The Cubic Shaped Voxel Question

The Cubic Shaped Voxel Question

Instructions:

The Cubic Shaped Voxel Question

1.) Which of the following statement is/are TRUE?

A long TR increases SNR

A short TE increases SNR

A shorter flip angle decreases SNR

An isotropic voxel refers to a: circular shaped voxel cubic shaped voxel rectangular shaped voxel triangular shaped voxel
3.) QUESTION 3

Which of the following would achieve the highest SNR for a given sequence? Using a Gradient Echo pulse sequence using a fine matrix using thick slices using the smallest FOV possible

a diagram of a gating procedure Fourier transformational pulse sequence the Lamour equation
QUESTION 5

pixel size voxel size signal to noise ratio contrast to noise ratio

QUESTION 6

slice select gradient phase encode gradient frequency encode gradient readout gradient

QUESTION 7

large volumes of data multiplanar reconstruction variable sized slices high resolution

QUESTION 8

without increasing scan time is to: increase slice thickness increase the number of signal averages decrease the voxel size increase the number of slices

QUESTION 9

T1T2T2*PRoton Density (PD)

QUESTION 10

is considered false about a coarse matrix.
A course matrix contains a large number of voxelsA coarse matrix has a low number of frequency and phase encode steps
A course matrix increases the signal to noise SNR relative to a fine matrix
All of the above answers are false

QUESTION 11

Decreasing the FOV will decrease the voxel volume size, which will decrease SNR.
True False

QUESTION 12

Doubling the number of signal averages (NSA, NEX, AQS) will double the SNR

True False

QUESTION 13

A Short Tau Inversion Recovery (STIR) is an ideal sequence for post contrast (GBCA) imaging. True False

QUESTION 14

GRE sequences have more signal than spin echo or fast spin echo sequences because GRE sequences convert all of the longitudinal magnetization into the transverse plane.
True False

QUESTION 15

List 2 ways to improve spatial resolution

QUESTION 16

According to Westbrook (p.234 – 235) what are two advantages of using rectangular field of view (recFOV)?

QUESTION 17

What is a volume image? How is volume imaging achieved? How does voxel dimensions affect image resolution?

QUESTION 18

What is a 3D volumetric acquisition? What are the advantages of volumetric imaging What is slice encoding? Westbrook, p. 207 – 208

The Cubic Shaped Voxel Question

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Excellent Quality 95-100%	Introduction 45-41 points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.		Literature Support 91-84  points The background and significance of the problem and a clear statement of the research purpose is provided. The search history is mentioned.			Methodology 58-53 points Content is well-organized with headings for each slide and bulleted lists to group related material as needed. Use of font, color, graphics, effects, etc. to enhance readability and presentation content is excellent. Length requirements of 10 slides/pages or less is met.
Average Score 50-85%	40-38 points More depth/detail for the background and significance is needed, or the research detail is not clear. No search history information is provided.		83-76  points Review of relevant theoretical literature is evident, but there is little integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are included. Summary of information presented is included. Conclusion may not contain a biblical integration.			52-49  points Content is somewhat organized, but no structure is apparent. The use of font, color, graphics, effects, etc. is occasionally detracting to the presentation content. Length requirements may not be met.
Poor Quality 0-45%	37-1 points The background and/or significance are missing. No search history information is provided.		75-1 points Review of relevant theoretical literature is evident, but there is no integration of studies into concepts related to problem. Review is partially focused and organized. Supporting and opposing research are not included in the summary of information presented. Conclusion does not contain a biblical integration.			48-1 points There is no clear or logical organizational structure. No logical sequence is apparent. The use of font, color, graphics, effects etc. is often detracting to the presentation content. Length requirements may not be met
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