Introduction To CT

Radiodensity is measured in CT using...

• Slices

• Houndsfield Units

• Attenuation Coefficient

The "pitch" of a scan is represented as a:

• range
• ratio

• distance measurement

• dose measurement

The "anode" in a CT X-ray tube is typically made of:

• Molybdenum

• Rhodium

• Gadolinium

• Tungsten

Draw the path that the X-ray beam would take around the patient during a helical acquisition.

Which of the following should be considered before administering iodine based contrast media intravenously? (Tick all that apply)

• Renal function

• Diabetic status

• Venous access

• Current medication being taken

What is the difference between a pixel and a voxel? (Tick all that apply)

• One is for images one is for videos

• One is 2D one is 3D

• One represents an area the other represents a volume of a dataset

• One is higher dose than the other.

On the scale pictured, indicate where the Window Width (lowest and highest values) and Window Level would sit for an image with:

Window Width: 1000

Window Level: +100