Radiographic Imaging

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Which of the following is a factor that affects scatter radiation?

Contrast

Scatter-Remnant Beam Ratio

Tissue Thickness (correct)

Long scale contrast

What is the purpose of using grids in radiographic imaging?

To increase the amount of scatter radiation

To increase the contrast resolution (correct)

To decrease the contrast resolution

To decrease the amount of primary photons

What is the Scatter-Remnant Beam Ratio (S/R Ratio) used to describe?

The ratio of contrast to noise in the image

The proportion of scattered photons exiting the patient relative to the number of photons exiting the patient on their initial trajectory (correct)

The signal to noise ratio in the image

The amount of primary photons absorbed by the patient

What is the impact of scatter radiation on contrast resolution?

It decreases the contrast resolution Signup and view all the answers

What is the primary effect of scatter radiation on the image quality?

It adds noise to the image Signup and view all the answers

What is the purpose of beam restricting devices in radiographic imaging?

To increase the sharpness of the image Signup and view all the answers

What is the abbreviation P.B.L stand for in radiographic imaging?

Primary Beam Limitation Signup and view all the answers

What is the impact of aggressive field collimation and the use of grids on scatter radiation?

They decrease the amount of scatter radiation Signup and view all the answers

What are the contrast areas on an x-ray image?

Areas of light, dark, and shades of gray Signup and view all the answers

What is the average Scatter-Remnant Beam Ratio (S/R Ratio) for an abdomen x-ray of an average patient of 20 cm thickness?

3:1 Signup and view all the answers

Which type of radiation is grids designed to absorb?

Scattered radiation Signup and view all the answers

What material is used for the radiopaque strips in a grid?

Lead (Pb) Signup and view all the answers

What is the general rule for using a grid?

Use a grid with thicker, larger body parts and high kVp techniques. Signup and view all the answers

Where is the grid located in relation to the object (patient) and the image receptor (IR)?

Between the object (patient) and the IR Signup and view all the answers

What is the function of an antiscatter grid?

To improve radiographic contrast by absorbing unwanted scatter radiation Signup and view all the answers

Can collimation be increased beyond its automatic limit?

No, collimation cannot be increased beyond its automatic limit Signup and view all the answers

What is the purpose of using beam restriction devices?

To limit the size of the x-ray beam and reduce patient dose Signup and view all the answers

Where are the radiolucent strips located in a grid?

Alternating with the radiopaque strips Signup and view all the answers

What determines the grid design?

The principles of photon path and divergence Signup and view all the answers

Where is the grid located in a bucky tray?

Reciprocating in a bucky tray Signup and view all the answers