Prime & Geometric Factors
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| What are the 4 prime factors of the x-ray beam? | show 🗑
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| show | Detail
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| show | 1) Visibility of detail
2) Geometric Detail
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| show | Visibility of detail
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| These are factors that can be measured: | show 🗑
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| show | Resolution
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| show | Reduce visibility of detail
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| Increasing motion will have what effect on the visibility of detail? | show 🗑
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| show | Reduce
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| kVp or mA that is too high or too low will have what effect on the visibility of detail? | show 🗑
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| What has the greatest effect on the reduction of detail? | show 🗑
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| show | Larger; Reduces
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| show | 1) Short exposure technique
2) Immobilization
3) Suspension of respiration
4) Communication
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| What is the MOST important way to reduce motion? | show 🗑
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| Geometric detail refers to what 2 radiographic properties? | show 🗑
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| Image proper or true image is called: | show 🗑
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| The light hazy area surrounding the true image is called: | show 🗑
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| show | Reduces detail
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| show | SID, OID, FSS
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| Regarding Geometric Detail and the factors that affect it, what is the best factor settings to produce the greatest geometric detail? | show 🗑
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| Of the 3 factors that affect Geometric Detail, which factor affects Geometric Detail the most? | show 🗑
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| show | Increase penumbra
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| Shorter SID's do what to penumbra? | show 🗑
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| Extremities would tend to require a small or large FSS? | show 🗑
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| show | Large FSS
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| show | Small FSS
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| show | Increase the SID
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| As mA is increased, what happens to the focal spot? | show 🗑
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| show | Pinhole Camera
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| What is used to measure the focal spot size on focal spots smaller than 0.3mm? | show 🗑
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| show | Line Focus Principle
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| show | Large; Sharpness; Small
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| show | Actual focal spot
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| show | Effective focal spot
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| This is the area bombarded by electrons: | show 🗑
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| What is the average target angle? | show 🗑
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| The smaller the angle, the ________ the effective focal spot. | show 🗑
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| Small angle = _________ effective focal spot | show 🗑
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| What tool is used to measure the radiographic detail? | show 🗑
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| SOD: _______ _______ ________ | show 🗑
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| How can you calculate the SOD? | show 🗑
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| show | FSS(width) X OID ÷ SOD
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| In calculating for penumbra, the smaller the number would equal what? | show 🗑
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| show | Distortion
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| What are the 2 types of distortion? | show 🗑
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| True distortion is _________ distortion. | show 🗑
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| show | Shape
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| show | Size distortion
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| The width of the image is to (÷) the width of the object as the (=) distance of the image from the light source is to the distance of the object from the light source: | show 🗑
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| show | Image width ÷ Object width = SID ÷ SOD (I/O=I/O)
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| Decreasing _______ = increase in magnification | show 🗑
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| show | Shape Distortion
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| Shape distortion is caused by misalignment of _________, _________, or __________. | show 🗑
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| show | Definition
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| Ideally, what should be parallel and what should be perpendicular? | show 🗑
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| What are the 2 types of shape distortion? | show 🗑
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| show | Foreshortening
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| show | Tube Angulation
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| show | OID
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| show | Inclined
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| How can distortion be corrected? | show 🗑
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| show | OID
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| show | Magnification
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| show | 2 times larger
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| show | Inclined
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| show | None
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| show | None
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| show | Focal Spot Size
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| show | Small
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| show | Sharp
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| An IVP is routinely conducted with an anteroposterior projection to ________ the FSB of the kidneys. | show 🗑
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| What principally controls geometric blur? | show 🗑
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| show | Small
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| show | Penumbra
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| Imaging an object lateral to the central axis of the beam will cause FSB to be __________ on the __________ side. | show 🗑
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| show | SID
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| When the focal spot is switched from large to small, penumbra will be _________. | show 🗑
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| Image contrast is the product of image receptor contrast and ___________ contrast. | show 🗑
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| Spatial resolution is principally affected by what? | show 🗑
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| show | Blur
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| Use of contrast media principally affects ____________ resolution. | show 🗑
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| Increasing collimation results in improved ___________ resolution and patient dose. | show 🗑
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| show | Focal Spot Size
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| kVp does what to image blur? | show 🗑
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| show | Spatial
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| show | Increase
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| show | mA; mAs is adjusted by reducing time (shorter exposure) which reduces blur (motion)
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| the ability of an imaging system to discriminate between two adjacent high-contrast objects. | show 🗑
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| show | Nothing
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| When an object is to one side of the central axis of the x-ray beam, what will happen to magnification? | show 🗑
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| show | Nothing
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| show | Nothing
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Created by:
foster1317
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