PRINCIPLES OF IMAING - Midterms (Part 3)

What is the primary purpose of radiographic grids

• Reduce scatter radiation
• increase radiation exposure
• decrease patient does
• improve spatial resolution

Which of the following body habitus types os considered less common

• Hypersthenic
• Stenic
• Hyposthenic
• Asthenic

How does increasing OID affect radiographic contrast

• Increases it
• Decreases it
• Hyas no effect
• Decreases spatial resolution

In radiography, what does CR stand for

• Contrast resolution
• Central ray
• Compression Ratio
• Control Room

What is the impact of increasing SID on image density

• Decreases Density
• Increases density
• No impact on density
• Increases spatial resolution

Which factor affects radiographic density by darkening the image and is not directly proportional to it

• kvp
• mAs
• SID
• OID

Which type of x-ray generator has the highest output efficiency

• high-frequency
• Single-phase
• Three-phase
• All have the same output efficiency

The inverse square law states that the intensity of the beam is inversely proportional to what

• SID
• OID
• Distance from the source
• density

When a grid is added to a radiographic exposure, what must be adjusted to compensate for the decrease in exposure

• mAs
• kvp
• SID
• OID

What is the purpose of compensating filters in radiography

• To create a more uniform exposure to the IR in areas with varying tissue thickness
• To reduce patient does
• TO increase image sharpness
• To reduce exposure time