MRI Scan Parameters Quiz

What does the Repetition time (TR) control in MRI scans?

• Net magnetization in the longitudinal plane

• Signal decay in the transverse plane

• T2 relaxation time of the tissue

• T1 relaxation time of the tissue

What is the Echo time (TE) responsible for in MRI scans?

• Affecting the alignment of protons with the main magnetic field

• Increasing the signal-to-noise ratio

• Controlling the T1 relaxation time of the tissue

• Determining how much the transverse signal decays

How does a long TR affect the signal-to-noise ratio in MRI scans?

• Stabilizes the signal-to-noise ratio

• Has no effect on the signal-to-noise ratio

• Decreases the signal-to-noise ratio

• Increases the signal-to-noise ratio

What happens to the signal in tissues like white matter and gray matter with a long TE?

• Reduced signal

• Signal becomes stable

• Increased signal

• No effect on the signal

How does a short TE impact the signal-to-noise ratio in MRI scans?

• Decreases the signal-to-noise ratio

• No impact on the signal-to-noise ratio

• Stabilizes the signal-to-noise ratio

• Increases the signal-to-noise ratio

What combination of TR and TE parameters increases signal to noise ratio and contrast resolution in MR images?

• Long TR and long TE

• Long TR and short TE

• Short TR and long TE

• Short TR and short TE

Which parameter directly determines how much the transverse signal decays in MRI scans?

• Echo time (TE)

• Tissue contrast

• Net magnetization

• Repetition time (TR)

What is the main purpose of TR and TE in producing contrast between different tissues in MRI scans?

• Due to their individual relaxation properties

• To align protons with the main magnetic field

• To stabilize the signal-to-noise ratio

• To increase the T2 relaxation time