CT Scan Quiz

CT stands for:

• Contrast Tomography

• Computed Tomography

• Conventional Tomography

• Cranial Tomography

The inventor of CT scan was:

• Wilhelm Roentgen

• Godfrey Hounsfield

• Marie Curie

• Wilhelm Weber

The year in which the first clinical CT scanner was introduced:

• 1965

• 1972

• 1980

• 1950

The unit used to measure CT numbers is:

• Gray

• Roentgen

• Hounsfield Unit

• Sievert

The X-rays used in CT scanning are produced by:

• Gamma rays

• Radioactive isotopes

• X-ray tube

• Laser beams

The primary advantage of CT over conventional radiography is:

• Higher dose

• Cross-sectional imaging

• Lower resolution

• Simpler operation

The part of CT scanner that detects transmitted X-rays is:

• Gantry

• Detector array

• Collimator

• Couch

The CT number for water is:

• 0

• 100

• -1000

• +1000

The CT number for air is approximately:

• +1000

• 0

• -1000

• +500

The CT number for bone is approximately:

• -1000

• +1000

• 0

• +500