1. The advantage of FLAIR is most likely that it: a) Cancels fat in the image...

1. The advantage of FLAIR is most likely that it:

a) Cancels fat in the image

b) Cancels water in the image

c) Cancels white matter in the image

d) Allows for quick imaging of large volumes

e) Uses gradients for spatial localization

2. Typical soft tissue differences (%) in spin density are most likely:

a) Less than 1

b) 3

c) 10

d) 30

e) 100

Solutions

Expert Solution

Answer 01 :- B is the correct option

Description of answer:- Fluid Attenuated Inversion Recovery is an MRI sequence with an inversion recovery Set Null Fluid.

It can be used brain imaging to cancel water / CSF effects on the image .

In CSF suppression, one aims for T1 weighted image which priorities the signal of fat over that of water .

That's why if the long T1 ( inversion time is adjusted to zero crossing point of water so none of its signal is visible and the signal of CSF should be erased.

Answer :02 Option A is the correct answer

Description :-Spin density is a electron density applied to free radicals. It is defined as the total electrons of one spin minus the total electrons density of electrons of the others spin and that is less than 1% on soft tissues.

Soft tissues difference typically less than 1% because magentaic resonance particularly sensitive to assessing soft tissues for the detection and diagnosis a broad range of pathological conditions .

Nightingale answered 1 week ago

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