MRI ARMRIT Exam Questions Version 3 /MRI
ARMRIT prep Exam Questions and Answers
Practice Questions with Solutions Newest |
Already Graded A+
A pulse sequence with a given set of parameters allows a maximum of 20 slices. If 2 saturation
pulses are then added, the:
a. TE would decrease
b. maximum number of slices would decrease
c. scan time would decrease
d. maximum number of slices would remain the same - Correct Answer-b.
When gradient moment nulling is added to a pulse sequence and all other parameters are
unchanged, the:
a. minimum echo time may be increased
b. scan time may be decreased
c. size of the displayed anatomy may be decreased
d. SAR of the sequence may be increased - Correct Answer-a.
Which of the following is TRUE regarding an ECG triggered sequence?
1. the contrast of the resulting images is independent of the patient's R-R interval
2. ECG triggering is unaffected by an irregular heart rate
3. ECG triggering will not remove the respiratory artifact on sagittal lumbar spine images -
Correct Answer-1 and 3
Page 1 of 122
,If we also want to rephase the signal from protons that have more complex motion, extra ____
must be added to a standard gradient moment nulling gradient waveform which rephases the
signal from protons with a constant velocity.
a. 90 RF pulses
b. gradient pulses
c. spoilers
d. 180 RF pulses - Correct Answer-b.
If two saturation regions are applied during a dual contrast fast spin echo study for lumbar
spine, how many 90 RF pulses are applied during a single repetition, for a given slice?
a. 2
b. 3
c. 4 - Correct Answer-b
each saturation pulse usually consists of a single 90 RF pulse
The addition of which of the following motion compensation techniques increases the specific
absorption rate of the sequence?
a. pule triggering
b. saturation pulses
c. respiratory gating
d. gradient moment nulling - Correct Answer-b.
Page 2 of 122
,Which of the following techniques would be ineffective at reducing motion artifacts created by
blood flowing through the sagittal sinus?
a. fat saturation
b. saturation pulses
c. flow compensation
d. ECG triggering - Correct Answer-a.
Which of the following statements is FALSE regarding a sequence with gradient moment
nulling?
a. a sequence with gradient moment nulling utilizes extra gradients to rephase the signal from
moving protons
b. a sequence with gradient moment nulling generally tends to be effective in reducing CSF
pulsation artifact in the cervical spine
c. a sequence with gradient moment nulling only rephases moving protons, not stationary
protons
d. when using a sequence with gradient moment nulling, vessels generally appear bright,
provided that there is a blood flow - Correct Answer-c.
In what orientation and position should a saturation region be located in order to eliminate
blood flow from transverse images of the cervical spine?
a. transverse, superior to the region interest
b. coronally, anterior to the spine
c. coronally, posterior to the spine
d. transverse, inferior to the region of interest - Correct Answer-d.
Page 3 of 122
, Which of the following techniques has no effect upon the scan time?
a. respiratory triggering
b. respiratory gating
c. respiratory compensation
d. the scan time of all three techniques is the same and is patient dependent - Correct Answer-
c.
Which of the following is TRUE regarding respiratory compensation?
a. respiratory compensation greatly increases scan time
b. respiratory compensation uses extra RF pulses to eliminate signal from unwanted anatomy
c. respiratory compensation reorders the filling of the rawdata
d. respiratory compensation never is used for liver studies - Correct Answer-c.
The spoiler after a 90 saturation pulse ____ magnetization.
a. rephases transverse
b. dephases the londitudinal
c. phases longitudinal
d. dephases the transverse - Correct Answer-d.
Which one of the following is a reason that a positive gradient followed by an equal negative
gradient yields a net phase if the protons are moving?
1. the effect of a positive gradient pulse is not equal and opposite to the effect of a negative
gradient pulse because the protons are moving
2. moving protons will always have net phase, regardless of the type of gradient pulses applied
Page 4 of 122
ARMRIT prep Exam Questions and Answers
Practice Questions with Solutions Newest |
Already Graded A+
A pulse sequence with a given set of parameters allows a maximum of 20 slices. If 2 saturation
pulses are then added, the:
a. TE would decrease
b. maximum number of slices would decrease
c. scan time would decrease
d. maximum number of slices would remain the same - Correct Answer-b.
When gradient moment nulling is added to a pulse sequence and all other parameters are
unchanged, the:
a. minimum echo time may be increased
b. scan time may be decreased
c. size of the displayed anatomy may be decreased
d. SAR of the sequence may be increased - Correct Answer-a.
Which of the following is TRUE regarding an ECG triggered sequence?
1. the contrast of the resulting images is independent of the patient's R-R interval
2. ECG triggering is unaffected by an irregular heart rate
3. ECG triggering will not remove the respiratory artifact on sagittal lumbar spine images -
Correct Answer-1 and 3
Page 1 of 122
,If we also want to rephase the signal from protons that have more complex motion, extra ____
must be added to a standard gradient moment nulling gradient waveform which rephases the
signal from protons with a constant velocity.
a. 90 RF pulses
b. gradient pulses
c. spoilers
d. 180 RF pulses - Correct Answer-b.
If two saturation regions are applied during a dual contrast fast spin echo study for lumbar
spine, how many 90 RF pulses are applied during a single repetition, for a given slice?
a. 2
b. 3
c. 4 - Correct Answer-b
each saturation pulse usually consists of a single 90 RF pulse
The addition of which of the following motion compensation techniques increases the specific
absorption rate of the sequence?
a. pule triggering
b. saturation pulses
c. respiratory gating
d. gradient moment nulling - Correct Answer-b.
Page 2 of 122
,Which of the following techniques would be ineffective at reducing motion artifacts created by
blood flowing through the sagittal sinus?
a. fat saturation
b. saturation pulses
c. flow compensation
d. ECG triggering - Correct Answer-a.
Which of the following statements is FALSE regarding a sequence with gradient moment
nulling?
a. a sequence with gradient moment nulling utilizes extra gradients to rephase the signal from
moving protons
b. a sequence with gradient moment nulling generally tends to be effective in reducing CSF
pulsation artifact in the cervical spine
c. a sequence with gradient moment nulling only rephases moving protons, not stationary
protons
d. when using a sequence with gradient moment nulling, vessels generally appear bright,
provided that there is a blood flow - Correct Answer-c.
In what orientation and position should a saturation region be located in order to eliminate
blood flow from transverse images of the cervical spine?
a. transverse, superior to the region interest
b. coronally, anterior to the spine
c. coronally, posterior to the spine
d. transverse, inferior to the region of interest - Correct Answer-d.
Page 3 of 122
, Which of the following techniques has no effect upon the scan time?
a. respiratory triggering
b. respiratory gating
c. respiratory compensation
d. the scan time of all three techniques is the same and is patient dependent - Correct Answer-
c.
Which of the following is TRUE regarding respiratory compensation?
a. respiratory compensation greatly increases scan time
b. respiratory compensation uses extra RF pulses to eliminate signal from unwanted anatomy
c. respiratory compensation reorders the filling of the rawdata
d. respiratory compensation never is used for liver studies - Correct Answer-c.
The spoiler after a 90 saturation pulse ____ magnetization.
a. rephases transverse
b. dephases the londitudinal
c. phases longitudinal
d. dephases the transverse - Correct Answer-d.
Which one of the following is a reason that a positive gradient followed by an equal negative
gradient yields a net phase if the protons are moving?
1. the effect of a positive gradient pulse is not equal and opposite to the effect of a negative
gradient pulse because the protons are moving
2. moving protons will always have net phase, regardless of the type of gradient pulses applied
Page 4 of 122
