MRI Q_5: Some questions have a single correct solution (marked multiple choice),
ID: 270451 • Letter: M
Question
MRI Q_5: Some questions have a single correct solution (marked multiple choice), and some have several correct solutions (marked multiple answer).
1)Multiple Answer: In MRI the resonant frequency of a specific tissue is determined or affected by the:
A)Specific isotope being imaged
B)Characteristics of the molecule
C)Orientation of magnetic field
D)Strength of the magnetic field
2)Multiple Answer: T1 and T2 values depend on:
A)Voxel size.
B)Direction of magnetic field.
C)Type of tissue.
D)Molecular size.
3)Multiple Choice: Which of the following factors (in ms) would be most appropriate to produce a T1-weighted image? (ONE ANSWER)
A)TR = 2,000, TE = 20.
B)TR = 2,000, TE = 100.
C)TR = 500, TE = 20.
D)TR = 500, TE = 100.
4)Multiple Choice: What color is water in a T1 weighted MRI scan?
A)White
B)Dark gray
C)Black
D)Light gray
5)Multiple Choice: Which of these are different colors on T1 and T2 weighted MRI images?
A)Cortical bone
B)Flowing blood
C)Fat
D)None of the listed
6)Multiple Answer: The proton resonant frequency of tissue in MRI is determined by:
A)Type of tissue (fat, fluid).
B)Strength of magnetic field.
C)Direction of magnetic field.
D)T1 and T2 values.
Explanation / Answer
Answer: B, C and D
In MRI the resonant frequency of a specific tissue is determined or affected by the types of molecules, therefore different tissues shows different signal strength and orientation of the magnetic fields.