Computed Tomography Quiz

What does CT stand for in medical imaging?

• Computed Topography

• Computerized Transverse imaging

• Computed Tomography

• Computerized Thermography

Who is credited with the invention of the CT scanner?

• Wilhelm Conrad Roentgen

• Godfrey Hounsfield

• Marie Curie

• Raymond Damadian

Which generation of CT scanners uses a rotating X-ray tube and a stationary detector ring?

• First-generation

• Second-generation

• Third-generation

• Fourth-generation

What is the primary advantage of helical/spiral CT over conventional CT?

• Lower radiation dose

• Faster scan time and continuous volume acquisition

• Higher spatial resolution

• Reduced patient motion artifacts

Which of the following is NOT a component of a CT scanner?

• X-ray tube

• Gradient coils

• Detector array

• Gantry

What is the typical energy range (in kVp) used in diagnostic CT imaging?

• 40–80 kVp

• 80–140 kVp

• 150–300 kVp

• 30–50 kVp

Which CT reconstruction algorithm is most commonly used for image formation?

• Backprojection

• Filtered Backprojection

• Fourier Transform

• Iterative Reconstruction

What does 'Hounsfield Unit (HU)' measure in CT imaging?

• Radiation dose

• Tissue density/attenuation coefficient

• Scan time

• Detector sensitivity

What is the Hounsfield Unit (HU) value of water?

• 0 HU

• 100 HU

• -1000 HU

• 1000 HU

Which of the following materials has the highest HU value?

• Air (-1000 HU)

• Fat (-50 to -100 HU)

• Bone (+1000 HU or more)

• Muscle (+40 to +80 HU)