X-ray Production
Approximately what percentage of electron energy becomes x-rays?
What is less than 1%
The brightness of a digital image is primarily controlled by this factor
What is rescaling/processing
Fluoroscopy provides imaging in this format.
What is real time?
The primary purpose of collimation is to reduce this.
What is scatter radiation?
Exposure indicator values consistently lower than expected suggest images may be this.
What is underexposed?
The majority of x-rays useful for imaging are produced by this interaction.
What is Bremsstrahlung radiation
The number of shades of gray displayed is controlled by this parameter.
What is window width?
This device converts x-rays into visible light and electronic signals.
What is an image intensifier?
Grids improve image contrast by absorbing this.
What is scatter radiation?
A damaged detector may produce this type of image artifact.
What is a line artifact or dead pixel artifact?
Characteristic radiation occurs when electrons interact with this electron shell
What is an inner shell electron
This parameter determines image brightness in display processing.
What is window level?
Pulsed fluoroscopy helps reduce this.
What is patient radiation dose?
The lead strips in a focused grid are angled toward this location.
What is the focal spot?
Failure of the rotor may prevent this anode movement.
What is rotation?
Increasing kVp increases both x-ray quantity and this beam property
What is beam quality (penetration)
Smaller pixel size generally results in improved ______ resolution.
What is spatial resolution?
The foot pedal primarily controls this during fluoroscopy.
What is x-ray production/exposure?
Increasing grid ratio improves contrast but requires more of this.
What is patient exposure (mAs)?
Regular calibration ensures equipment maintains this characteristic.
What is accuracy?
This layer of the x-ray tube housing absorbs low energy photons
What is filtration
Excessive exposure that is masked by image processing is known as this phenomenon.
What is dose creep?
Last-image hold improves efficiency while reducing this.
What is radiation exposure?
This error occurs when the wrong SID is used with a focused grid.
What is off-focus grid cutoff?
Consistent QA testing helps ensure compliance with these requirements.
What are regulatory standards?