CT Components

What does CT stand for in medical imaging?

• Computed Transmission

• Computed Tomography

• Continuous Tomography

• Computed Telemetry

Which component in a CT scanner generates the X-ray beams?

• Detector array

• Gantry

• X-ray tube

• Collimator

What is the typical aperture size for most CT gantries?

• 50 cm

• 60 cm

• 70 cm

• 80 cm

Which material is commonly used for the anode in modern CT X-ray tubes to enhance heat storage capacity?

• Tungsten

• Graphite

• Copper

• Aluminum

What is the primary function of a CT detector?

• To generate X-rays

• To capture transmitted radiation and convert it into electrical signals

• To rotate the gantry

• To cool the X-ray tube

Which of the following is NOT an ideal feature of CT detectors?

• High Detective Quantum Efficiency (DQE)

• Low Conversion Efficiency (CE)

• Fast Response Time

• High Quantum Absorption Efficiency (QAE)

In CT imaging, what does pitch refer to?

• The angle of the X-ray tube

• The table movement per rotation divided by slice thickness

• The detector array alignment

• The focal spot size

Which type of detector uses xenon gas to convert X-rays directly into electrical signals?

• Scintillation detector

• Gas ionization detector

• Photodiode-based detector

• PMT-based detector

What is the primary advantage of using metal-ceramic X-ray tubes in CT scanners?

• Reduced heat capacity

• Increased tube life and higher tube loading

• Smaller anode size

• Use of glass envelope

In CT imaging, what does the term 'isocenter' refer to?

• The center of the X-ray tube

• The point through which the central ray of radiation passes, centered in the gantry bore

• The center of the patient couch

• The point where detectors are aligned