Mri RCE

Question 1

What distinguishes fatty tissue from water-based tissue in MRI imaging?

Answer 1

Fatty tissue appears bright on T1 images, while water-based tissue does not.

Brightness on T1 images indicates fluid-based tissue.

Question 2

Why does bone cortex appear black on MRI?

Answer 2

Bone cortex has no free protons.

This lack of protons results in no signal being emitted.

Question 3

What does abnormal brightness on T1 images indicate?

Answer 3

It indicates a disease process.

This can suggest pathology in the tissue being imaged.

Question 4

What is the purpose of MRI in medical procedures?

Answer 4

MRI is used for imaging in both medical and non-medical procedures.

It can provide detailed images of organs and tissues.

Question 5

What does the acronym TR stand for in MRI terminology?

Answer 5

Repetition Time.

It is the time between successive pulse sequences.

Question 6

What does the acronym TE stand for in MRI terminology?

Answer 6

Time to Echo.

It is the time between the delivery of the RF pulse and the receipt of the echo signal.

Question 7

What are the key characteristics of T1-weighted imaging?

Answer 7

Short TE and TR times, contrast determined by T1 properties of tissue.

T1 imaging is useful for assessing anatomy and pathology.

Question 8

What are the key characteristics of T2-weighted imaging?

Answer 8

Longer TE and TR times, contrast and brightness determined by T2 properties of tissue.

T2 imaging is better for highlighting fluid and edema.

Question 9

What does FLAIR stand for in MRI imaging?

Answer 9

Fluid Attenuated Inversion Recovery.

FLAIR sequences are used to suppress fluid signals.

Question 10

What is the main contrast agent used in MRI?

Answer 10

Gadolinium.

Gadolinium enhances the T1 signal in tissues.

Question 11

What is the function of fat saturation in MRI?

Answer 11

It suppresses signals from fat tissues to enhance visibility of other structures.

This technique is useful for differentiating tissues.

Question 12

What is the significance of the flip angle in MRI?

Answer 12

It is the angle at which the magnetic field is applied to protons in the body.

The flip angle affects the contrast and signal strength in the images.

Question 13

How does field of view (FOV) relate to pixel size in MRI?

Answer 13

Pixel Size = FOV / Matrix Size.

This calculation determines the resolution of the image.

Question 14

What is compressed sensing in MRI?

Answer 14

A technique to accelerate acquisition of MRI data while maintaining image quality.

It reduces scan time without compromising detail.

Question 15

What does echo train length impact in MRI?

Answer 15

It impacts image acquisition time and quality.

Longer echo trains can reduce scan time while retaining resolution.

Question 16

What is the purpose of deep resolve in MRI?

Answer 16

It combines deep learning and AI techniques to enhance MRI processes.

This can improve image quality and efficiency.

Question 17

What does the term ‘concatenations’ refer to in MRI?

Answer 17

Uniformly distributing slices across multiple TRs.

This helps in optimizing the scan protocol.

Question 18

Fill in the blank: The _______ is the time between the delivery of the RF pulse and the receipt of the echo signal.

Answer 18

Time to Echo (TE).

TE is crucial for determining the timing of image acquisition.

Question 19

How are MRI signals created?

Answer 19

MRI scanner interacts with protons. Randomlyorientated protons became aligned duith the magnetic held. A repeating sequence of radio frequency (rf) pulses causes ‘excitations and resonance as of protons. As each rf pulse is removed, protons