121 Imaging Unit 1
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| show | Quantitative
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| show | Completeness
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| Density & Contrast control the _____ of details | show 🗑
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| Proper _____ is required to correctly evaluate contrast, recorded detail or distortion | show 🗑
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| Factors that Influence & Control Density are: 2 things | show 🗑
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| What are the 4 prime factors? | show 🗑
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| Things that determine Pt. thickness & Opacity | show 🗑
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| show | 1) 2x mAs + 10% kVp
2) +15kVp
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| show | 1) 2x mAs
2) 15 kVp
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| ____, ______, ______, & ______ are main factors that influence how much radiation will be absorbed by a body part | show 🗑
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| __-___cm thickness of normal tissue will absorbe ____% of a typical beam of xrays | show 🗑
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| show | 1) Tube current
2) mA
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| mA controls the _________ of the x-ray beam | show 🗑
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| show | Directly
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| ______ _______ is the duration that the tbe current is allowed to flow. | show 🗑
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| ____ does not control or influence the exposure rate, but rather how long the exposure is permitted to continue | show 🗑
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| mAs is the ______ of mA & _____. | show 🗑
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| Radiographic density is _____ proportional to mAs | show 🗑
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| show | Inversely
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| show | 30%
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| show | 1) reduce
2) one half
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| show | 1) increase
2) Double
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| show | Blooming
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| Blooming or slight enlargment of the focal spot occurs with ______ ______ of mA. The F.S. tends to decrease slightly when kVP is ______ | show 🗑
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| Changing mAs does not influence the penetration ability of the xray beam? True or False | show 🗑
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| show | xray photons
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| show | kVp
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| show | 1) increase
2) more
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| 1) kV increase will increase the _____ & ______ of the beam and _____ the wavelength. | show 🗑
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| show | increase
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| kV is the controlling factor of _______. | show 🗑
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| show | decreases
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| kVp is a secondary controlling or influencing factor for ______ | show 🗑
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| kVp has a ______ relationship b/t it and exposure but it is not proportional. | show 🗑
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| There is no precise method for determining kVp-mAs density ratio. True or False | show 🗑
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| Law of Reciprocity | show 🗑
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| show | 1) Recorded Detail
2) Distortion
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| Recorded Detail has 3 factors | show 🗑
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| show | 1) Focal Spot size
2) SID
3) OID
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| Material factors are (2) | show 🗑
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| show | 1) Size distortion
2) Shape Distortion
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| Size distortions are (2) | show 🗑
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| Shape Distortion is | show 🗑
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| show | 1) Density
2) Contrast
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| show | 1) mAs
2) kVp
3) SID
4) Collimation
5) Grid Ratio
6) Filtration
7) Pathology
8) Anatomy
9) Film/Screen Combination
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| show | 1) kVp
2) Collimation
3) Grid Ratio
4) Filtration
5) Pathology
6) Anatomy
7) Film/Screen Combination
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| show | 1) Air
2) Nothing
3) Fat
4) Fluid/Water
5) Muscle, Blood, Solid Organs
6) Bone, Contrast Media
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| Grid Factors 1) NO Grid = _____ 2) 5:1=____ 3) 6:1=____ 4) 8:1=____ 5) 10:1 & 12:1=____ 6) 15:1 & 16:1=____ | show 🗑
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| Black areas are called _____ and white areas are called _____ | show 🗑
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| Black areas on the film have received less radiation exposure. True or False | show 🗑
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| show | True
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| show | 1) Density
2) Contrast
3) Recorded Detail
4) Distortion
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| _______ measures light transmitted through Film | show 🗑
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| show | Dosimeter
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| _____ _____ _____ are on the film and react with xray Photons afterward they become ____ ____ ____ which shows up black on xray film | show 🗑
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| show | Gurney-Mott Theory
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| Density is useful as a diagnostic tool when it falls within this range. | show 🗑
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| show | Photon
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| show | Time
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| show | Roentgen
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| show | True
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| ______ is the adding or removing of electrons from an atom | show 🗑
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| mAs is the ______ controller of x-ray _____ & ______ | show 🗑
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| show | False
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| show | 1) High
2) High
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| show | 1) low
2) Low
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| show | kVp
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| Doubling the kVp will cause density to increase by a factor of 4, 5, or 6 True or False | show 🗑
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| show | 5%
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| To increase kVp by 15% is like doubling the mAs and decreasing kVp by 15% is like halving the mAs this is called the what | show 🗑
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| show | inversely
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| to decrease contrast and maintain density you would do what | show 🗑
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| show | Decrease kVp by 15% & Double mAs
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