SPINNING ACTUAL TEST FULL QUESTIONS
AND CORRECT ANSWERS EXAMPREP
STUDY SHEET
●● T1 relaxation refers to ____ relaxation.
a. spin-spin
b. longitudinal
c. phase
d. transverse
Answer: b.
●● Which of the following statements is false?
a. T1 relaxation refers to longitudinal recovery of magnetization while
T2 relaxation refers to the transverse decay of magnetization
b. T1 relaxation and T2 relaxation occur simultaneously
c. echoes collected in the transverse plane demonstrate only T2
relaxation differences
d. T2 relaxation occurs much more quickly than T1 relaxation
Answer: c.
,●● If the precessional frequency of the patient's protons is
approximately 21 MHz, what magnetic field strength is being
experienced by the patients protons?
Answer: Larmor frequency equation
W0= B0 x Y
21= 42.6 x (X)
21/42.6 = .4929 (round) = 0.5T
●● Which of the following is the definition of T1 relaxation?
a. the time is takes the net longitudinal magnetization of protons to grow
63% of its final amplitude
b. the time at which is takes the transverse magnetization has decayed
63% of its full value
Answer: a.
●● Based on the graph of longitudinal relaxation shown above, which of
the following would have the brightest signal intensity on T1 image?
a. bone marrow
,b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Answer: a.
●● Based on the graph of longitudinal relaxation shown above, which of
the following would have the shortest T1 relaxation time?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Answer: a.
●● The edema associated with pathology in the brain has a much longer
T2 relaxation time than surrounding normal brain tissue. On a T2 image,
what does this result in?
a. isointense between edema and surrounding normal brain tissue
, b. a low signal intensity in the area of edema
c. a signal void in the area of edema
d. a high signal intensity in the area of edema
Answer: d.
●● Which of the following dephasing mechanisms affects the size of the
resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
Answer: d.
●● After a 90 RF pulse, if three 180 RF pulses are applied to generate
three echoes, which of the following is responsible for the third echo
being much smaller than the first echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
Answer: d.
AND CORRECT ANSWERS EXAMPREP
STUDY SHEET
●● T1 relaxation refers to ____ relaxation.
a. spin-spin
b. longitudinal
c. phase
d. transverse
Answer: b.
●● Which of the following statements is false?
a. T1 relaxation refers to longitudinal recovery of magnetization while
T2 relaxation refers to the transverse decay of magnetization
b. T1 relaxation and T2 relaxation occur simultaneously
c. echoes collected in the transverse plane demonstrate only T2
relaxation differences
d. T2 relaxation occurs much more quickly than T1 relaxation
Answer: c.
,●● If the precessional frequency of the patient's protons is
approximately 21 MHz, what magnetic field strength is being
experienced by the patients protons?
Answer: Larmor frequency equation
W0= B0 x Y
21= 42.6 x (X)
21/42.6 = .4929 (round) = 0.5T
●● Which of the following is the definition of T1 relaxation?
a. the time is takes the net longitudinal magnetization of protons to grow
63% of its final amplitude
b. the time at which is takes the transverse magnetization has decayed
63% of its full value
Answer: a.
●● Based on the graph of longitudinal relaxation shown above, which of
the following would have the brightest signal intensity on T1 image?
a. bone marrow
,b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Answer: a.
●● Based on the graph of longitudinal relaxation shown above, which of
the following would have the shortest T1 relaxation time?
a. bone marrow
b. intervertebral disk
c. CSF
d. muscle
(post test 1; page 1)
Answer: a.
●● The edema associated with pathology in the brain has a much longer
T2 relaxation time than surrounding normal brain tissue. On a T2 image,
what does this result in?
a. isointense between edema and surrounding normal brain tissue
, b. a low signal intensity in the area of edema
c. a signal void in the area of edema
d. a high signal intensity in the area of edema
Answer: d.
●● Which of the following dephasing mechanisms affects the size of the
resulting spin echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
Answer: d.
●● After a 90 RF pulse, if three 180 RF pulses are applied to generate
three echoes, which of the following is responsible for the third echo
being much smaller than the first echo?
a. magnetic field inhomogenities
b. phase effects of chemical shift
c. magnetic susceptibility
d. spin-spin interactions
Answer: d.
