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MRI Imaging Procedures 1 - Week 5 (Quiz 3) with Complete Solutions
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MRI Imaging Procedures 1 - Week 5 (Quiz 3) with Complete Solutions Which type of MRI scan is most sensitive for detecting brain tumors? A) Diffusion-weighted imaging (DWI) B) Contrast-enhanced T1-weighted imaging C) Time-of-flight angiography D) Proton density-weighted imaging What is th...

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  • March 11, 2025
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  • 2024/2025
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MRI Imaging Procedures 1 - Week 5
(Quiz 3) with Complete Solutions
Which type of MRI scan is most sensitive for detecting brain tumors?

A) Diffusion-weighted imaging (DWI)


✔✔B) Contrast-enhanced T1-weighted imaging


C) Time-of-flight angiography

D) Proton density-weighted imaging




What is the main advantage of using parallel imaging in MRI?

A) Improved tissue contrast

B) Elimination of susceptibility artifacts


✔✔C) Faster scan times with reduced motion artifacts


D) Increased image noise




Which structure appears dark on all MRI sequences?

A) Fat

B) Muscle

C) Blood vessels

1

,✔✔D) Cortical bone




Which MRI sequence is most useful for diagnosing ligament injuries?

A) Gradient echo


✔✔B) Proton density-weighted imaging


C) T1-weighted imaging

D) Time-of-flight angiography




Which factor is most responsible for increasing the signal-to-noise ratio (SNR) in MRI?


✔✔A) Increasing magnetic field strength


B) Increasing TE

C) Using a lower TR

D) Reducing voxel size




What is the main safety concern when scanning a patient with a metallic foreign body in the eye?

A) Heat production

B) Claustrophobia


✔✔C) Potential movement of the metallic fragment, causing injury


2

,D) Increased scan time




Which MRI sequence is best for detecting early ischemic stroke?

A) STIR

B) Gradient echo

C) T1-weighted imaging


✔✔D) Diffusion-weighted imaging (DWI)




Which of the following can cause aliasing artifacts in MRI?


✔✔A) Anatomy outside the field of view wrapping into the image


B) Excessive TR values

C) Use of fast spin echo sequences

D) Improper RF pulse timing




Which patient condition may require a lower SAR (Specific Absorption Rate) MRI scan

protocol?

A) Hypertension


✔✔B) Pregnancy



3

, C) Muscle strain

D) Fractured bone




What is the primary purpose of the inversion recovery sequence in MRI?


✔✔A) To suppress specific tissue signals, such as fat or fluid


B) To reduce scan time

C) To increase spatial resolution

D) To prevent motion artifacts




Which of the following MRI sequences best demonstrates edema in soft tissues?


✔✔A) T2-weighted and STIR


B) T1-weighted

C) Proton density

D) Time-of-flight angiography




Which parameter is increased to improve tissue contrast in a T1-weighted MRI?


✔✔A) Short TR and short TE


B) Long TR and long TE


4

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