ch. 20
There are 2 types of digital radiography systems. Name them:
What is computed radiography (CR) & digital radiography (DR).
What is ASAP?
_________ is the active layer used in a direct conversion system?
What is Amorphous Selenium?
Digital imaging latitude is __________ compared to film-screen?
What is wide?
There are 5 laws of electrostatics, name 2:
what is:
Repulsion
Inverse Square Law
Distribution
Concentration
Movement
When a signal is converted from analog to a digital language, what component is used?
What is a ADC?
Pixel pitch & size have a ________ relationship to spatial resolution?
What is inverse?
Which class of DR uses a scintillator?
What is indirect?
____________ is the range of exposure values that can be captured by an IR.
What is dynamic range?
What experiment led to the conclusion that a charge in motion will create a magnetic field?
What is Oersteds Experiment?
The detection & measurement of the intensity of the electronic signal coming from each pixel?
What is sampling?
_______ controls the bit depth.
What is ADC?
There are 2 types of scintillators, which is preferred?
What is Cesium Iodide?
_____________ is the technical factor that control the amount of scatter produced in DR?
What is mAs?
Most DIAGNOSTIC target angles (of the anode) are __________ degrees?
What is 12 degrees?
In regards to window width & level, which controls BRIGHTNESS?
What is window level?
The _________ layer (of the PSP) grounds the plate & absorbs light?
What is conductor layer?
In direct detectors, what material is used as a photoconductor?
What is Amorphous Selenium?
There are several correction methods in data dropping, name 2:
What is:
post-processing & pixel recovery
tissue bolusing
collimation
compensating filtration
What is the unit of measurement for x-ray quantity?
What is roentgen (R)?
Is applied to data to give the standard contrast?
What is Look-Up-Table (LUT)?
__________ allowed CR to become commercially & widely available?
What is Fuji Medical Systems?
A __________ fill factor yields higher spatial & contrast resolution?
What is higher?
Regarding technique systems, which system is best used for digital receptors?
What is Fixed kVp systems?
Name the Inverse Square Law formula?
what is:
I1 (D2)2
___ = _____
I2 (D1)2