MRI Physics Quiz 4 Questions And Answers
2025
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128 and 128 - Correct Answer-If a phase matrix of 128 is selected, how many lines and
how many TR's must be completed to finish the scan
Y - Correct Answer-In coronal imaging, which gradient is usually used for slice
selection?
Right to left - Correct Answer-For K space filling in a gradient echo sequence, when the
frequency encoding gradient is negative, K space is traversed from?
False - Correct Answer-The Y gradient alters the field of strength along the X-axis
(horizontal) of the magnet?
Phase Matrix
Repetition Time - Correct Answer-Select all of the following which affect scan time
Z - Correct Answer-In body imaging, in coronal and sagittal images, the long axis of the
anatomy lies in which axis of the magnet to perform frequency encoding?
False - Correct Answer-The duration of readout gradient is called the sampling rate or
sampling frequency
True - Correct Answer-Because K-space is symmetrical, we can sometimes choose to
fill only a part of k-space and then calculate the remaining data of actually scanning it
It is a process of creating a gradient field which thus creates a gradient in precessional
frequencies of the hydrogen protons across the field. While this gradient field is applied,
RF is applied at a precise frequency and range that correlates with the location of the
tissue volume of interest - Correct Answer-Select the best description below of how
close selection works.
True - Correct Answer-In order to form a recognizable image, k-space must always be
filled partially or completely in some way or another
Slope of slice select gradient
Bandwidth of transmitted RF - Correct Answer-Which TWO factors from the following
list affect slice thickness?
2025
Save
128 and 128 - Correct Answer-If a phase matrix of 128 is selected, how many lines and
how many TR's must be completed to finish the scan
Y - Correct Answer-In coronal imaging, which gradient is usually used for slice
selection?
Right to left - Correct Answer-For K space filling in a gradient echo sequence, when the
frequency encoding gradient is negative, K space is traversed from?
False - Correct Answer-The Y gradient alters the field of strength along the X-axis
(horizontal) of the magnet?
Phase Matrix
Repetition Time - Correct Answer-Select all of the following which affect scan time
Z - Correct Answer-In body imaging, in coronal and sagittal images, the long axis of the
anatomy lies in which axis of the magnet to perform frequency encoding?
False - Correct Answer-The duration of readout gradient is called the sampling rate or
sampling frequency
True - Correct Answer-Because K-space is symmetrical, we can sometimes choose to
fill only a part of k-space and then calculate the remaining data of actually scanning it
It is a process of creating a gradient field which thus creates a gradient in precessional
frequencies of the hydrogen protons across the field. While this gradient field is applied,
RF is applied at a precise frequency and range that correlates with the location of the
tissue volume of interest - Correct Answer-Select the best description below of how
close selection works.
True - Correct Answer-In order to form a recognizable image, k-space must always be
filled partially or completely in some way or another
Slope of slice select gradient
Bandwidth of transmitted RF - Correct Answer-Which TWO factors from the following
list affect slice thickness?
