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5.Indirect conversion in flat-panel detectors is a ______-step process.

a.

One

b.

Two

c.

Three

d.

Four

ANS:BOBJ:Differentiate between direct and indirect image capture.

TOP:Indirect conversion

6.The type of flat-panel detector that uses thin films of silicon integrated with arrays of photodiodes is known as a ______.

a.

CsI detector

b.

Charge-coupled device

c.

CMOS

d.

Amorphous silicon detector

ANS:DOBJ:Differentiate between direct and indirect image capture.

TOP:Indirect conversion

7.Cesium iodide detectors use ______.

a.

Rare-earth scintillators

b.

Thin crystalline needles

c.

Miniature cameras

d.

Specialized pixel sensors

ANS:BOBJ:Differentiate between direct and indirect image capture.

TOP:Indirect conversion

8.In cesium iodide detectors, ______.

a.

There is a great deal of light spread

b.

Crystalline needles block light from the detector

c.

Light hitting the photodiode reduces the charge

d.

Light spread causes resolution to decrease

ANS:COBJ:Differentiate between direct and indirect image capture.

TOP:Indirect conversion | CsI detectors

9.A device that acts like a camera in an indirect conversion detector is known as a ______.

a.

Charge-coupled device

b.

Field-effect transistor

c.

CMOS

d.

Thin-field transistor

ANS:AOBJ:Discuss the function of a charge-coupled device.

TOP:CCD - Charge-coupled device

10.A detector in which each pixel has its own amplifier is known as a ______.

a.

Charge-coupled device

b.

Field-effect transistor

c.

CMOS

Copyright © 2008 by Mosby, Inc. an affiliate of Elsevier Inc.

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