Bushong (9th; Ch 8)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
|
|
||||
|---|---|---|---|---|---|
| Energy of motion | Kinetic energy
🗑
|
||||
| Approximately __% of the _______ energy of __________ electrons is converted into heat. | 99; kinetic; projectile
🗑
|
||||
| ______________ x-rays are emitted when an outer-shell ________ fills and inner-shell ____. | Characteristic; electron; void
🗑
|
||||
| Only the _-characteristic x-rays of ________ are useful for imaging. | K; tungsten
🗑
|
||||
| Characteristic ___________ is characteristic of the ______ _______. | x-radiation; target element
🗑
|
||||
| travel from cathode to anode; constitute the x-ray tube current | Projectile electrons
🗑
|
||||
| result from electron transitions into the K shell | K x-rays
🗑
|
||||
| Define Bremsstrahlung | German for "slowed-down radiation"
🗑
|
||||
| ______________ x-rays are produced when a projectile electron is ______ by the electrical field of a target atom nucleus. | Bremsstrahlung; slowed
🗑
|
||||
| Formula for kinetic energy | KE = ½ mv²
🗑
|
||||
| Atomic number of Tungsten | 74
🗑
|
||||
| At 100 kVp, ___ of the x-ray beam is ______________ and ___ is ______________. | 15%, characteristic; 85%, Bremsstrahlung
🗑
|
||||
| Binding energy unit | Kiloelectron volt (keV)
🗑
|
||||
| Binding energy is also referred to as | Effective energy of x-ray = quality of x-ray beam
🗑
|
||||
| In the __________ range, most x-rays are ______________ ______. | diagnostic; Bremsstrahlung x-rays
🗑
|
||||
| Symbol for Tungsten on the periodic table of elements | W
🗑
|
||||
| Number of electrons on K shell | 2
🗑
|
||||
| Binding energy of K-shell | 69
🗑
|
||||
| Number of electrons on L shell | 8
🗑
|
||||
| Binding energy of L-shell | 12
🗑
|
||||
| A ________ ________ contains only specific values; often indicated on a bar graph. | discreet spectrum
🗑
|
||||
| the range of types of values of any quantity, such as x-rays | spectrum
🗑
|
||||
| A __________ ________ contains all possible values; indicated by a curve or line graph. | continuous spectrum
🗑
|
||||
| demonstrates values of x-ray tube output: number of x-rays and x-ray energy. Used to understand how changes in voltage, kVp, mA & added filtration affect image quality. | x-ray emission spectrum
🗑
|
||||
| ______________ x-rays have precisely fixed (________) energies and form a ________ emission spectrum. | Characteristic; discreet; discreet
🗑
|
||||
| ______________ x-rays have a range of energies and form a __________ emission spectrum. | Bremsstrahlung; continuous
🗑
|
||||
| Maximum x-ray ______ is associated with the minimum x-ray __________ (λmin). | energy; wavelength
🗑
|
||||
| X-ray energy is _________ ____________ to its wavelength; as x-ray wavelength increases, x-ray energy _________. | inversely proportional; decreases
🗑
|
||||
| a process of calculating the total number of x-rays emitted from an x-ray tube by adding together the number of x-rays emitted at each energy over the entire spectrum. | integration
🗑
|
||||
| x-ray intensity = | x-ray quantity
🗑
|
||||
| A change in mA or mAs results in a proportional change in the _________ of the x-ray ________ ________ at all energies. | amplitude; emission spectrum
🗑
|
||||
| 4 principal factors of the _____ of an x-ray emission spectrum: 1) low-energy produces ___-______ x-rays, 2) low energy= lose energy by ___________ 3) low-energy x-rays: target __________ 4) __________- removes low-energy x-rays | shape
1) low-energy
2) interaction
3) absorption
4) filtration
🗑
|
||||
| A change in kVp affects both the _________ and the ________ of the x-ray emission ________. | amplitude; position; spectrum
🗑
|
||||
| A change in kVp has __ ______ on the position of the ________ x-ray emission spectrum. | no effect; discrete
🗑
|
||||
| In the diagnostic range, a ___ increase in kVp is = to doubling the ___. | 15%; mAs.
🗑
|
||||
| The result of added __________ is an ________ in the average energy of the x-ray beam with an accompanying _________ in x-ray quantity. | filtration; increase; decrease
🗑
|
||||
| refers to adding filtration and its effect of the relative increase in average energy of the x-ray beam | hardening
🗑
|
||||
| Increasing target ______ ______ enhances the __________ of x-ray production and the ______ of characteristic and bremsstrahlung x-rays. | atomic number; efficiency; energy
🗑
|
||||
| Atomic number of Gold | 79
🗑
|
||||
| Atomic number of Molybdenum | 42
🗑
|
||||
| Atomic number of Rhodium | 45
🗑
|
||||
| Target elements used for mammography | Molybdenum & rhodium
🗑
|
||||
| Because of reduced ______, operation with _____-phase power or ___ _________ is = to an approximate 12% ________ in kVp, or almost a doubling of mAs over ______-phase power. | ripple; 3; high frequency; increase; single
🗑
|
||||
| Diagnostic range | 20- 150 kVp
🗑
|
Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Created by:
GWCCRad12
Popular Radiology sets