GXMO Image Quality and Interpretation 2

Question 1

Which artifact appears as a grid-like pattern overlaid on the radiographic image when the grid is not properly aligned with the X-ray beam?

Accepted Answer

Moiré pattern

Answer

Quantum mottle

Answer

Penumbra artifact

Answer

Reticulation artifact

Question 2

A radiograph shows areas of increased density at the periphery of the image with decreased density at the center. What is the most likely cause?

Accepted Answer

Anode heel effect

Answer

Scatter radiation

Answer

Double exposure

Answer

Grid cutoff

Question 3

Which factor primarily determines the recorded detail (sharpness) in a radiographic image?

Accepted Answer

Focal spot size

Answer

mAs setting

Answer

Grid ratio

Answer

Film processing temperature

Question 4

When evaluating a chest radiograph, you notice the left hemidiaphragm appears elevated and the mediastinum is shifted to the left. What does this suggest?

Accepted Answer

Left lung collapse (atelectasis)

Answer

Left-sided pleural effusion

Answer

Right-sided tension pneumothorax

Answer

Left-sided pneumothorax

Question 5

What is the primary purpose of using a high kVp technique in chest radiography?

Accepted Answer

To penetrate the mediastinum and show lung detail simultaneously

Answer

To reduce patient dose without affecting image quality

Answer

To increase contrast between soft tissues

Answer

To decrease the effect of scatter radiation

Question 6

Which term describes the ability of an imaging system to distinguish between two adjacent structures that have very similar subject contrast?

Accepted Answer

Contrast resolution

Answer

Spatial resolution

Answer

Dynamic range

Answer

Modulation transfer function

Question 7

A lateral lumbar spine radiograph shows the vertebral bodies but the spinous processes are not visible. What technique error is most likely responsible?

Accepted Answer

Insufficient penetration (too low kVp)

Answer

Excessive mAs causing overexposure

Answer

Grid lines superimposed on the image

Answer

Patient rotation during exposure