Basic Principles of CT Scanners: Generations of CT

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What distinguishes fifth-generation CT scanners from fourth-generation scanners?

The electron beam hits a fixed anode.

The detector array rotates around the patient.

The x-ray source becomes an integral part of the system design. (correct)

The x-ray source rotates around the patient.

Which generation of CT scanners uses a rotating x-ray source inside a fixed detector array?

Second generation

Third generation

Fifth generation

Fourth generation (correct)

In fifth-generation CT scanners, what material is the anode made of?

Copper

Aluminum

Steel

Tungsten (correct)

How do fourth-generation CT systems differ from third-generation systems?

Fourth-generation systems have a rotating x-ray source inside a fixed detector array. Signup and view all the answers

Which type of CT scanner produces collimated fan beam x-rays with no moving parts?

Fifth generation Signup and view all the answers

What was the significant advancement in the first-generation CT scanners?

The use of a single highly collimated X-ray pencil beam and detector Signup and view all the answers

Which of the following statements accurately describes the evolution of CT scanners?

The X-ray beam shape evolved from pencil beam to narrow beam to fan beam Signup and view all the answers

Who was the pioneer behind the development of the first CT scanner?

Godfrey Hounsfield Signup and view all the answers

What was the initial application of the first CT scanner developed by Godfrey Hounsfield?

Brain study Signup and view all the answers

Which of the following statements accurately describes the detector arrangement in first-generation CT scanners?

A single detector moving in parallel with the X-ray beam Signup and view all the answers

What was the primary advantage of the advancements in CT scanner technology over time?

Decreased scan time Signup and view all the answers

What was the primary limitation of first-generation CT scanners?

They could only perform head scans Signup and view all the answers

What was the key difference between first and second-generation CT scanners?

Second-generation scanners used a fan beam instead of a pencil beam Signup and view all the answers

What was the primary advantage of using a fan beam in second-generation CT scanners?

Reduced scan time Signup and view all the answers

In first-generation CT scanners, how was the translation and rotation motion achieved?

Both the source and the detector translated and rotated around the patient Signup and view all the answers

What was the purpose of the highly collimated beam in first-generation CT scanners?

To reject scattered radiation from the patient Signup and view all the answers

What was the approximate scan time for a single slice in second-generation CT scanners?

20 seconds Signup and view all the answers

Basic Principles of CT Scanners: Generations of CT

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