Radiographer

On average, children require what change to technical factors during an x-ray exam?

• 25% decrease mAs

• 15% increase mAs

• 25% decrease in kVP

• 15% decrease in kVp

Recognize this CT artifact?

(click on the picture to zoom in)

• Metallic (streaks) artifact

• Partial volume artifact

• Beam hardening artifact

• Ring artifact

A radiographer performed a slice thickness (ST) accuracy check for ST = 10 mm. The tolerance accepted value is ___________

• 0.5 mm

• 1 mm

• 1.5 mm

• 2 mm

This is a CT scan image of ACR phantom to evaluate _________

• Low contrast resolution

• High contrast resolution

• CT number uniformity

• Noise

Tags

NGSS.HS-PS4-5

Which of the following does NOT required to check the radiation dose in CT scan?

• Head CT dose index phantom

• Body CT dose index phantom

• pencil ionizing chamber

• TLD (thermoluminescent dosimeter)

In every complete CT scan of a peadiatric abdomen, the volume computed tomography dose index (CTDI) must not exceed _______ mGy.

• 20

• 30

• 50

• 75

Streaks artifact caused by a _________ located in the scanning field of view.

• metal

• liquid

• bone

• air

Tags

NGSS.HS-PS4-3

What is the primary role of a radiographer in a medical setting?

• To diagnose diseases

• To perform surgical procedures

• To operate imaging equipment

• To prescribe medication

Tags

NGSS.HS-PS4-5

Which of the following imaging techniques is most commonly used by radiographers?

• Ultrasound

• X-ray

• MRI

• CT scan

In radiography, what does the term 'contrast' refer to?

• The sharpness of the image

• The difference in density between two areas

• The color of the image

• The size of the image