Electromagnetic spectrum
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Velocity, no mass, bundles of energy
They differ in frequency and wavelength
Frequency and energy have directly proportional relationship
Factor Affecting Quantity: Filtration
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- Metal filters, usually aluminum (Al), 1-5mm
Attenuate the useful/primary beam
- Absorb the lowest energy photons
- These photons would be absorbed into the superficial tissues of the
patient
, - Higher the filtration, the greater the absorption
- If too much filtration, image contrast on film will be adversely affected
Examples of Electrification
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1.) Touching a metal doorknob after shuffling across a thick carpet (creates
a shock)
- You gained excess electrons from the carpet (electrification) and get rid
of them quickly via static discharge to the door
2.) Combing your hair briskly
- Hair static
- Comb is charged
Transmission
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Transparent window, full transmission
Radiotransparent
Series Circuit
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, - All circuit elements are connected in a line across the same conductor
Discrete Spectrum
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- Has specific values
- Used when describing characteristic radiation
- Characteristic XR emission spectrum for a tungsten target
- Only diagnostically useful ones are "K" XRs
- When combine with a Bremsstrahlung spectrum, k-shell
characteristic XRs are represented by one vertical line
Transformers
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Transforms or changes the intensity of altering voltage (and therefore
current)
- Used in XR to transform incoming voltage of 110V to 220V and then more
Nuclear energy
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Energy within a nucleus
, mAs Timers
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- Used in falling load and capacitor discharge systems
- Uses the highest mA station possible and thereby decreasing exposure
time
- Calculates mA X time and terminates exposure when desired mAs has
been reached
- Works by monitoring tube current and so is located on the secondary
side of the high voltage transformer
Discovery of x rays
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Wilhelm Roenqtgen November 8th, 1895
Working with a glass tube, exposed barium platinocyanide
The resulting glow was created by an X ray
Won the first Nobel Physics prize 1901
Step Up Transformer
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- Has more windings on the secondary coil
- It will increase the voltage from the primary coil, thus decreasing current
- Used in XRs
Give this one a try later!
Velocity, no mass, bundles of energy
They differ in frequency and wavelength
Frequency and energy have directly proportional relationship
Factor Affecting Quantity: Filtration
Give this one a try later!
- Metal filters, usually aluminum (Al), 1-5mm
Attenuate the useful/primary beam
- Absorb the lowest energy photons
- These photons would be absorbed into the superficial tissues of the
patient
, - Higher the filtration, the greater the absorption
- If too much filtration, image contrast on film will be adversely affected
Examples of Electrification
Give this one a try later!
1.) Touching a metal doorknob after shuffling across a thick carpet (creates
a shock)
- You gained excess electrons from the carpet (electrification) and get rid
of them quickly via static discharge to the door
2.) Combing your hair briskly
- Hair static
- Comb is charged
Transmission
Give this one a try later!
Transparent window, full transmission
Radiotransparent
Series Circuit
Give this one a try later!
, - All circuit elements are connected in a line across the same conductor
Discrete Spectrum
Give this one a try later!
- Has specific values
- Used when describing characteristic radiation
- Characteristic XR emission spectrum for a tungsten target
- Only diagnostically useful ones are "K" XRs
- When combine with a Bremsstrahlung spectrum, k-shell
characteristic XRs are represented by one vertical line
Transformers
Give this one a try later!
Transforms or changes the intensity of altering voltage (and therefore
current)
- Used in XR to transform incoming voltage of 110V to 220V and then more
Nuclear energy
Give this one a try later!
Energy within a nucleus
, mAs Timers
Give this one a try later!
- Used in falling load and capacitor discharge systems
- Uses the highest mA station possible and thereby decreasing exposure
time
- Calculates mA X time and terminates exposure when desired mAs has
been reached
- Works by monitoring tube current and so is located on the secondary
side of the high voltage transformer
Discovery of x rays
Give this one a try later!
Wilhelm Roenqtgen November 8th, 1895
Working with a glass tube, exposed barium platinocyanide
The resulting glow was created by an X ray
Won the first Nobel Physics prize 1901
Step Up Transformer
Give this one a try later!
- Has more windings on the secondary coil
- It will increase the voltage from the primary coil, thus decreasing current
- Used in XRs
