Digital Carter Chapter 6

Front 1

Cesium Iodide (CsI) Scintillator

Back 1

newer type of amorphous silicon detector that uses cesium iodide (CsI) scintillator, the scintillator is made by growing very thin crystalline needles (5 um) wide, that work as light directing tubes, much like fiber optics

Front 2

Charge-coupled devices (CCD's)

Back 2

coupling devices that act as cameras that link phosphor signals to a signal

Front 3

Complementary Metal Oxide Silicon (CMOS)

Back 3

special type of memory chip that uses a small rechargeable or lithium battery to reatin information about the PC's hardware while the computer is turned off.

Front 4

Detective Quantum efficiency (DQE)

Back 4

measurement of how efficiently a system converts x-ray input signal into a useful output image.

Front 5

Detector Size

Back 5

actual physical size, lenght and width of the x-ray detector

Front 6

Direct Conversion

Back 6

conversion of x-ray energy to the electrical signals without the light-conversion step

Front 7

Electronic Memory Artifact

Back 7

artifact film not properly erased?

Front 8

Field Effect Transistor (FET)

Back 8

device within an imaging detector that isolates each pixel element and reacts like a switch to send the electrical charges to the image processor.

Front 9

Flat-panel Detector

Back 9

detector that consists of a photo conductor, which holds a charge on its surface that can then be read out by a thin-film transistor.

Front 10

Indirect Conversion

Back 10

two-step process in which xray photons are converted to light and then the light photons are converted to an electrical signal

Front 11

Rare-earth scintillator

Back 11

terbium-doped gadolinium dioxide sulfide

Front 12

Thin-film transistor (TFT)

Back 12

photosensitive array, made up of small, (about 100 - 200 um) pixels, converts light into electrical charges