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WorksheetsCT Components
Total questions: 10
Worksheet time: 5mins
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
