The Magnetic Resonance Imaging Process

Outline

Mind Map

Learning Objectives

Teaching Visuals

Online Module
(Requires Enrollment)

Text Reference

 

Outline and Learning Guide


INTRODUCTION AND OVERVIEW

k Space

Acquisition

Reconstruction

IMAGING PROTOCOL

IMAGING METHODS

THE IMAGING CYCLE

TR

TE

Excitation

The Echo Event and Signals

CONTRAST SENSITIVITY

T1 Contrast

Proton Density (PD) Contrast

T2 Contrast

MIND MAP and SUMMARY

 

 

Learning Objectives

Briefly compare the functions of the acquisition and the reconstruction phases of the MR imaging process.

Explain and illustrate the concept of k space and it's general construct

Describe the composition of the MR image acquisition process with respect to imaging cycles.

Identify the two major factors associated with the imaging cycles that determine the time required for a complete image acquisition.

Give a general comparison of the times required for the acquisition and reconstruction phases of a typical MR imaging procedure.

Identify the major imaging issues that must be considered when selecting or adjusting an imaging protocol for a specific clinical procedure.

Explain why the different MR imaging methods are also often referred to as the pulse sequences.

Identify the factor that determines if a specific method is a spin-echo or a gradient-echo method.

Name the two major imaging methods that belong to the spin-echo family of methods
.
Name two general imaging methods that belong to the gradient-echo family of methods.

Explain and illustrate the relationship of the time interval, TR, to the longitudinal magnetization phase of the imaging cycle.

Explain and illustrate the relationship of the time interval, TE, to the transverse magnetization phase of the imaging cycle

Describe the relationship of the two events, excitation and the echo event, to the time interval, TE.

Describe the general steps that must be taken to adjust the contrast sensitivity of an image acquisition to produce an image with a specific (T1, T2, etc.) weighting.

Identify the time interval during the imaging cycle and describe the condition of the tissue magnetization when the T1 contrast is formed.

Identify the time interval during the imaging cycle and describe the condition of the tissue magnetization when the T2

Identify the time interval during the imaging cycle and describe the condition of the tissue magnetization when the proton density (PD) contrast is formed.

 Explain and illustrate how changing the time interval, TR, affects the type of image contrast that will be produced.

 Explain and illustrate how changing the time interval, TE, affects the type of image contrast that will be produced.

 

Text Reference

Chapter 5

Magnetic Resonance Imaging: Principles, Methods, and Techniques
Medical Physics Publishing,  http://www.medicalphysics.org

 

 

Mind Map