What element am I?
I am a photoconductor found in direct capture digital radiography
What is amorphous selenium
I am a preprocessing function that adjusts image brightness for over and underexposures
What is automatic rescaling
What are dead pixels
The ability to visualize and distinguish between small structures in a radiographic image
What is spatial resolution
Electronic component that samples and quantizes an analog signal and converts it into binary data
What is an ADC (analog to digital convertor)
I am a hygroscopic element that converts x-ray energy to light photons in indirect capture digital radiography
What is cesium iodide
I am created from S(ave) and represent the exposure that reached the IR
What is the exposure indicator (EI) number
Any undesirable fluctuation in image brightness and visibility
Increasing the FOV but maintaining the matrix size will ____ spatial resolution
What is decrease (because pixel size will increase)
What is DQE (detective quantum efficiency)
I am a photodetector found in indirect FPD-TFT capture IRs.
What is amorphous silicon
I measure exposure in air based on field size - where am I located?
What is inside the collimator
Shadows of electronic components in an image caused by remnant photons reflecting back during high exposures
The most accurate measure of a system's ability to display contrast of objects of varying size
What is MTF (modulation transfer function)
This algorithm maps compares VOIs captured to stored grayscale values of the same procedure and primarily controls contrast in digital imaging
What is an LUT (look up table)
I am a scintillator that might be found in an indirect FPD-TFT type IR, but I allow the light to spread too much
What is gadolinium oxisulfide
The range of exposure intensities an IR can capture and use to form a quality image
What is dynamic range
Areas of anatomy that are grayed or blacked out due to overexposure
What is saturation
What is FOV (in mm) divided by matrix size
This element of a capture device found in IRs stores and transmits charges for orderly readout
What is a TFT (thin film transistor)
I am the photodetecting element used in indirect DR CMOS capture devices
What is crystalline silicon
The measurement of exposure in air that reflects patient skin exposure and volume of tissue irradiated is called
What is DAP (dose area product)
Striped appearance over an image due to sampling or grid errors
What is aliasing or the Moire effect
The highest spatial frequency that an IR can capture without distortion
What is Nyquist frequency
This type of device found in an IR captures light, converts it into analog signal and digital signal without a separate ADC.
What is CMOS (complementary metal oxide semiconductor)