Contrast, Detail, Distortion
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| An image with few densities but many differences between them has ___ Contrast? | show 🗑
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| show | High Contrast
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| show | Low Contrast (Long Scale)
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| show | Low Contrast
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| show | kVp
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| show | kVp, but altered by Computer
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| show | ↑ Transmission
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| ↑ kVp = __ Compton Interactions | show 🗑
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| ↑ kVp = __ Photoelectric Effect | show 🗑
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| show | ↑ Fog
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| show | ↑ kvp = ↓ Contrast
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| show | Low kVp = ↑ Photoelectric Absorption
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| Contrast Influencing Factors | show 🗑
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| show | ↑ kVp = ↑ Scatter
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| show | ↑ Grid = ↓ Scatter = ↑ Contrast
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| show | ↑ Collimation = ↓ Tissue Exposure = ↑ Contrast
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| ↑ OID = __ Scatter = __ Contrast | show 🗑
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| Do we adjust OID for contrast? Why or why not? | show 🗑
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| How does increasing OID increase Contrast? | show 🗑
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| ↑ Tissue Thickness = __ Scatter = __ Contrast | show 🗑
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| ↑ Tube Filtration = __ Scatter = __ Contrast | show 🗑
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| How does Tube Filtration decrease Contrast? | show 🗑
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| Result of kvp and absorption characteristics of anatomic tissue? | show 🗑
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| show | Film Contrast
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| _____ changes Absorption Characteristics of tissue by ↑ or ↓ Beam ____ ? | show 🗑
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| show | + Contrast Agent = More Absorption/Increased Brightness
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| (-/+) Contrast Agents increase transmission? | show 🗑
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| show | Positive Contrast Agents (Barium)
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| Film Processing temperatures outside Normal will ↑ or ↓ Contrast? | show 🗑
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| show | -15% kVp
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| Minimum kVp for Premies | show 🗑
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| show | 55 kVp
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| Minimum kVp for Child | show 🗑
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| mAs adjustment for ages 0-5? | show 🗑
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| show | 50% mAs of adult
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| What types of casts do not require technique changes? | show 🗑
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| Dry vs Wet theory for technique adjustment with Plaster Cast? | show 🗑
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| Alternate theory for technique adjustment with Plaster Cast? | show 🗑
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| show | Additive Diseases
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| show | Ascites, Cirrhosis, CHF, Pleural Effusion
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| ____ Diseases decrease absorption characteristics of part, making penetration easier? | show 🗑
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| Examples of Subtractive Diseases | show 🗑
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| show | Additive Diseases
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| show | Foreign body, Croup, Obstruction
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| show | ↓ mAs = ↓ Density
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| show | ↑ or ↓ kVp
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| show | Sharpness
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| show | Recorded Detail
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| show | OID, SID, Focal Spot Size
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| show | Penumbra
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| Penumbra | show 🗑
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| show | Recorded Detail
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| show | .5-.6 mm
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| show | 1-1.2 mm
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| show | ↑ SID = ↓ Unsharpness = ↑ Recorded Detail
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| How does increasing SID increase Recorded Detail? | show 🗑
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| show | ↑ OID = ↑ Unsharpness = ↓ Recorded Detail
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| show | OID
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| Optimal recorded detail when OID is ___ ? | show 🗑
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| show | ↑ SID sligthly
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| Calculating Distance Formula | show 🗑
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| Geometric Unsharpness Formula | show 🗑
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| show | Lowest # is Better Detail
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| ↑ Film Speed = __ Recorded Detail = __ Unsharpness | show 🗑
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| show | Less dose but Lower Recorded Detail
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| Unsharpness caused by patient motion? | show 🗑
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| show | 1. Short exposure
2. Clear Communication
3. Immobilize
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| ____ is the imaging system's ability to distinguish btwn two adjacent structures? | show 🗑
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| ____ is the smallest detail detected on the image? | show 🗑
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| show | Contrast Resolution
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| show | Line pairs per millimeter (Lp/mm)
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| show | One metal line + space = Line Pair
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| show | Distortion
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| show | Foreshortening
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| Shape Distortion where the CR or IR is misaligned? | show 🗑
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| show | Magnification
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| show | OID
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| ↑ OID = __ Size Distortion | show 🗑
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| Parts Closest to the IR will have more size distortion (T/F)? | show 🗑
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| ↑ SID = __ Size Distortion | show 🗑
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| ___ indicates how much Size Distortion is on an image? | show 🗑
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| show | MF = Image Size / Object Size
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| show | MF = SID / SOD
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| show | % Mag = {(Image Size-Object Size)/Object Size} x100
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| To calculate Image/Object Size, 1st Calculate ___ ? | show 🗑
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| show | Object Size = Image Size/MF
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