Seventh Generation MS/MD CT System Quiz

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What is the primary difference between multislice CT (MSCT) and single slice CT (SSCT)?

Detector arrangement (correct)

Image resolution

Diagnostic techniques

Scan time

How has the performance of CT been improved with the introduction of multislice CT (MSCT) according to the text?

Reduced imaging range

Decreased image resolution

Increased radiation exposure

Shortened scanning time (correct)

What effect does increasing the number of detector rows have on multislice CT (MSCT)?

Reduces scan length

Increases the strain on the x-ray tube

Increases the number of gantry rotations needed

Decreases z-axis coverage slab thickness (correct)

How does multislice CT (MSCT) compare to single slice CT (SSCT) in terms of tomographic plane width?

MSCT has a reduced tomographic plane width compared to SSCT Signup and view all the answers

What is the advantage of having multiple rows of CT detectors in multislice CT (MSCT)?

Decreased strain on the x-ray tube Signup and view all the answers

How has the introduction of multislice CT (MSCT) affected the time required for 1 revolution of scanning?

Decreased to 0.5 sec Signup and view all the answers

What is the key difference between SSCT and MSCT in terms of slice thickness?

In SSCT, slice thickness is determined by x-ray beam collimation, while in MSCT, it is determined by detector configuration. Signup and view all the answers

What is the primary advantage of MSCT over SSCT in terms of imaging large volumes of tissue?

MSCT can cover larger body sections in shorter scan times with thinner beams. Signup and view all the answers

What is the relationship between the number of detector rows and cone beam artifact severity in MSCT?

Cone beam artifact severity is directly proportional to the number of detector rows. Signup and view all the answers

What is the key advantage of MSCT over SSCT in terms of x-ray tube output limitations?

MSCT can overcome the x-ray tube output limitation encountered in SSCT. Signup and view all the answers

What is the key difference between matrix detectors and adaptive array detectors in MSCT?

Matrix detectors have equal thickness detector rows, while adaptive array detectors have varying thickness detector rows. Signup and view all the answers

What is the key difference between hybrid detectors and matrix detectors in MSCT?

Hybrid detectors have smaller detector rows in the center, while matrix detectors have equal thickness detector rows. Signup and view all the answers

What is the relationship between detector row number and slab thickness in MSCT?

Slab thickness is directly proportional to the detector row number. Signup and view all the answers

How can the slice thickness be varied in MSCT scanners with multiple detector arrays?

By varying the detector size. Signup and view all the answers

What is the purpose of selectively activating or deactivating detector groups in MSCT?

To provide various slice thicknesses based on the scan indication. Signup and view all the answers

What is the key difference between the x-ray beam configuration in SSCT and MSCT?

SSCT uses a fan beam, while MSCT uses a cone beam. Signup and view all the answers

What is the definition of detector pitch?

The table rotation per gantry rotation divided by the width of the detector Signup and view all the answers

What is the key advantage of Dual Source CT (DSCT) over single source CT?

It can double the resolution and increase the speed of data acquisition Signup and view all the answers

What is the key difference between Dual Source Single Energy (DSSE) mode and Dual Source Dual Energy (DSDE) mode in DSCT?

DSSE uses two X-ray tubes at the same kVp setting, while DSDE uses two X-ray tubes at different kVp settings Signup and view all the answers

What is the key advantage of Dual Energy CT (DECT) over conventional CT?

DECT can differentiate between fat, soft tissue, bone, calcifications, and contrast material Signup and view all the answers

What is the main principle behind the energy-dependent attenuation differences used in Dual Energy CT (DECT)?

The degree of X-ray beam attenuation depends on the tissue composition and the photon energy level compared to the K-edge of the material Signup and view all the answers

What is the key difference between Dual Source Dual Energy (DSDE) mode and Single Source Dual Energy (SSDE) mode in DSCT?

DSDE uses two X-ray tubes at different kVp settings, while SSDE uses a single X-ray tube with fast kVp switching Signup and view all the answers

What is the key advantage of Dual Energy CT (DECT) over traditional structural-only CT images?

DECT can provide functional parameters such as iodine concentration in different tissues Signup and view all the answers

What is the key principle behind the differentiation of materials in Dual Energy CT (DECT)?

The inherent contrast generation of the image dataset depends on differences in photon attenuation of the various materials Signup and view all the answers

What is the key difference between Dual Source CT (DSCT) and Single Source Dual Energy (SSDE) CT?

DSCT uses two X-ray tubes and two detectors, while SSDE uses a single X-ray tube with fast kVp switching and a dual-layer detector Signup and view all the answers