safety
What type of radiation is produced below 70 kVp?
100% bremsstrahlung radiation
What is the smallest bit of electromagnetic energy called?
a photon/quantum
Energy of electromagnetic radiation is_________to frequency, and__________ to wavelength?
1. directly proportional to frequency
2. inversely proportional to wavelength
wavelength and energy are __________ proportional?
inversely proportional.
what is the purpose of filtration of the x-ray beam?
removes low energy, non-diagnostic x-ray photons from the primary beam.
what type of radiation is produced above 70 kVp?
Characteristic Radiation.
What is frequency?
the rate of rise and fall (oscillation of the electromagnetic photon, measured in Hertz (Hz).
What is the speed of light?
3 x 108 Meters/second (186,000 miles/sec)
frequency and energy are _________ proportional?
directly proportional.
what is the effect of increased filtration?
increased x-ray beam quality but does not change peak energy.
Which characteristic x-rays are able to penetrate the body, and are diagnostically useful?
K-shell characteristic x-rays.
What is Wavelength?
the distance between two successive peaks of an electromagnetic photon.
what is the conversion between inches and cm?
1 inch= 2.5cm
what does x-ray beam quality refer to?
1. kVp
2. the penetrability of the x-ray beam
what is the main difference between x-radiation and gamma radiation?
the source of origin.
What happens after ionization creates an inner-shell vacancy?
outer-shell electron drops down to "fill the void"
What is the relationship between frequency and wavelength?
1. they are inversely related.
EX: x-radiation has very high frequencies, and very short wavelength.
what is true about everything on the electromagnetic spectrum?
1. it travels at a constant velocity.
2. moves at the speed of light
what influences x-ray beam quality?
kVp (kilovoltage peak).
How does one convert inches to cm, and cm to inches?
1. Inches to cm= multiply by 2.54
2. cm to inches= divide by 2.54
What type of energy is X-radiation?
a form of electromagnetic energy on the electromagnetic spectrum.
What happens to wavelength when frequency increases?
the wavelength decreases.
Wavelength and frequency are _______proportional?
inversely proportional
what happens when kVp increases?
increases x-ray quality and penetrability.
what does x-ray quantity (mAs) represent?
expresses the intensity or amount of x-rays in the beam.