Presentation is loading. Please wait.

Presentation is loading. Please wait.

Introduction to MRI Magnetic Resonance Imaging. Bore 1.5-3.0 Tesla Super conductive Magnet, RF coils.

Similar presentations


Presentation on theme: "Introduction to MRI Magnetic Resonance Imaging. Bore 1.5-3.0 Tesla Super conductive Magnet, RF coils."— Presentation transcript:

1 Introduction to MRI Magnetic Resonance Imaging

2 Bore Tesla Super conductive Magnet, RF coils

3

4 Understanding and Reading MRIs

5 How is this MRI Image produce?

6

7

8

9

10 Numbers

11 Transforming Radio Frequencies into Images? Let’s step back, and look at a device that is familiar to all of us…the Radio

12

13 Encoded RF “1060 on your dial” RF decoded

14 X / 5mm slice of tissue

15 Setting up the Machine

16 Surface coil

17

18 Reading the Images

19 The emitted energy of the protons once the RF is stopped is affected by in which tissue (the “ lattice ”) it resides: fat, muscle, ligament, bone, brain, etc.

20 RF Pulse sequence parameters which the technician adjusts The three pulse sequence parameters are Repetition time (TR) measured in msec Echo time (TE) measured in msec Flip angle measured in degrees

21

22

23 T1 and T2 relaxation times Occur simultaneously and independently of each other and form the basis of tissue contrast in MR- reconstructed images

24 T1 Low TR ( msec) Low TE (20-40 msec) T2 High TR (2,000-3,000 msec) High TE (40-70 msec) Proton density High TE (2,000-3,000msec) Low TE (20-40 msec)

25 Basic Sequences T1 to view anatomy T2 to detect a pathologic process (edema, swelling) Proton Density (PD) great for ligamentous anatomy

26 Basic Pulse Sequences for MRI Imaging Image typeFatWaterAdvantage T1BrightDark Anatomical detail T2 Intermediate Bright ++ edema Fat Suppressed T2 Very DarkVery Bright ++++ edema

27

28

29 Fat Suppression A very valuable tool to define whether a structure is composed of water (bright) such as blood or fat (bone marrow)

30 TI Fat Water

31 T2 Fat Water FatWater IntermediateBright

32 T2 Fat Suppressed Water Fat

33 Proton Density Fat Suppressed (PD-S) FAT Water


Download ppt "Introduction to MRI Magnetic Resonance Imaging. Bore 1.5-3.0 Tesla Super conductive Magnet, RF coils."

Similar presentations


Ads by Google