# Magnetic Resonance Imaging - MRI

<mark style="color:$danger;">**This Editorial Guide is used for Education Purposes Only. It is used in the Authoring Courses and Certifications. It is based on the January 2026 Editorial Guide.**</mark>

{% hint style="info" %}
**Exception**

MRI and MR are exceptions to the rule that all abbreviations should have their expanded form in parentheses in descriptions.
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## Magnetic resonance imaging

Descriptions:

* FSN: Magnetic resonance imaging of X (procedure)
* PT: MRI of X
* SYN: Magnetic resonance imaging of X
  * For example,
    * 6007000 | Magnetic resonance imaging of chest (procedure)|
      * FSN: Magnetic resonance imaging of chest (procedure)
      * PT: MRI of chest
      * SYN: Magnetic resonance imaging of chest

## Magnetic resonance angiography

Descriptions:

* FSN: Magnetic resonance angiography of X (procedure)
* PT: Magnetic resonance angiography of X
* SYN: Magnetic resonance angiogram of X
* SYN: MR angiography of X
  * For example,
    * 432103005 | Magnetic resonance angiography of carotid artery (procedure)|
      * FSN: Magnetic resonance angiography of carotid artery (procedure)
      * PT: Magnetic resonance angiography of carotid artery
      * SYN: Magnetic resonance angiogram of carotid artery
      * SYN: MR angiography of carotid artery

## Magnetic resonance venography

Descriptions:

* FSN: Magnetic resonance venography of X (procedure)
* PT: Magnetic resonance venography of X
* SYN: Magnetic resonance venogram of X
* SYN: MR venography of X
  * For example,
    * 21101000087100 | Magnetic resonance venography of limb (procedure)|
      * FSN: Magnetic resonance venography of limb (procedure)
      * PT: Magnetic resonance venography of extremity
      * SYN: Magnetic resonance venography of limb

## Magnetic resonance arthrography

Descriptions:

* FSN: Magnetic resonance arthrography of X (procedure)
* PT: Magnetic resonance arthrography of X
* SYN: Magnetic resonance arthrogram of X
* SYN: MR arthrography of X
  * For example,
    * 19741000087109 | Magnetic resonance arthrography of right knee (procedure)|
      * FSN: Magnetic resonance arthrography of right knee (procedure)
      * PT: Magnetic resonance arthrography of right knee
      * SYN: MR arthrography of right knee

## Magnetic resonance spectroscopy

Descriptions:

* FSN: Magnetic resonance spectroscopy of X (procedure)
* PT: Magnetic resonance spectroscopy of X
* SYN: MR spectroscopy of X
  * For example,
    * 1137352004 | Magnetic resonance spectroscopy of liver (procedure)|
      * FSN: Magnetic resonance spectroscopy of liver (procedure)
      * PT: Magnetic resonance spectroscopy of liver
      * SYN: MR spectroscopy of liver

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