X-ray Emission Spectrum Ch 8 Flashcards
What is the y axis?
Quantity
What is the x axis?
Quality
The total number of x-rays emitted is ______ to the area under the curve of the x-ray emission spectrum.
Equivalent
Factors that can change the size and shape of the emission spectrum curve are…
- mA or mAs
- kVp
- Added filtration
What factor does mAs control?
Quantity (y axis)
Added filtration will reduce beam intensity while _____ the average energy
Increasing
What happens to the curve when mA is adjusted?
Amplitude of the spectrum goes up or down
What happens to the curve when kVp is adjusted?
The amplitude and position is effected
What happens to the curve when filtration is added?
Amplitude goes down and curve leans slightly to the right
If the target atomic number is increased, what happens to the efficiency of x-ray production?
It is enhanced
What will be affected by the type of voltage waveform used?
Quantity and Quality
X-ray _______ is the number of x-rays in the useful beam.
Quantity
X-ray quantity is _______ to mAs.
Proportional
X-ray quantity is proportional to _____.
kVp2
X-ray quantity is _____ proportional to the square of the distance from the source.
Inversely
When SID is ______, mAs must be increased by SID2 to maintain constant exposure to the image receptor.
Increased
What does adding filtration to the useful x-ray beam reduce?
Patient dose
Penetrability is one description of the ability of an x-ray beam to pass through ______.
Tissue
Attenuation is the ______ in x-ray intensity that results from absorption and scattering
Reduction
What is the best method for specifying x-ray quality?
HVL
X-ray beam quality can be identified by ___ or filtration, but HVL is most appropriate.
kVp
Increasing kVp ______ the quality of an x-ray beam.
Increases
Increasing _____ increases the quality of an x-ray beam.
Filtration
Added filtration results in increased ____.
HVL
The term x-ray ______ is often used instead of x-ray intensity or x-ray quantity.
Exposure
X-ray beam hardening ______ the number of high energy x-rays in the beam by removing lower energy x-rays.
Increases
The penetrability of an x-ray beam is called…
Quality
A diagnostic x-ray beam usually has an HVL in the range of _____ mm AL or 3-6 cm of soft tissue.
3-5
What is a compensating filter?
Filter that compensates for differences in subject matter
