MRI 2
29 Questions
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Questions and Answers
- 1.At a field strength of 1.0 tesla, the approximate T2 relaxation time for grey matter is what?
- A.
100MS
- B.
80MS
- C.
90MS
- 2.In a T2 weighted image, CSF has a ________ T2 relaxation time and therefore appears _______.
- A.
Long, Bright
- B.
Long, Dark
- C.
Short, Dark
- D.
Short, Bright
- 3.At a field strength of 1.0 tesla, the approximate T2 relaxation time for renal cortex tissue is what?
- A.
45MS
- B.
50MS
- C.
60MS
- D.
70MS
- 4.At a field strength of 1.0 tesla, the approximate T2 relaxation time for spleen tissue is what?
- A.
60MS
- B.
80MS
- C.
90MS
- D.
100MS
- 5.When the phase encoding gradient is activated, steep slopes produce what type of signal amplitude?
- A.
LOW
- B.
HIGH
- C.
MEDIUM
- D.
STRONG
- 6.A 180 degree RF pulse is used to ______ the dephasing net vector in the transverse plane.
- A.
MAGNETIZE
- B.
REFOCUS
- C.
DECAY
- D.
DELAY
- 7.At a field strength of 1.0 tesla, the approximate T1 relaxation time for CSF is what?
- A.
800MS
- B.
1000MS
- C.
2000MS
- D.
2500MS
- 8.At a field strength of 1.0 tesla, the approximate T2 relaxation time of fat is what?
- A.
40
- B.
50
- C.
80
- D.
90
- 9.During the acquisition of axial images of the body with the phase direction A/P, frequency encoding is performed by which physical gradient?
- A.
X
- B.
Y
- C.
Z
- 10.At a field strength of 1.0 tesla, the approximate T1 relaxation time for muscle tissue is what?
- A.
270
- B.
480
- C.
600
- D.
680
- 11.In a T1 weighted image, a short TR is used to do what?
- A.
MAX T2
- B.
MIN T2
- C.
MAX T1
- D.
MIN T2
- 12.At a field strength of 1.0 tesla, the approximate T2 relaxation time for renal medulla tissue is what?
- A.
90
- B.
100
- C.
140
- D.
300
- 13.During the acquisition of axial images of the body with the frequency direction L/R, phase encoding is performed by which physical gradient?
- A.
X
- B.
Y
- C.
Z
- 14.In a T2 weighted image, tissues with long T2 relaxation times appear ______.
- A.
HYPERINTENSE
- B.
HYPOINTENSE
- C.
ISOINTENSE
- 15.
- A.
X
- B.
Y
- C.
Z
- 16.The range of frequencies that is sampled during frequency encoding is known as what?
- A.
RECIEVE BANDWITH
- B.
TRANSMIT BANDWITH
- C.
GRADIENT SLOPE
- D.
RF SLOPE
- 17.The Y gradient alters the magnetic field strength along which axis?
- A.
HORIZONTAL
- B.
VERTICAL
- C.
LONG
- D.
SHORT
- 18.During slice selection, the Y gradient is used to select slices in which plane?
- A.
CORONAL
- B.
AXIAL
- C.
SAGITTAL
- 19.At a field strength of 1.0 tesla, the approximate T1 relaxation time for spleen tissue is what?
- A.
360
- B.
380
- C.
400
- D.
480
- 20.At a field strength of 1.0 Tesla, the approximate T1 relaxation time for blood is what?
- A.
540
- B.
680
- C.
800
- D.
1000
- 21.The image parameter that primarily affects T1 weighting is known as what
- A.
TE
- B.
TR
- C.
IR
- 22.At a field strength of 1.0 tesla, the approximate T1 relaxation time for renal medulla tissue is what?
- A.
520
- B.
600
- C.
680
- D.
800
- 23.At a field strength of 1.0 tesla, the approximate T1 relaxation time for renal cortex tissue is what?
- A.
80
- B.
270
- C.
360
- D.
390
- 24.The X gradient alters the magnetic field strength along which axis
- A.
HORIZONTIAL
- B.
VERTICAL
- C.
LONG
- D.
SHORT
- 25.The time between the 90 degree RF pulse and the spin echo signal in a spin echo pulse sequence is known as what?
- A.
TR
- B.
TE
- C.
INVERSION TIME
- D.
RELAXATION TIME
- 26.In a 1.0 tesla magnet, the difference in the precessional frequency between fat and water is what?
- A.
130
- B.
147
- C.
200
- D.
220
- 27.During the acquisition of axial images of the brain with the frequency direction A/P, phase encoding is performed by which physical gradient?
- A.
X
- B.
Y
- C.
Z
- 28.The signal created after applying a 90 degree RF pulse is known as what?
- A.
FID
- B.
GRADIENT ECHO SIGNAL
- C.
SPIN ECHO SIGNAL
- D.
SPIN SPIN SIGNAL
- 29.The image parameter that primarily affects T2 weighting is known as what?
- A.
TR
- B.
TE
- C.
INVERSION TIME
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