Welcome to Classifications and Online Calculators in Radiology
to support your knowledge in radiology.
You will find here:
- 115 pages and counting
- Classifications
- Online calculators
- Tables
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?
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Grades of osteoarthritis by Ahlbäck
Grading of joint osteoarthritis by Ahlbäck uses plain postero-anterior weight-bearing radiographs to assess the extent of degenerative disease as joint space narrowing and bone attrition.
| Grade - Changes | Description |
|---|---|
| Grade I | joint space narrowing (<3mm) |
| Grade II | joint space obliteration |
| Grade III | minor bone attrition (0 - 5mm) |
| Grade IV | moderate bone attrition (5 - 10mm) |
| Grade IV | severe bone attrition (>10mm) |
References
1. Ahlbäck S. Osteoarthrosis of the knee: a radiographic investigation. Acta Radiol Stockholm 1968; (suppl 277):7-72.
2. Petersson IF, Boegård T, Saxne T, Silman AJ, Svensson B. Radiographic osteoarthritis of the knee classified by the Ahlbäck and Kellgren & Lawrence systems for the tibiofemoral joint in people aged 35-54 years with chronic knee pain. Ann Rheum Dis. 1997 Aug;56(8):493–6
3. Hernández-Vaquero D, Fernández-Carreira JM. Relationship between radiological grading and clinical status in knee osteoarthritis. a multicentric study. BMC Musculoskeletal Disorders. 2012 Oct 9;13(1):194
4. Davies AP, Calder DA, Marshall T, Glasgow MM. Plain radiography in the degenerate knee. A case for change. J Bone Joint Surg Br. 1999 Jul;81(4):632–5.
