MRI

Question 1

MRI Basic sequences are

Answer 1

1. T1 weighted+contrast
2. T2 Weighted
3. Proton weighted

Question 2

Fluids like CSF and ascites and most of the soft tissues appear hyperdense in which kind of MRI?

Answer 2

T2 basic sequence

Question 3

The main difference between T1 and T2 is…

Answer 3

FLUIDS

Question 4

In MRI, best to diagnose fat containing tumors is

Answer 4

STIR

Question 5

Examples of inversion recovery sequence In MRI…

Answer 5

1. FLAIR (Null Fluid)
2. STIR (Null Fat)

Question 6

Very fast MRI that can be used in Dynamic examinations like dynamic liver exam is

Answer 6

Gradient Echo

Question 7

Excellent for fluid filled structures
عاوز أوضح الfluid

Answer 7

Heavy H2 weighted images

Question 8

An example of Heavy H2 weighted images..

Answer 8

MRCP مركب

Question 9

Based in measurement of the random motion of the water molecules in the inter cellular space “extracellular fluid” Brownian movement..

Answer 9

Diffusion weighted imaging

Question 10

Restricted diffusion gives… signal while free diffusion gives…

Answer 10

1. Rest. Gives high signal
2. Free gives no signal like cysts and benign lesions

Question 11

Explores the chemical composition of the tissue by markers of the disease…

Answer 11

Advanced MRS Spectroscopy

Question 12

Perfusion imaging evaluate blood flow and vascularity used for grading tumors

Answer 12

Advanced MRI Perfusion