PHYS/BIOL 464 Medical Imaging Instrumentation MRI HW 7A 1.During the magnetic resonance relaxation process after a 90Â° pulse: A, Longitudinal...

90.2K

Verified Solution

Question

Physics

PHYS/BIOL 464 Medical ImagingInstrumentation
MRI HW 7A
1.During the magnetic resonance relaxation process after a 90Â°pulse:
A, Longitudinal magnetization increases
B. Transverse magnetization increases
C. Proton density increases
2. T1 and T2 values depend on:
A. Voxel size.
B. Direction of magnetic field.
C. Type of tissue.
3.Tissue characteristics which can produce a relative andincreased intensity (brightness) contrast in a magnetic resonanceimage include which of the two following factors (choose two):
A. Short T1 values.
B. Long T1 values.
C. Short T2 values.
D. Long T2 values.
4. The process of averaging is used in MRI for the purposeof:
A. Reducing acquisition time.
B. Reducing image noise.
C. Improving detail.
D. Combining T1 and T2 contrast.
5. The amount of time necessary to acquire an MR image dependson which two factors (choose two):
A. TR
B. TE
C. Field of view
D. Matrix size
6. T1 increases with magnetic field.
A. True
B. False

Answer & Explanation Solved by verified expert

3.9 Ratings (424 Votes)

1 During the magnetic resonance relaxation process after a 90 pulse a Longitudinal magnetization increases Yes b Transverse magnetization increases No c Proton density increases No Discussion There are two phases to the relaxation process See Answer

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member