CT Equipment Configuration Quiz

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What is the main purpose of the imaging system in CT?

To produce x rays and detect radiation passing through a defined cross-section of the patient (correct)

To regulate the temperature in the operator's room

To house the display and storage components

To operate the computer system

Where is the computer system located in a CT setup?

Computer room (correct)

Display and recording room

Scanner room

Operator’s room

Which component is responsible for X-ray production in the imaging system?

X-ray tube and generator (correct)

Collimators

Detector electronics

Filter

What is the function of collimators in the imaging system?

Define slice thickness and restrict X-ray beam to cross-section of interest Signup and view all the answers

Where are the display, recording, and storage components typically located in modern CT setups?

Operator's room Signup and view all the answers

Which part of the imaging system ensures beam uniformity at the detectors?

Filter Signup and view all the answers

What is the function of the glass envelope in an x-ray tube?

To provide structural support for the anode and cathode structures Signup and view all the answers

Why are rotating anode X-ray tubes common in CT scans?

Because of the demand for increased spatial resolution Signup and view all the answers

What is the purpose of the bearing assembly in an x-ray tube?

To ensure smooth rotation of the anode disk Signup and view all the answers

Why do tubes with metal envelopes solve the problem of electrical arcing?

Because metal provides better thermal and electrical insulation Signup and view all the answers

Which type of design is most commonly used in tubes for spiral/helical CT scanning?

Brazed graphite anode disk Signup and view all the answers

What is the significance of using rhenium, tungsten, molybdenum (RTM) alloy in X-ray tubes?

To facilitate spatial resolution requirements Signup and view all the answers

Which material has about 10 times higher thermal capacity than tungsten?

Graphite Signup and view all the answers

Why can't tubes with all-metal disks meet the needs of spiral/helical CT imaging?

Because they are heavier than graphite disks Signup and view all the answers

What is the purpose of the cathode assembly in an x-ray tube?

To generate x-rays through thermionic emission Signup and view all the answers

What component design advances have been made to achieve higher power levels in x-ray tubes for continuous rotation scanners?

Redesigning tube envelope, cathode assembly, anode assembly, and target design Signup and view all the answers

What is the primary purpose of the liquid-bearing technology used in the Straton X-Ray Tube?

To conduct heat away from the X-ray tube more efficiently Signup and view all the answers

How does the Straton X-Ray Tube overcome the heat dissipation and cooling rate issues of conventional X-ray tubes?

By encasing the tube in a protective housing filled with oil for direct cooling Signup and view all the answers

What is the advantage of the electron beam in the Straton X-Ray Tube?

It is deflected to strike the anode at two precisely located focal spots Signup and view all the answers

What is the purpose of alternating the electron beam in the Straton X-Ray Tube?

To create two separate X-ray beams for improved image quality Signup and view all the answers

What is one of the advantages of the Straton X-Ray Tube compared to conventional X-ray tubes?

It has a longer tube life, ranging from 10,000 to 40,000 hours Signup and view all the answers

Which of the following is NOT an advantage of the Straton X-Ray Tube?

Improved spatial resolution due to smaller detector size Signup and view all the answers

What is the primary function of the gantry in a CT scanner?

To rotate around the patient and capture x-ray images Signup and view all the answers

What is the purpose of the gantry aperture?

To provide access for positioning the patient Signup and view all the answers

What is the typical range of tilt for the CT gantry?

±12 to ±30 degrees Signup and view all the answers

What is the purpose of the laser beams in a CT scanner?

To aid in patient positioning Signup and view all the answers

Which of the following is NOT an essential part of the gantry?

Image reconstruction software Signup and view all the answers

What is the purpose of the high-voltage generator in a CT scanner?

To provide the high-voltage required for x-ray production Signup and view all the answers

What is the typical power rating range for CT generators?

20 to 100 kilowatts Signup and view all the answers

Which component of the CT scanner converts the analog information from the detectors into digital data?

The detector electronics or data acquisition system (DAS) Signup and view all the answers

What is the primary function of the collimators in a CT scanner?

To shape and control the x-ray beam Signup and view all the answers

What is the purpose of the slip rings in the CT gantry?

To provide power and data transfer to the rotating components Signup and view all the answers