Welcome to Classifications and Online Calculators in Radiology

This site was build along with the Atlas of Radiology Images to support your knowledge in radiology.

You will find here:

that are used in radiology and related fields with free access.

Moreover:

  • Some pages are accompanied by illustrations
  • All pages contain tags for easy navigation
 

The concept

The concept of this website is based on a previous site that was founded in 2008 and is still up and running. The website is composed as a book, where all sources are properly referenced, according to a good practice in scientific publications.

Didn't find a classification?

 

    Featured page

    Intervertebral disc degeneration in lumbar spine - MRI classification by Pfirrmann et al.

    The Pfirrmann classification was developed in 2001 and was based on previous systems. It was validated on 60 MRI examinations of the lumbar spine assessed by three independent observers. The imaging protocol included sagittal T1 weighted spin-echo, T2 weighted fast spin echo (FSE) in sagittal and axial plane.

    Grade Structure Distinction of nucleus pulposus and anulus fibrosus Signal intensity on T2 weighted images Height of intervertebral disc
    Grade I
    • homogeneous
    • bright white
    		 clear hyperintense, isointese to cerebrospinal fluid normal
    Grade II
    • inhomogeneous
    • horizontal bands may be present
    		 clear hyperintense, isointese to cerebrospinal fluid normal
    Grade III
    • inhomogeneous
    • gray
    		 unclear intermediate normal to slightly decreased
    Grade IV
    • inhomogeneous
    • gray to black
    		 lost intermediate to hypointense normal to moderately decreased
    Grade V
    • inhomogeneous
    • black
    		 lost hypointense collapsed disc space

    References:

    1. Pfirrmann CW, Metzdorf A, Zanetti M, Hodler J, Boos N. Magnetic resonance classification of lumbar intervertebral disc degeneration. Spine. 2001 Sep 1;26(17):1873–8.

    Updated 13/8/2013 17:48 by Lambert
    See the page
    Syndicate content