MR Angiography: Basic Principles, Techniques and Clinical Application

This video will focus on current techniques used to acquire MR Angiography (MRA) studies which do not require the IV injection of a gadolinium-based contrast media as well as those contrast-enhanced studies requiring the use of a gadolinium-based MR contrast agent.  The basics behind the normal appearance of flow on both spin echo and gradient echo techniques will be explained.  The video also describes the basic principles and concepts of time-of-flight as well as phase contrast techniques. This video will present the current techniques to acquire Contrast Enhanced MR Angiography (MRA) studies. The basic differences and similarities between the various types of  GBCAs will be explained.  The video also describes the basic principles and concepts of acquiring contrast enhanced MRA studies.  A review of peer-reviewed journal articles focusing on GBCAs is included.

This video will focus on current techniques to acquire both non-contrast and contrast-enhanced MR Angiography studies. The viewer should be able to:

  • Explain how flow appears on spin echo and gradient echo sequences
  • Name the basic contrast mechanisms for both time-of-flight and phase contrast techniques
  • Name the major advantages of 2D TOF as well as the major disadvantages
  • Name the major advantages of 3D TOF as well as the major disadvantages
  • Name the major advantages of phase contrast techniques
  • Name the major disadvantages of phase contrast techniques
  • Describe the major differences between the types of gadolinium-based MR contrast agents
  • Name the benefits of contrast enhanced MRA
  • Name the types of techniques used to time the arrival of the bolus of contrast with the acquisition of the low frequency k-space data
  • Calculate the weight-based dose of a contrast agent based on the molar concentration
  • Describe the relationship between the relaxivity of an agent and the required dose
  • Technologists interested in MRA.
  • Technologists who have never had any formal education in MRA principles.
  • Molecular Imaging Technologists or CT Technologists who may be cross-training into MRA.

This program has been approved for 1.0 hour of Category A CE credit as designated by the Society for MR Radiographers & Technologists (SMRT) RCEEM. Please Note:  If This activity was previously offered within a combined CE Module it cannot be used again in this or any subsequent biennium. Additionally, this activity may be available in multiple formats or from different sponsors.  ARRT regulations state that an individual may not repeat an activity for credit if it was reported in the same or any subsequent biennium.   Release Date: 5/02/2017 Expiration Date: 5/01/2018

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