Test 6

CR has both indirect and direct systems

The PSP is painted onto the SPS

[blank_start]Europium[blank_end]: Keeps the electrons out of the holes [blank_start]Fluorohalide[blank_end]: Holds the electrons and keeps them from going back into the hole

When electrons drop back into the "holes," they release energy in the form of light

The PSP can only keep the electrons out of the "holes" for what amount before its lost

3 components to a CR reader 1st component: [blank_start]motor/transport system[blank_end] 2nd component: [blank_start]optical system[blank_end] 3rd component: [blank_start]computer system[blank_end]

When does the SPS get scanned?

[blank_start]1[blank_end]. Scans SPS with laser [blank_start]8[blank_end]. Channels to ADC [blank_start]2[blank_end]. Light is released from phosphor [blank_start]6[blank_end]. PMT or CCD changes light to electrons [blank_start]4[blank_end]. Filter takes out any laser light [blank_start]3[blank_end]. Optical instrument detects reflected light [blank_start]7[blank_end]. Light detected and converted to electrical signals [blank_start]5[blank_end]. Sends to photodetector

Forming and buffering of an image happens during what component?

The more bits/pixel, the better the system can produce an image

The [blank_start]lower[blank_end] the exposure, the higher the image noise

Low kVp gives a [blank_start]wide[blank_end] histogram and a high kVp gives a [blank_start]narrow[blank_end] histogram

CR and DR favor what type of exposure?

[blank_start]Direct[blank_end]: x-ray --> electrical signal [blank_start]Indirect[blank_end]: x-ray --> light --> electrical signal

Amorphous-Selenium (a-Se) is a phosphor

[blank_start]Indirect[blank_end]: a-Si (amorphous-Silicon) [blank_start]Direct[blank_end]: a-Se (amorphous-Selenium)

What part of the TFT will break if dropped?

DR indirect system has both CCD/EMCCD and CMOS

[blank_start]Photodiode[blank_end]: Photodetector which turns light into electrons; moves electrons in one direction [blank_start]Monochromatic[blank_end]: Having one color [blank_start]Optical filter[blank_end]: Device that only lets certain light frequencies through [blank_start]Fiber optics[blank_end]: Filaments or strands of material that conduct light [blank_start]Tomosynthesis[blank_end]: Radiographic tomography with digital imaging capability

A specialized tube is needed for digital fluoroscopy

During pulse progressive, the longer the beam stays on, the [blank_start]longer[blank_end] the beams stays off

[blank_start]Interrogation time[blank_end]: The time it takes the generator to get up to the mA and kVp setting [blank_start]Extinction time[blank_end]: The time it takes to turn everything off

What is the simplest form of subtraction?

Which of the following uses mask mode subtraction?

Which type of subtraction used time interval difference (TID)

Which of the following is CM images stacked and then subtracted?

Recursive filtering is [blank_start]matched filtering[blank_end] and [blank_start]TID[blank_end] combined

Hybrid subtraction is a combination of [blank_start]temporal[blank_end] and [blank_start]dual energy[blank_end] techniques