Welcome to Classifications and Online Calculators in Radiology
to support your knowledge in radiology.
You will find here:
- 114 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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Featured page
Grades of osteoarthritis by Kellgren and Lawrence
Grading of joint osteoarthritis by Kellgren and Lawrence uses plain radiograph to assess the extent of degenerative disease. Originally, the authors assessed degenerative joint disease on a single x-ray view: AP for hips, knees, and feet, lateral view for cervical and lumbar spine, and PA view for hands. In the following studies, several mutations of this classification were used.
| Grade - Changes | Description |
|---|---|
| Grade 0 - None | no changes |
| Grade I - Doubtful | doubtful narrowing of joint space and possible osteophytic lipping |
| Grade II - Minimal | definite osteophytes, definite narrowing of joint space |
| Grade III - Moderate | moderate multiple osteophytes, definite narrowing of joint space, some sclerosis and possible deformity of bone contour |
| Grade IV - Severe | large osteophytes, marked narrowing of joint space, severe sclerosis and definite deformity of bone contour |
References
1. Schiphof D, Boers M, Bierma-Zeinstra SMA. Differences in descriptions of Kellgren and Lawrence grades of knee osteoarthritis. Ann. Rheum. Dis. 2008 Jul;67(7):1034–6.
2. Kellgren JH, Lawrence JS. Radiological assessment of osteo-arthrosis. Ann. Rheum. Dis. 1957 Dec;16(4):494–502.
3. Petersson I, Boegard T, Saxne T, Silman A, Svensson B. Radiographic osteoarthritis of the knee classified by the Ahlb?ck 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.
