as _______ is to DR

A. characteristic response

B. linear manner

C. subject contrast

D. dynamic range - answers✔✔D. dynamic range



9. A look-up table maps