MRI ARMRIT Exam Questions Version 3 /MRI
ARMRIT prep Exam Questions and Answers
Practice Questions with Solutions Newest |
Already Graded A+
What is the primary purpose of an MRI echo?
A) To generate magnetic field gradients
B) To allow for patient positioning
C) To re-emit RF energy for image acquisition
D) To prevent magnetic field inhomogeneities - Correct Answer-C
Which of the following is true about Spin Echo (SE) sequences?
A) They use a 90-degree RF pulse followed by a 180-degree refocusing pulse
B) They are more susceptible to magnetic field inhomogeneities than GRE
C) They do not require an RF refocusing pulse
D) They are primarily used for T1-weighted imaging only - Correct Answer-A
What is the role of the 180-degree RF pulse in a Spin Echo sequence?
A) It enhances T1 relaxation
B) It refocuses dephased spins to form an echo
C) It prevents T2* effects
D) It speeds up scan time - Correct Answer-B
Page 1 of 103
,Gradient Echo (GRE) sequences differ from Spin Echo (SE) sequences because:
A) They use a 180-degree RF refocusing pulse
B) They rely on gradient fields to rephase spins instead of an RF pulse
C) They eliminate all susceptibility effects
D) They do not require an RF excitation pulse - Correct Answer-B
In MRI, an echo is generated by:
a) The interaction of RF pulses with the patient's tissues
b) The refocusing of dephased spins
c) The application of a static magnetic field
d) The emission of X-rays - Correct Answer-Answer: b) The refocusing of dephased spins
The time between the initial RF pulse and the peak of the echo signal is called:
a) Repetition time (TR)
b) Echo time (TE)
c) Inversion time (TI)
d) Flip angle - Correct Answer-Answer: b) Echo time (TE)
The spin echo is produced by which sequence of RF pulses?
a) 180° → 90°
b) 90° → 180°
c) 180° → 90° → 180°
d) 90° → 180° → 90° - Correct Answer-Answer: b) 90° → 180°
Page 2 of 103
,The purpose of the 180° refocusing pulse in a spin echo sequence is to:
a) Suppress fat
b) Rephase dephased spins
c) Saturate the magnetization
d) Shorten T1 relaxation - Correct Answer-Answer: b) Rephase dephased spins
Gradient echoes are formed by:
a) A 90° RF pulse followed by a 180° pulse
b) A single 180° RF pulse
c) The application of gradient reversal
d) Two consecutive 90° RF pulses - Correct Answer-Answer: c) The application of gradient
reversal
A gradient echo sequence differs from a spin echo sequence because it:
a) Uses a 180° refocusing pulse
b) Uses gradient fields to rephase spins
c) Eliminates the need for an RF pulse
d) Is only used in cardiac imaging - Correct Answer-Answer: b) Uses gradient fields to rephase
spin
Gradient echo sequences are generally more sensitive to:
a) T2-weighting
b) Susceptibility artifacts
Page 3 of 103
, c) Motion artifacts
d) Chemical shift - Correct Answer-Answer: b) Susceptibility artifacts
The primary advantage of gradient echo sequences over spin echo sequences is:
a) Higher signal-to-noise ratio (SNR)
b) Shorter scan times
c) Reduced T1 contrast
d) Greater immunity to magnetic field inhomogeneities - Correct Answer-Answer: b) Shorter
scan times
The flip angle in a gradient echo sequence typically:
a) Is always 90°
b) Ranges from 5° to 90°
c) Requires a 180° RF pulse
d) Has no effect on contrast - Correct Answer-Answer: b) Ranges from 5° to 90°
Which of the following sequences does not produce a true spin echo?
a) Turbo spin echo
b) Fast spin echo
c) Inversion recovery
d) Gradient echo - Correct Answer-Answer: d) Gradient echo
A T2-weighted image is typically obtained using:
Page 4 of 103
ARMRIT prep Exam Questions and Answers
Practice Questions with Solutions Newest |
Already Graded A+
What is the primary purpose of an MRI echo?
A) To generate magnetic field gradients
B) To allow for patient positioning
C) To re-emit RF energy for image acquisition
D) To prevent magnetic field inhomogeneities - Correct Answer-C
Which of the following is true about Spin Echo (SE) sequences?
A) They use a 90-degree RF pulse followed by a 180-degree refocusing pulse
B) They are more susceptible to magnetic field inhomogeneities than GRE
C) They do not require an RF refocusing pulse
D) They are primarily used for T1-weighted imaging only - Correct Answer-A
What is the role of the 180-degree RF pulse in a Spin Echo sequence?
A) It enhances T1 relaxation
B) It refocuses dephased spins to form an echo
C) It prevents T2* effects
D) It speeds up scan time - Correct Answer-B
Page 1 of 103
,Gradient Echo (GRE) sequences differ from Spin Echo (SE) sequences because:
A) They use a 180-degree RF refocusing pulse
B) They rely on gradient fields to rephase spins instead of an RF pulse
C) They eliminate all susceptibility effects
D) They do not require an RF excitation pulse - Correct Answer-B
In MRI, an echo is generated by:
a) The interaction of RF pulses with the patient's tissues
b) The refocusing of dephased spins
c) The application of a static magnetic field
d) The emission of X-rays - Correct Answer-Answer: b) The refocusing of dephased spins
The time between the initial RF pulse and the peak of the echo signal is called:
a) Repetition time (TR)
b) Echo time (TE)
c) Inversion time (TI)
d) Flip angle - Correct Answer-Answer: b) Echo time (TE)
The spin echo is produced by which sequence of RF pulses?
a) 180° → 90°
b) 90° → 180°
c) 180° → 90° → 180°
d) 90° → 180° → 90° - Correct Answer-Answer: b) 90° → 180°
Page 2 of 103
,The purpose of the 180° refocusing pulse in a spin echo sequence is to:
a) Suppress fat
b) Rephase dephased spins
c) Saturate the magnetization
d) Shorten T1 relaxation - Correct Answer-Answer: b) Rephase dephased spins
Gradient echoes are formed by:
a) A 90° RF pulse followed by a 180° pulse
b) A single 180° RF pulse
c) The application of gradient reversal
d) Two consecutive 90° RF pulses - Correct Answer-Answer: c) The application of gradient
reversal
A gradient echo sequence differs from a spin echo sequence because it:
a) Uses a 180° refocusing pulse
b) Uses gradient fields to rephase spins
c) Eliminates the need for an RF pulse
d) Is only used in cardiac imaging - Correct Answer-Answer: b) Uses gradient fields to rephase
spin
Gradient echo sequences are generally more sensitive to:
a) T2-weighting
b) Susceptibility artifacts
Page 3 of 103
, c) Motion artifacts
d) Chemical shift - Correct Answer-Answer: b) Susceptibility artifacts
The primary advantage of gradient echo sequences over spin echo sequences is:
a) Higher signal-to-noise ratio (SNR)
b) Shorter scan times
c) Reduced T1 contrast
d) Greater immunity to magnetic field inhomogeneities - Correct Answer-Answer: b) Shorter
scan times
The flip angle in a gradient echo sequence typically:
a) Is always 90°
b) Ranges from 5° to 90°
c) Requires a 180° RF pulse
d) Has no effect on contrast - Correct Answer-Answer: b) Ranges from 5° to 90°
Which of the following sequences does not produce a true spin echo?
a) Turbo spin echo
b) Fast spin echo
c) Inversion recovery
d) Gradient echo - Correct Answer-Answer: d) Gradient echo
A T2-weighted image is typically obtained using:
Page 4 of 103
